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GB 27704-2011: [GB/T 27704-2011] Steel nails
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Basic data

Standard ID	GB 27704-2011 (GB27704-2011)
Description (Translated English)	[GB/T 27704-2011] Steel nails
Sector / Industry	National Standard
Classification of Chinese Standard	J13
Classification of International Standard	21.060.50
Word Count Estimation	47,428
Date of Issue	2011-12-30
Date of Implementation	2012-12-01
Quoted Standard	GB/T 191; GB/T 228; GB/T 230.1-2004; GB/T 342-1997; GB/T 701; GB/T 1216; GB/T 2828.1-2003; GB/T 2973; GB/T 4232; GB/T 4354; GB/T 5267.1; GB/T 6311; GB/T 13912; GB/T 21389; JB/T 8928; YB/T 5294; YB/T 5303; JJF 1070-2005; JJG 33
Regulation (derived from)	Announcement of Newly Approved National Standards No. 22 of 2011
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This Chinese standard specifies the terms and definitions nails, classification, marking, requirements, test methods, inspection rules, packaging, labeling, transportation and storage. This standard applies to hand tools and power tools hammering nails with a nail struck. But for power tools hitting nail connection with materials and methods not specified.

GB 27704-2011: [GB/T 27704-2011] Steel nails

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Steel nails ICS 21.060.50 J13 National Standards of People's Republic of China Pinning Issued on. 2011-12-30 2012-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 Category 2 5 Mark 2 5.1 shape 2 Specifications 4 5.2 5.3 Method 4 mark 5.3.1 mark mode 4 5.3.2 markup order 4 6 Requirement 4 Raw materials 4 6.1 4 6.2 shape 6.2.1 nail 4 6.2.2 Shank 4 6.2.3 nail tip 5 6.2.4 eccentricity 5 6.3 Size 5 6.4 Surface quality 5 6.4.1 Appearance 5 6.4.2 Surface Treatment 5 6.5 Mechanical properties 5 6.5.1 tensile strength of 5 6.5.2 Hardness 6 6.5.3 bending angle 6 6 6.6 Net content Net content 6.6.1 single physical package 6 6.6.2 allows physical bulk packaging net content 7 7 Test methods 7 7.1 material 7 7 7.2 shape 7.2.1 nut 7 7.2.2 Shank 7 7.2.3 nail tip 7 7.2.4 eccentricity 8 7.3 Size 8 7.4 surface quality 8 7.4.1 nail surface without surface treatment quality 8 7.4.2 After the nail surface quality of the surface treatment 8 7.5 Mechanical properties 8 7.5.1 tensile strength 8 7.5.2 Hardness 9 7.5.3 bending angle 9 9 7.6 Net content 8 9 inspection rules 8.1 Inspection classification 9 8.2 Test sequence 9 8.3 Type inspection 9 8.4 Test item 9 8.5 Inspection and bulk sampling program 10 8.5.1 test batch (N) 10 8.5.2 Test level 10 8.6 determine the rules 11 9 packaging, labeling, transportation and storage 11 9.1 Packaging 11 9.2 identifies 12 9.3 Transport 12 9.4 Storage 12 Appendix A (normative) common nails 13 Appendix B (normative) flooring nails 16 Annex C (normative) concrete nails 17 Annex D (normative) Pallet nails 20 Appendix E (normative) drum head shaped nails 22 Annex F (normative) roofing nails 24 Annex G (normative) plasterboard nails 25 Annex H (normative) twin screw cap 27 Annex I (normative) the volume of ordinary nails with nail (with power tool hit the nail -1) 28 Appendix J (normative) plastic nails with a nail (the striking power tool with nail -2) 32 Annex K (normative) felt Vol nails with a nail (the striking power tool with nail -3) 35 Annex L (normative) nails with nail paper discharge connection (with power tool hit the nail -4) 37 Annex M (normative) nails with nail steel row connection (with power tool hit the nail -5) 39 Annex N (normative appendix) T-shaped plastic head nails (nails with a power tool hit -6) 41

