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BZJ463-2014: Cold rolled steel sheet and strip for automobile spare parts BZJ463: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| BZJ 463-2014 | English | 199 |
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Cold rolled steel sheet and strip for automobile spare parts
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BZJ 463-2014
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| BZJ 463-2009 | English | 199 |
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Cold Rolled Steel Plate and Strip for Automobile Spare Parts
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BZJ 463-2009
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Standard similar to BZJ463-2014 BZJ 465 BZJ 471 BZJ 464 Basic data | Standard ID | BZJ 463-2014 (BZJ463-2014) | | Description (Translated English) | Cold rolled steel sheet and strip for automobile spare parts | | Sector / Industry | Chinese Industry Standard | | Word Count Estimation | 5,543 | | Issuing agency(ies) | Baosteel Group Corporation | BZJ463-2014: Cold rolled steel sheet and strip for automobile spare parts---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.
Cold rolled steel sheet and strip for automobile spare parts
Baoshan Iron & Steel Co., Ltd. Enterprise interim technical supply conditions
Auto Parts and cold-rolled steel sheet and strip
1 Scope
Replacing BZ J 463-2009
The technical delivery conditions apply to interim Baoshan Iron & Steel Co., Ltd. production of auto parts with cold-rolled steel sheet and strip (hereinafter
Acronym steel sheet and strip).
2 Normative References The following documents for the application of this document is essential. For dated references, only the note
Version Date apply to this document. For undated references, the latest edition (including all amendments) fitness
Used in this document.
GB/T 222-2006 finished steel chemical composition and permissible variations
GB/T 223 steel and alloy chemical analysis method
RT Test Method. Test Part 1 GB/T 228.1-2010 metal material tensile
GB/T 230.1-2009 metallic materials - Rockwell hardness test - Part 1. Test methods (A, B, C, D, E,
F, G, H, K, N, T scales)
GB/T 232-2010 metallic materials - Bend test
Methods of measurement GB/T 2523-2008 cold-rolled sheet metal (with) the surface roughness and peak number of
GB/T 2975-1998 steel and steel products for mechanical testing and sample preparation position
GB/T 4336-2002 carbon steel and low alloy steel spark source atomic emission spectrometry method (conventional method)
GB/T 8170-2008 revised value represents about rules and limit values and judgment
GB/T 20066-2006 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method
GB/T 20123-2006 Steel - Determination of total carbon and sulfur content of the high-frequency induction furnace combustion infrared absorption method (conventional manner
law)
GB/T 20125-2006 Determination of low-alloy steel by inductively coupled plasma atomic emission spectroscopy multi-element content
GB/T 20126-2006 Determination of non-alloy steel of low carbon content - Part 2. induction furnace (preheated) combustion within
Infrared absorption method
Q/BQB 400 cold-rolled products, packaging, labeling and inspection documents
Size Q/BQB 401 cold-rolled steel sheet and strip, shape, weight and tolerance
3 Classification and designation
3.1 grade steel sheet and strip, available specifications and use shall comply with the requirements of Table 1.
Table 1
Grade specifications for use Thickness mm Width
B320LW 2.0 ~ 3.0 ≤1250 steel car wheels B360LW 2.0 ~ 3.0 ≤1200
B440QZ 1.5 ~ 2.5 900 ~ 1400 automobile steel shaft
B350JL 0.80 ~ 2.0 900 ~ 1300 Car clutch
St12G 2.0 ≤1250 Car Bracket
St14J 1.75 ≤900 sedan pay bracket
BMCP84 1.5 ~ 3.0 900 ~ 1350 automobile clutch friction plate steel
Stl2Q 2.0 ~ 3.5 900 ~ 1300 automobile chassis steel Stl2Q1 2.0 ~ 3.0
3.2 steel sheet and strip by surface quality distinction should meet the requirements of Table 2.
Baoshan Iron & Steel Co. 2014-10-18 Issued on. 2015-03-31 before implementation
Table 2
Level code
More advanced surface finishing FB
Advanced surface finishing FC
Premium surface finishing FD
3.3 steel sheet and strip by surface structure distinction should be in accordance with Table 3.
table 3
Surface structure code
Pock D
Bright surface B
4 Ordering information required
The user must provide the following information when ordering 4.1.
a) Product Name (steel or steel);
b) The number of interim technical supply conditions;
c) grades;
d) Product specifications and dimensions, roughness accuracy;
e) the edge of the state;
f) surface structure;
g) surface quality levels;
h) packaging;
i) weight;
j) use;
k) Other.
