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GB/T 3098.8-2010: Mechanical properties of fasteners -- Parts for bolted connections for use at temperatures from -200 Celsius~+700 Celsius Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 3098.8: Historical versions
Similar standardsGB/T 3098.8-2010: Mechanical properties of fasteners -- Parts for bolted connections for use at temperatures from -200 Celsius~+700 Celsius---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT3098.8-2010 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 21.060.10 J 13 Replacing GB/T 3098.8-1992 Mechanical properties of fasteners - Parts for bolted connections for use at temperatures from -200 °C ~ +700 °C ISSUED ON: JANUARY 10, 2011 IMPLEMENTED ON: OCTOBER 01, 2011 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of PRC; National Standardization Administration. Table of ContentsForeword ... 3 1 Scope ... 6 2 Normative references ... 6 3 Terms and definitions ... 7 4 Material and mechanical property grade ... 7 5 Inspection ... 15 6 Identification marks ... 17 7 Marking ... 17 Appendix A (Informative) Steel for high temperature or/and low temperature fasteners - Comparison of material designations between national standard and DIN EN 10269 ... 18ForewordThis Part of GB/T 3098 (hereinafter referred to as this Part) is one of the national standards "Mechanical properties of fasteners" series. The series includes: a) GB/T 3098.1-2010 Mechanical properties of fasteners - Bolts, screws and studs; b) GB/T 3098.2-2000 Mechanical properties of fasteners - Nuts - Coarse thread; c) GB/T 3098.3-2000 Mechanical properties of fasteners - Set screws; d) GB/T 3098.4-2000 Mechanical properties of fasteners - Nuts - Fine pitch thread; e) GB/T 3098.5-2000 Mechanical properties of fasteners - Tapping screws; f) GB/T 3098.6-2000 Mechanical properties of corrosion-resistant stainless-steel fasteners - Part 1: Bolts, screws and studs; g) GB/T 3098.7-2000 Mechanical properties of fasteners - Thread rolling screws; h) GB/T 3098.8-2010 Mechanical properties of fasteners - Parts for bolted connections for use at temperatures from -200 °C ~ +700 °C; i) GB/T 3098.9-2010 Mechanical properties of fasteners - Prevailing torque type steel nuts; j) GB/T 3098.10-1993 Mechanical properties of fasteners - Bolts, screws, studs and nuts made of non-ferrous metals; k) GB/T 3098.11-2002 Mechanical properties of fasteners - Drilling screws with taping screw thread; l) GB/T 3098.12-1996 Mechanical properties of fasteners - Cone proof load test on nuts; m) GB/T 3098.13-1996 Mechanical properties of fasteners - Torsional test and minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm; n) GB/T 3098.14-2000 Mechanical properties of fasteners - Widening test on nuts; o) GB/T 3098.15-2000 Mechanical properties of fasteners - Nuts made of stainless- steel; p) GB/T 3098.16-2000 Mechanical properties of fasteners - Set screws made of stainless-steel; q) GB/T 3098.17-1996 Mechanical properties of fasteners - Preloading test for the Mechanical properties of fasteners - Parts for bolted connections for use at temperatures from -200 °C ~ +700 °C1 ScopeThis part of GB/T 3098 specifies the material designations and mechanical properties of bolts and nuts, as well as the relevant technical requirements for low temperature toughness at -200 °C and high temperature strength at +700 °C. As an important supplement to GB/T 3098.1, GB/T 3098.2, GB/T 3098.4, it is applicable to the mechanical properties of fasteners in special working environments with working temperatures below -50 °C or above +150 °C.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 228 Metallic materials - Tensile testing at ambient temperature (GB/T 228- 2002, eqv ISO 6892:1998) GB/T 3098.1 Mechanical properties of fasteners - Bolts, screws and studs (GB/T 3098.1-2010, ISO 898-1:2009, MOD) GB/T 3098.2 Mechanical properties of fasteners - Nuts - Coarse thread (GB/T 3098.2-2000, idt ISO 898-2:1992) GB/T 3098.4 Mechanical properties of fasteners - Nuts - Fine pitch thread (GB/T 3098.4-2000, idt ISO 898-6:1994) GB/T 3098.6 Mechanical properties of fasteners stainless steel bolts, screws and studs (GB/T 3098.6-2000, idt ISO3506-1:1997) GB/T 3098.15 Mechanical properties of fasteners stainless nut (GB/T 3098.15-2000, idt ISO 3506-2:1997) GB/T 3103.4 Tolerances for fasteners - Components for bolted connections made mainly from materials with a high temperature strength GB/T 3104 Fasteners - Widths across flats of hexagon products (GB/T 3104-1982, eqv ISO 272:1982) GB/T 4340.1 Metallic materials - Vickers hardness test - Part 1: Test method (GB/T 4340.1-2009, ISO 6507-1:2005, MOD) GB/T13807.2 Connections with waisted stud - Studs (GB/T 13807.2-2008, DIN 2510-3/4/8:1971, MOD) GB/T13807.3 Connections with waisted stud - Nuts, extension sleeves (GB/T 13807.3-2008, DIN 2510-5/6/7:1971, MOD) DIN EN 10269:2006-07 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties AD 2000 - Instructions W2 1), austenitic and austenitic - Ferritic steels AD 2000 - Instructions W7 1), bolts and nuts made of ferritic steel AD 2000 - Instructions W10 1), low temperature materials - Iron materials TRD 106 1) Steel bolts and nuts VdTUV WB 113/2 2) Rolled or forged high temperature resistant austenitic steel, ×8 CrNiMoBNb16-16+wk - Material number Nr1.4986+wk VdTUV WB 435/3 2) Rolled or forged heat-resistant austenitic steel, ×5Ni Cr Ti 26 15-16 - Material number Nr1.4980 VdTUV WB 490 2) Bolts and nuts made of heat-resistant steel 35B2 - Material number Nr1.55113 Terms and definitionsThe terms and definitions specified in DIN EN 10269, GB/T 3098.1, GB/T 3098.2, GB/T 3098.4, GB/T 3098.6, GB/T 3098.15 apply to this Part.4 Material and mechanical property grade4.1 Mechanical properties Table 1 gives austenitic steel fasteners with a minimum operating temperature of - 200 °C. The properties of the material shall comply with the provisions of GB/T 3098.6 and GB/T 3098.15. 