Foreword

6.5.2,6.5.3,6.6 this standard are mandatory, others are recommended. The standard proposed by China National Light Industry Council. This standard by the National Hardware Standardization Technical Committee (SAC/TC174) centralized. This standard by the Beijing Darui Hing nail Co., Ltd. is responsible for drafting by Beijing Xing Delta nail industry limited liability company, Shandong Oriental Cherry Hardware Group Participate Ltd., Shanxi Yuci lofty Wire Products Co., Hai Rui Shanxi Hardware Industry Co., Ltd. drafted. The main drafters of this standard. Wang Li, Zhao Jianbo, WANG Shou-yi, Chen Yuan Chun, Yueyao Chang, Wang, Zhaoling Sheng, Li Zhenhai. Pinning

1 Scope

This standard specifies the terms and definitions nail, classification, marking, requirements, test methods, inspection rules, packaging, labeling, transportation and storage. This standard applies to hand tools, power tools and hammering nails with a nail struck with. But the striking power tool connected with the nail timber Materials and methods not provided.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 191 Packaging - Pictorial signs GB/T 228 metal materials at room temperature tensile test method GB/T 230.1-2004 Metallic Rockwell hardness test - Part 1. Test methods (A, B, C, D, E, F, G, H, K, N, T scale) GB/T 342-1997 cold drawn round, square steel, hexagonal wire size, shape, weight and tolerance GB/T 701 low carbon steel hot rods GB/T 1216 outside micrometer GB/T 2828.1-2003 Sampling procedures for inspection - Part 1. by acceptance quality limit (AQL) retrieval batch test sample plan GB/T 2973 Zinc Coating quality test methods GB/T 4232 with stainless steel wire cold upsetting GB/T 4354 quality carbon steel hot rod GB/T 5267.1 fasteners plating layer GB/T 6311 Wide Range dial GB/T 13912 Metallic coatings Steel parts hot-dip galvanized layer of technical requirements and test methods GB/T 21389 cursor, with table and several Caliper JB/T 8928 steel parts galvanized machinery YB/T 5294 general purpose low carbon steel wire YB/T 5303 quality carbon structural steel JJF1070-2005 prepackaged goods measured net content inspection rules JJG33 universal point scale test procedures

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Nail nailhead Big nail on the head body. 3.2 Shank nailshank Rod-shaped portion of the nail body. 3.3 Nail tip nailpoint The tip of the nail body. 3.4 Curvature straightness Within the entire length of the nail, the maximum value of bending deformation. 3.5 Eccentricity headdeviation Nail shank off-center from the center line. 3.6 The power tool hit with nail powerdrivennails Plastic, paper tape, wire and nail adhesive and other materials will link up to meet the power tool or automated equipment hit The connecting member within the nail. Category 4 In accordance with the nail into the use of hand tools and power tool with a thump struck with nail categories. Depending on the shape or intended use, hand Hammering nails into dynamic tools with common nails (see Appendix A), flooring nails (see Appendix B), concrete nails (see Appendix C), pallet nails (see Appendix D), Drum head staples (see Appendix E), roofing nails (see Appendix F), plasterboard nail (see Appendix G) and double cap screw (see Appendix H); hitting with power tool Pinning is divided into ordinary volumes nails with a nail (see Appendix I), plastic nails with a nail (see Appendix J), felt Vol nails with a nail (see Appendix K), the paper discharge connecting nail nails (See Appendix L), steel row nails with nail connection (see Appendix M) and the T-shaped head plastic nails (see Appendix N).