4.2 If the contract does not indicate the size of the order and precision of flatness, surface structure, surface quality level, marginalized and packaging
Mode, the present interim supply products according to technical conditions of ordinary size and flatness accuracy, surface structure surface Ma (D), higher
Trimming or trimming strip steel supply surface finishing (FB) and press for packaging provided by the packaging.
5 size, shape, weight and tolerance
Thickness 5.1 B360LW allowable deviation should be consistent with Q/BQB 401 senior precision (PT.B) regulations.
Thickness 5.2 BMCP84 allowable deviation of ± 0.09mm.
5.3 B440QZ, BMCP84 usually roll delivery. B440QZ volume weight is generally not more than 15 tons. BMCP84 strip weight
Less than 8 tons.
5.4 Other steel sheet and strip size, shape, weight and tolerances shall comply with the provisions of Q/BQB401 of.
6 Technical Requirements
6.1 Chemical composition
6.1.1 chemical composition of steel (melting analysis) should meet the requirements of Table 4.
Table 4
Chemical composition (Heat analysis)% (by mass) C Si Mn PS Alt
B320LW ≤0.12 ≤0.05 0.6 ~ 1.0 ≤0.030 ≤0.025 ≥0.020
B360LW ≤0.12 ≤0.30 0.8 ~ 1.20 ≤0.030 ≤0.025 ≥0.020
B440QZ 0.17 ~ 0.27 0.15 ~ 0.37 0.4 ~ 0.7 ≤0.035 ≤0.035 -
BMCP84 0.14 ~ 0.25 - - ≤0.04 ≤0.05 -
B350JL 0.07 ~ 0.13 ≤0.12 0.30 ~ 0.60 ≤0.035 ≤0.035 -
St12G 0.07 ~ 0.14 - 0.35 ~ 0.65 ≤0.035 ≤0.035 -
St14J ≤0.08 - ≤0.40 ≤0.02 ≤0.03 ≥0.025
Stl2Q ≤0.10 ≤0.05 0.40 ~ 1.00 ≤0.030 ≤0.025 ≥0.020
Stl2Q1 ≤0.12 ≤0.30 0.60 ~ 1.20 ≤0.030 ≤0.025 ≥0.020
6.1.2 finished steel sheet and strip chemical composition tolerances shall comply with the provisions of GB/T 222's.
6.2 smelting methods used in steel sheet and strip steel using oxygen
Gas smelting. 6.3 Delivery Status
After the cold-rolled steel sheet and strip 6.3.1 After annealing and smooth delivery.
6.3.2 usually coated steel sheet and strip oil supply, the film of oil should be used to remove an aqueous alkali solution. In conventional packaging, transportation, loading
By unloading and storage conditions, the supplier shall ensure that from the date of manufacture is completed within six months, the surface of the stainless steel sheet and strip. according to
The demand side, the agreement by both parties and specified in the contract, but also may not be coated with oil supply. For non-oiled product handling,
Storage and use of rust generated in the process, scratches and friction marks and other defects, the supplier shall not bear the responsibility for product quality.
Note. usually the product inspection document issued by the date fixed for the completion date of manufacture.
6.4 Mechanical Properties
6.4.1 for guarantees from the date of manufacture is completed within six months, the mechanical properties of the steel sheet and strip shall comply with the requirements of Table 5.
6.4.2 When the steel sheet and strip specified parts supplier, the supply and demand sides can agree on a mechanical part of the process to meet the demand
Performance range as the acceptance reference, this time, the mechanical properties specified in Table 5 will no longer be used as the basis for delivery.