1 Source: Beuth Publishing Co., Ltd., Berlin 10772. 2 Source: TÜV Publishing Co., Ltd. Rheinland, Postal Code 101750, 50672 Cologne. - The tensile strength of the nut material shall be higher than 70% of the tensile strength of the bolt material; - The reasonable matching of bolt and nut materials is shown in Table 3. Note: If the bolt material is selected according to Table 3 and a load-bearing sleeve is used, the load-bearing sleeve shall preferably be made of the same material as the bolt. 4.2.2 Bolts with full load capacity Bolts that meet the following requirements at the time of fracture can be considered to have full load capacity: - When the bolts are subjected to a tensile test, the minimum tensile load (Rm,min × As, nominal) in Table 4a or Table 5a can be reached; - When the bolts made of steel and nickel-chromium steel in Table 2 are tested according to GB/T 3098.1, the fracture shall occur within the length of the unthreaded thread; - When the bolts made of austenitic steel in Table 1 are tested according to GB/T 3098.6, the fracture shall occur within the length of the unthreaded thread or the unthreaded shank. 4.2.3 Nuts with full load capacity When broken, nuts that meet the following requirements can be considered to have full load capacity: - The nut can withstand the minimum tensile load of the bolt given in Table 4a or Table 5a (Rm,min × As, nominal); - The outer diameter of the round nut or the minimum width across flats of the hexagonal nut meets the requirements of GB/T 3104; - The minimum height of the coarse-pitch nut meets the requirements of Type 1; the minimum height of the fine-pitch nut meets the requirements of Type 2. performed on the actual bolts in accordance with GB/T 3098.6 to determine RP0.2, Rm, A. For bolts with full load-bearing capacity and materials in accordance with Table 2, a tensile test is performed on the actual bolts in accordance with GB/T 3098.1 to determine Rm (Table 3). 5.3 Nuts with full load-bearing capacity Arbitration test: For nuts with full load-bearing capacity and materials in accordance with Table 1 or Table 2, the proof load is determined in accordance with GB/T 3098.2 or GB/T 3098.4 (Table 4b or Table 5b). 5.4 Bolts with reduced load-bearing capacity Arbitration test: For waisted shank bolts with reduced load-bearing capacity and materials in accordance with Table 1, a tensile test is performed on the actual bolts in accordance with GB/T 228 to determine: RP0.2, Rm, A, Z (according to DIN EN 10269). For bolts with reduced bearing capacity and materials in accordance with Table 1, low head bearing capacity, and uniform performance (such as grade 50, state as +AT according to DIN EN 10269), tensile tests are carried out on machined samples according to GB/T 228 to determine: RP0.2, Rm, A, Z (according to DIN EN 10269). For bolts with reduced bearing capacity and materials in accordance with Table 1, low head bearing capacity, grade 70 (state as +C700 according to DIN EN 10269), and cold work hardened, tensile tests are carried out on the actual bolts according to GB/T 3098.6 to determine the minimum tensile load. For bolts with reduced bearing capacity and materials in accordance with Table 2, tensile tests are carried out on machined samples according to GB/T228 to determine: RP0.2, Rm, A, Z (according to DIN EN 10269). Only when the bolt length cannot be subjected to tensile testing, its Vickers hardness value is tested according to GB/T 4340.1 (according to GB/T 3098.1). 5.5 Nuts with reduced load capacity For nuts with reduced load capacity and materials in accordance with Table 1, the proof load shall be determined according to GB/T 3098.2 or GB/T 3098.4. For nuts with reduced load capacity and materials in accordance with Table 2, the Vickers hardness shall be determined according to Table 2 and GB/T 4340.1.6 Identification marksConnector products that meet the requirements of this Part must have the manufacturer's identification mark; the steel group and performance grade shall be made according to Table 1, or the manufacturer's identification mark and material abbreviation shall be made according to Table 2. If there is no other agreement, the marking requirements shall be selected from GB/T 3098.6, GB/T 3098.15 or GB/T 3098.4, or GB/T13807.2 and GB/T 13807.3. When the design of austenitic bolts or nuts requires a certain material, the material number shall be used instead of the steel group selected according to GB/T 3098.6 or GB/T 3098.15.7 MarkingFasteners made of cold-toughness or high-temperature strength materials shall be marked with the steel group and performance grade according to Table 1, or the abbreviation of the material shall be marked according to Table 2, for example: Marking of equal-length double-headed studs with thread specification d = M30, nominal length l = 200 mm, L-type, material A4-70, product grade TB, surface with oxidation treatment: Stud GB/T 13807.2 LM30×200-TB-A4-70-Oxidation Marking of equal-length double-headed studs with thread specification d = M30, nominal length l = 200 mm, L-type, material GA, product grade TB, surface with oxidation treatment: Stud GB/T 13807.2 LM30×200-TB-GA-oxidation When austenitic bolts or nuts are designed with certain materials, the material number shall be used instead of the marking of the steel group selected according to GB/T 3098.6 or GB/T 3098.15: Stud GB/T 13807.2 LM30×200-TB-1.4541-70-oxidation ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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