5 Mark

5.1 shape Pinning generally consists of the nut, shank and sharp nails three parts. Nail shape mark in accordance with Table 1, Table 2 should be the shape of the shank mark, nail tip Shape in accordance with Table 3 mark. Table 1 nail shape Nail shape symbol shape (for example) A pocket cap Cup-shaped cap B C C-shaped cap D D-shaped cap Drum head shaped cap G Table 1 (continued) Nail shape symbol shape (for example) Flat-shaped hat P H-shaped pattern cap Q spherical cap T-shaped hat T Round table cap Y Conical cap Z Table 2 Shank shape Shank shape symbol shape (for example) Square rod F The ring-shaped lever HW Helical-shaped rod LX Chute-bar XC AeroBars Y Crimped-bar YH Straight slotted shaft ZC Table 3 nail tip shape Nail tip shape sign shape (Example) Lateral C-shaped tip Bullet-shaped tip D Diamond tip L No sharp W Wedge pointed X Tapered tip Z 5.2 Specifications Nail specifications Arabic numerals combination shank diameter and length of the shank is marked (in mm); shank diameter and length of the shank Between use of the symbol "×" connection; nail should follow the specifications in Appendix A, Appendix B, Appendix C, Appendix D, Appendix E, Appendix F, Appendix G, Appendix H, Appendix I, Appendix J, Appendix K, Appendix L, M and Appendices Appendix N provisions; special specification orders when specified in the contract. 5.3 labeling method 5.3.1 mark mode The type and shape of the nail marks, with the Chinese species, nail shape characteristics of the Chinese phonetic alphabet and number combinations nail specifications, in accordance with Table 1, Table 2 and Table 3 mark. In general, the pattern shape steel nails cap, shank shape of a round bar, nail tip shape diamond tip shape Feature can be omitted when labeling. 5.3.2 markup order Tag order in accordance with the type of nail products, nail shape, size, shape of the shank, the shape of the nail tip order sequentially. Nail surface Management mode, using Chinese characters in front of the species marked out. See examples. Example. Plating Pallet nails species Nail shape 2.68 Shank diameter × 50.8 Shank length LX Shank shape Nail tip shape He said. Shank diameter of 2.68mm, shank length 50.8mm, flat-shaped nut, helical rod-shaped nails, nail without sharp plating tray.

6 Requirements

6.1 raw materials Manufacturing wire nails commonly used as a raw material. The use of low-carbon steel nails raw, raw materials shall comply with GB/T 701's; Use high-quality carbon steel nail raw, raw materials shall comply with GB/T 4354's. Stainless steel nail raw, raw materials Shall comply with GB/T 4232; or the use of other materials than the above criteria. 6.2 shape 6.2.1 nut Screw cap does not allow significant skew and crack; round nail ovality should not exceed 16% of the nominal shank diameter; nail shape should follow According to Appendix A, Appendix B, Appendix C, Appendix D, Appendix E, Appendix F, Appendix G, Appendix H, Appendix I, Appendix J, Appendix K, Appendix L, M and Appendix N the provisions of appendix. 6.2.2 Shank Shank should ensure straight nail length greater than 20mm, the bending of δ should be less than 0.005L, in units of mm, shown in Figure 1; long Less than or equal to 20mm steel nails, visual should be no significant bending. Shank shape should comply with Annex A, Annex B, Appendix C, Appendix D, Appendix E, Appendix F, Appendix G, Appendix H, Appendix I, Appendix J, Appendix K, Appendix L, M and Appendices Appendix N of the rules.