6.4.3 due to aging, the mechanical properties of the steel sheet and strip with the extension of storage time will be deteriorated, such as yield strength
And the rise of the tensile strength, percentage elongation decreased formability deterioration appears tensile strain marks, etc., it is recommended to do
Early use.
table 5
Trademark
Tensile tests a, b
180 ° bending test
(B≥20mm) c Bend
Core diameter
Hardness values d
HRB
Yield Strength
MPa
tensile strength
MPa
The Elongation
A80mm
not less than
B320LW ≥210 320 ~ 410 28 0a -
B360LW ≥215 360 ~ 450 26 0a -
B440QZ ≥280 440 ~ 540 15 1a -
BMCP84 - - - - ≥84
B350JL 250 ~ 350 350 ~ 500 20 1a -
St12G ≤280 295 ~ 430 28 - -
St14J 180 ~ 220 280 ~ 370 39 - -
Stl2Q 215 ~ 285 320 ~ 390 32 - -
Stl2Q1 245 ~ 300 370 ~ 430 28 0.5a -
When using RP0.2 yield a clear no, otherwise use ReL.
b specimen of GB/sample, a sample of 228 T P6 direction to landscape.
ca represents the thickness of the sample to the longitudinal direction of the sample.
d hardness is the average of three experiments.
6.5 For grades BMCP84 strip, usually in the chilled state and oiled after delivery, the strip surface should be smooth, surface
Average roughness Ra≤O.70μm. As for the order to ensure, without performing average surface roughness test.
6.6 surface quality
Steel sheet and strip surface 6.6.1 There must be no holes, surface cracks, and other laminated on the use of harmful defects.
6.6.2 Each steel strip surface quality level characteristics and should meet the requirements in Table 6.
6.6.3 For steel, because there is no opportunity to cut with the defective portion, thus strip allowed defect delivery, but flawed
Shall not exceed 6% of the total length of each volume.
Table 6
Level code feature
More advanced surface finishing FB surface allows a small amount does not affect the formability and coating, plating adhesion defect, such as minor scratches, indentation, pitting, roll mark and oxidation tint like.
FC advanced surface finishing products in two faces better side no visible obvious defect, the other side should at least meet the requirements of the FB.
Premium surface finishing FD products two faces in a better side should not affect the quality or appearance after painting after plating appearance quality defect, the other side should at least reach FB requirements.
6.7 surface structure
Surface structure when Pock (D) by the average roughness Ra 0.6μm < Ra≤1.9μm control, surface structure shiny surface (B),
The average roughness Ra press Ra≤0.9μm control.
7 inspection and testing
7.1 steel sheet and strip appearance was visually inspected.
Size 7.2 steel sheet and strip, shape should be appropriate measurement tool.
7.3 tensile test shall be in accordance with GB/T 228.1 Method B. In order to improve the reproducibility of the measurement results, we recommend using the beam displacement
Control method, the yield strength measured rate of 5% Lc/min, as measured parallel to the tensile rate (Lc of the sample 40% Lc/min
length).
7.4 Acceptance steel sheet and strip shall grant each inspection lot shall be not more than 30 tons of the same grade, same size, same processing condition,
Steel sheet and strip components. For weighing more than 30 tons of steel, each composed of a coil inspection lot.
7.5 each batch of steel sheet and strip the test items, the number of samples, sampling methods, test methods shall be in accordance with Table 7.
7.6 The supplier may use different tests and test methods for acceptance testing. Event of a dispute, should present technical conditions of Regulation
Set of inspection and testing methods and related technical requirements for testing.
Table 7
Number of samples test items (a) Test Method for Sampling method
Chemical analysis 1/furnace GB/T 20066 GB/T 223, GB/T 4336, GB/T 20123, GB/T 20125, GB/T 20126
Tensile test 1/batch
GB/T 2975
GB/T 228.1 Method B
Bending test 1/batch GB/T 232
Hardness test 1/batch GB/T 230.1 Method B
Surface roughness - GB/T 2523
7.7 For tensile, hardness test, if the test results do not meet a particular supplier interim technical requirements, from the same
Batch and then either take double the number of samples that failed project reinspection. Retest results (including the required test project
All indicators) qualified, then the whole batch is qualified. Retest results (including all indicators of the project test required) even if there is a finger
Standard fail, then retest failed. As retest failed, already a test and the test results of a single piece of incompatibility can not acceptance, but
Batch material without making a single piece by piece test can resubmit testing and acceptance.
8 packaging, marking and inspection documents
Steel sheet and strip packaging, marking and inspection documents shall comply with Q/BQB 400's. For a party to have special packaging weight
Requirements should be specified in the contract.
9 numerical rounding rules
Numerical rounding rules should comply with GB/T 8170's.
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