1 Shank curvature

6.2.3 nail tip Nail tip should not significantly skew, there should be flat or sharp fins; nail tip angle should be in accordance with Appendix A, Appendix B, Appendix C, Appendix D, Appendix E, Appendix F, Appendix G, Appendix H, Appendix I, Appendix J, Appendix K, Appendix L, M and Appendices Appendix N of the rules. 6.2.4 eccentricity Eccentricity E should be less than (0.1 × d) mm, in millimeters, as shown in Fig. Figure 2 eccentricity 6.3 Dimensions Different types and specifications of nail should be sized in accordance with Appendix A, Appendix B, Appendix C, Appendix D, Appendix E, Appendix F, Appendix G, Appendix H, Appendix I, Appendix J, Appendix K, Appendix L, M and Appendices Appendix N of the rules. 6.4 surface quality 6.4.1 Appearance Nail appearance should be smooth, no significant injuries or glitches, not rust. 6.4.2 Surface Treatment 6.4.2.1 nail surface may be electrochemical plating process. Electrochemical coating surface should be uniform and shiny, firmly attached, there should be no blistering, off Fall, black spots or drain plating defects such as partial coating thickness should not be less than 0.003mm, in line with GB/T 5267.1 requirements. 6.4.2.2 nail surface can be mechanically galvanized. Coating the surface should be seamless plating, no black spots, no peeling, uniform and smooth, firmly attached; zinc Layer thickness should not be less than 0.005mm, the surface should be consistent with JB/T 8928 requirements. Galvanized surface treatment machinery, as long as the zinc layer thickness Not less than the predetermined value, the plated surface allows the presence of dark or light gray color uneven areas. 6.4.2.3 nail surface can be hot dip galvanized. Zinc plating layer surface should be seamless, no black spots, no peeling, no zinc thorns, uniform and smooth, attachment Solid, no adhesion to each other; zinc coating thickness should not be less than 0.035mm, comply with GB/T 13912 of. After hot-dip galvanized table Surface, as long as the zinc coating thickness not less than a predetermined value, the plated surface allows the presence of dark or light gray color uneven areas. 6.4.2.4 nail surface coatings can be used for surface coating; coating layer should cover even and firm, should be seamless coating, no loss. 6.5 Mechanical properties 6.5.1 Tensile strength 6.5.1.1 The use of low-carbon steel nail tensile strength shall meet the requirements of Table 4. Table 4 Tensile Strength Table Nominal diameter mm tensile strength MPa > 880 to 1320 0.80 to 1.20 > 1.20 1.80 785 ~ 1220 ~ > 1.80 2.50 735 ~ 1170 ~ > 2.50 3.50 685 ~ 1120 ~ > 590 to 1030 3.50 to 5.00 > 5.00 - 10.00 540 - 930 Note. The organization also produced according to customer agreement. 6.5.1.2 Use of high-quality carbon steel materials shall comply with the tensile strength of steel nails YB/T 5303's. 6.5.1.3 The use of stainless steel nail tensile strength shall comply with GB/T 4232's. 6.5.2 Hardness After heat treatment to obtain a higher hardness of nails, the shank diameter greater than 2.2mm steel nail hardness should not be less than 49HRC; shank diameter Less than or equal to 2.2mm steel nail hardness should not be less than 45HRC. Note. The nail hardness without heat treatment is not required. 6.5.3 bending angle After heat treatment to obtain a higher hardness nail bending angle should satisfy not break when bent 30 °. Note. The non-heat treated nail bending angle is not required. 6.6 Net content Net content 6.6.1 single physical package Net weight single physical package should be consistent with the representation on the packaging; marked net content and the actual content of not greater than the difference between Tables 5 and 6 The allowable amount of the shortage of provisions. Table 5 Net content allows shortfall Each box (box) within the nail Net content (Qn) Allow shortfall (T) Percentage Allow shortfall 0 to 50 (50) 9 - 50 to 100 (including 100) - 4.5 100 to 200 (including 200) 4.5 - 200 to 300 (including 300) - 9 300 to 500 (including 500) 3 - 500 to 1000 (including 1000) --15 1,000 to 10,000 (including 10,000) 1.5 - 10,000 to 15,000 (including 15,000) - 150 15,000 to 50,000 (including 50,000) 1 - When Qn≤1kg, T-bit value is 0.01g to 0.1g rounding; when Qn > 1kg time, T-bit values rounded to 0.1g g. When a single pin net content quality is greater than a predetermined tolerance, in order to limit the quality of a pin. Table 6 Number of scale allow a shortage of units for the root (Box) within the pin number every box (Qn) allows shortfall (T) Qn≤50 0 Qn > 50 Qn × 1% When Qn > 50, the number of allowed shortfall calculated result is not an integer rounded; after rounding if greater than 1%, as allowed shortfall. 6.6.2 allows physical bulk packaging net content The same number of deliveries of the same type, the average actual net content of prepackaged with the specifications of the nail should be greater than or equal to its net content labeling. The actual net content of prepackaged single sampling inspection and labeling of the nail of the difference between net content shall not be larger Tables 5 and 6 provisions allow short Ullage.

7 Test methods

7.1 raw materials Nail manufacturing and chemical composition of raw materials used should check the manufacturer of the nail plate with the supply provided by the batch tested or checked rod Measurement report. 7.2 shape 7.2.1 nut Visually inspect and measure calculations. Nail ovality equal nail diameter measurement difference between maximum and minimum values; values after the decimal places Two. 7.2.2 Shank Visually inspect and measure calculations. When measuring the curvature of the shank, the nail should be placed on measuring instrument bent nail tip and shank cutting part on the measured curve Anchor outside the instrument, gently rotating pin, so that the most prominent part bending upward, should be used in line with GB/T 6311 regulations, indexing value 0.01mm dial indicator to measure the value of the highest and lowest points. 3, the difference between the highest and lowest values of the binary point value One of the values, that is, the curvature of the shank, the value to two decimal places.

3 Shank curvature measurement

7.2.3 nail tip Visually inspect and measure calculations. Shall be consistent with the provisions of JJG33 universal angle ruler or magnification of not less than 10 times the projector into Line measurement. 7.2.4 eccentricity Use in line with GB/T 21389 regulations, indexing vernier caliper measurement is 0.02mm and calculate eccentricity, it shall comply with 6.2.4. 4, according to the following formula. E = S1-S22 Where. E --- eccentricity millimeters (mm); S1 --- nail edge departs from the side of the shank of the standoff distance, in millimeters (mm); S2 --- nail shank smallest deviation from the edge of the side of the standoff distance, in millimeters (mm). Calculation result to two decimal places. Figure 4 eccentricity calculation method 7.3 Dimensions It should be used in line with GB/T 1216 regulations, dividing the value of the outer diameter of 0.01mm micrometer to measure the diameter of the shank; should be used in line with GB/T 21389 regulations, indexing vernier caliper measurement of other dimensions is 0.02mm. 7.4 surface quality 7.4.1 nail surface quality without surface treatment Without surface coating, plating nail, using visual methods and hand-touch inspection. 7.4.2 surface-treated nail surface quality 7.4.2.1 nail through the surface of the electrochemical plating, coating thickness and surface quality should be measured in accordance with the provisions of GB/T 2973's. 7.4.2.2 nail through the surface of mechanically galvanized plating thickness and surface quality should be measured in accordance with GB/T 8928 regulations. 7.4.2.3 nail through the surface of hot-dip galvanized coating thickness and surface quality should be measured in accordance with the provisions of GB/T 13912 of. 7.4.2.4 surface coating treatment and electrochemical plating, mechanical galvanization, hot dip nail treatment, under normal operating conditions should not have flaking or peeling phenomenon. Percussion and bending were then plated coating produced flaking and peeling phenomenon, does not indicate coating, the coating adhesion is not good. For parties with special Specific requirements, must be tested for adhesion, negotiated by the supply and demand sides. 7.5 Mechanical properties 7.5.1 Tensile strength In accordance with the provisions of GB/T 228, with the tensile tester to measure. 7.5.2 Hardness In accordance with the provisions of GB/T 230.1-2004 were measured using a Rockwell hardness tester. 7.5.3 bending angle When the bending angle measurement should nail in the vise, hand hammer hitting a lateral move or bend steel pipe, measuring the bending angle. If the shank broken, broken nails need to correct the docking bar and then measuring the bending angle. 7.6 Net content Use minimum scale value is less than the net content of the product packaging showing the regulations allow shortfall weighing apparatus for measurement.

8 Inspection Rules

8.1 Inspection classification Inspection is divided into type inspection and factory inspection. 8.2 Test order When the test should be the first non-destructive to the sample size, appearance and other items inspection, after passing inspection and destructive hardness Bending angle test project. 8.3 Type inspection One of the following situations occurs, the type of inspection should be carried out. a) new products or old products to the plant identification; b) production, such as materials, processes, product mix major changes, could cause the performance variation; c) production, cumulative production of certain batches spot checks; d) Product Discontinuance more than one year, the production recovery; e) factory inspection results are quite different and the last type test results. 8.4 Test Project Type test and factory inspection items are shown in Table 7. Table 7 type test and factory inspection items table No Item factory inspection type test requirements Test Method No. reg reg number Raw materials ○ ● 6.1 7.1 2 Shape ● ● 6.2 7.2 3 Dimensions ● ● 6.3 7.3 4 surface quality ● ● 6.4 7.4 5 tensile strength ○ ● 6.5.1 7.5.1 6 hardness ● ● 6.5.2 7.5.2 7 bending angle ● ● 6.5.3 7.5.3 8 net content ● ● 6.6 7.6 Note. "●" is always checked; "○" to select items. 8.5 Inspection and bulk sampling program 8.5.1 test batch (N) Net content inspection batch determined in accordance with the provisions of JJF1070-2005; test batch of other items in accordance with GB/T 2828.1- 2003 shall be determined. Nails should test batches, each batch from the same species, the same size, the same production process conditions and delivery status of steel Nail composition. 8.5.2 Test level 8.5.2.1 substandard classification According to the provisions of GB/T 2828.1-2003 in 3.1.5, nail substandard classification Table 8. Table 8 substandard classification Category nonconformity hardness Bending angle net weight A1 raw materials size shape tensile strength C surface quality According to GB/T 2828.1-2003 10.1 provisions for Class A steel nails, test level class B items for a particular test failed Levels (S-2); Class C non-conformance test level for the general test level (Ⅰ). 8.5.2.2 acceptance quality limit (AQL) In accordance with the provisions of GB/T 2828.1-2003 in Chapter 5, hand tools, hammering nails with the acceptance quality limit (AQL). A sub-category Grid 1.0, Class B and Class C unqualified 2.5; power tool hit the nail with the acceptance quality limit (AQL). A class failed to 0.65, B Class A and C failed 1.5. 8.5.2.3 Sampling Plan Nail normal inspection determines a sampling program in accordance with the provisions of GB/T 2828.1-2003's. When the test batch (N) is 150 001 ~ 500 000, the pin test a sampling program examples are shown in Table 9. Table 9 pin test sample a sampling program Pinning species Substandard classification test Level Sample size Character code The reception quality Quantity is limited (AQL) Normal inspection tightened inspection reduced inspection Sample size (N) Receiving data (Ac) Rejection number (Re) Sample size (N) Receiving data (Ac) Rejection number (Re) Sample size (N) Receiving data (Ac) Rejection number (Re) Hand thump With nails A S-2 E 1.0 13 0 1 20 0 1 5 0 1 B S-2 E 2.5 20 1 2 32 1 2 13 1 2 C Ⅰ M 2.5 315 14 15 315 12 13 125 8 9 Table 9 (continued) Pinning species Substandard classification test Level Sample size Character code The reception quality Quantity is limited (AQL) Normal inspection tightened inspection reduced inspection Sample size (N) Receiving data (Ac) Rejection number (Re) Sample size (N) Receiving data (Ac) Rejection number (Re) Sample size (N) Receiving data (Ac) Rejection number (Re) Power tool With striking With nails A S-2 E 0.65 20 0 1 32 0 1 5 0 1 B S-2 E 1.5 32 1 2 13 0 1 20 1 2 C Ⅰ M 1.5 315 10 11 315 8 9 125 6 7 8.5.2.4 normal, tightened and reduced inspection 8.5.2.4.1 in accordance with the provisions of GB/T 2828.1-2003 in Chapter 9, nail normal inspection tests are used. 8.5.2.4.2 When using normal inspection, if the situation GB/T 2828.1-2003 in Chapter 9 of the transfer rule satisfy the conditions occur, Corresponding transfer to tightened inspection, reduced inspection or suspend inspection. 8.5.2.5 Net content inspection In the same species, the same size, the same production batch of the finished product packaging (box), the net weight and the number of samples. Single prepackaged Suppliers Products marked difference between the net weight and its actual content greater than the permitted number of pieces and the shortfall of the average actual content of the sample, should be consistent JJF1070-2005 specified in 4.3.2. Table 10 the number of samples in the sample net content requirements Batch tests (N) Extracting sample size (n) Allows more than 1 and less than or equal to 2 times Allow the number of shortfall Allow greater than 2 times the amount of shortage of the number allowed 11 ~ 501000 51 ~ 991 310 100 ~ 5005030 501 ~ 32,008,050 More than 320,012,570 8.6 determine the rules 8.6.1 A1 class only qualified suppliers provided the batch test rod or test reports prove a one-time check, not by GB/T 2828.1-2003 execution. 8.6.2 sample of test items, the one does not meet any of the criteria, it is determined that the product failed. 9 packaging, labeling, transportation and storage 9.1 Packaging Packaging should ...

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