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High-strength Cold Rolled Steel Plate and Strip without Interstitial
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Q/BQB 413-2009
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PDF similar to Q/BQB 413-2009
Basic data | Standard_ID | Q/BQB 413-2009 (Q/BQB413-2009; QBQB 413-2009; QBQB413-2009) | | Description (Translated English) | High-strength Cold Rolled Steel Plate and Strip without Interstitial | | Sector / Industry | Chinese Industry Standard | | Word Count Estimation | 5,000 | | Drafting Organization | BaoSteel Group | | Administrative Organization | BaoSteel Group | Q/BQB 413-2009: High-strength Cold Rolled Steel Plate and Strip without Interstitial---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.
High-strength Cold Rolled Steel Plate and Strip without Interstitial
Baoshan Iron & Steel Co., Ltd. Enterprise Standard
Interstitial cold rolled high strength steel sheet and strip
Partial replacement of Q/BQB 411-2003
1 Scope
This standard specifies the terms and definitions interstitial cold rolled high strength steel sheet and strip, classification and code, size, shape,
Weight, technical requirements, inspection and testing, packaging, marking and quality certificate.
This standard applies to Baoshan Iron & Steel Co., Ltd. manufactures a thickness of 0.50mm ~ 2.5mm of interstitial free high strength
The cold rolling steel sheet and strip (hereinafter referred to as steel sheet and strip).
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
All amendments (not including errata content) or revisions do not apply to this standard, however, encourage up according to the standard
Research into whether the parties to the agreement to use the latest versions of these documents. For undated references, the latest edition
Apply to this standard.
GB/T 222-2006 finished steel chemical composition and permissible variations
GB/T 223 steel and alloy chemical analysis method
GB/T 228-2002 metallic materials at room temperature tensile test method
GB/T 2975-1998 steel and steel products for mechanical testing and sample preparation position
Methods of measurement GB/T 2523-2008 cold-rolled sheet metal (with) the surface roughness and peak number of
GB/T 4336-2002 carbon steel and low alloy steel spark source atomic emission spectrometry method (conventional method)
GB/T 5027-2007 Metallic materials - Sheet and strip plastic strain ratio (r value) Determination
Determination of GB/T 5028-2008 Metallic materials - Sheet and strip tensile strain hardening exponent (n value)
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 (often
Conventional methods)
GB/T 20125-2006 Determination of low-alloy steel by inductively coupled plasma atomic emission multi-element content
Spectrometry
GB/T 20126-2006 Determination of non-alloy steel of low carbon content - Part 2. induction furnace (preheated)
After the internal combustion infrared absorption method
Q/BQB 400 cold-rolled products, packaging, labeling and inspection documents
Size Q/BQB 401 cold rolling steel sheet and strip, shape, weight and tolerance
3 Terms and Definitions
3.1 interstitial free high strength steel high strength interstitial free steels (Y)
By controlling the chemical composition of the steel improving steel plastic strain ratio (r values) and strain hardening exponent (n value). Because steel
Solid solution strengthening elements and microstructure of interstitial free, which has both high strength steel, but also has a very good cold formability
Energy, usually used to make complex parts require deep drawing.
4 Classification and designation
4.1 steel sheet and strip by use distinction should meet the requirements of Table 1.
Table 1
Grades Recommended use
HC180Y
B170P1
Stamping or deep drawing
HC220Y
B210P1
General use or stamping
HC260Y
B250P1
Structural or general use
4.2 steel sheet and strip by surface quality distinction should meet the requirements of Table 2.
Baoshan Iron & Steel Co. 2009-01-08 Posted 2009-06-30 before implementation
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Table 2
Level code
More advanced surface finishing FB
Advanced surface finishing FC
Premium surface finishing FD
4.3 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
5 Ordering information required
5.1 users should provide the following information when ordering.
a) Product Name (steel or steel);
b) The product standards;
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) Purpose;
j) Other.
5.2 If the contract does not indicate the size of the order and precision of flatness, surface structure, surface quality level packaging edge state and party
Style, then this product in the usual standard size and flatness accuracy, surface structure of the surface Ma, FB-class surface quality trimming steel
Steel belt and trimming supplier, according to the supplier to provide the packaging packaging.
6 size, shape, weight and tolerance
Steel sheet and strip size, shape, weight and tolerances shall comply with the provisions of Q/BQB 401's.
7 Technical Requirements
7.1 Chemical composition
7.1.1 chemical composition of steel (melting analysis) should meet the requirements of Table 4.
Table 4
Chemical composition (Heat analysis)% (mass fraction) Grade
C Mn PS Alt Ti
B170P1 ≤0.006 ≤1.00 ≤0.08 ≤0.025 ≥0.015 ≤0.20 a
B210P1 ≤0.008 ≤1.20 ≤0.10 ≤0.025 ≥0.015 ≤0.20 a
B250P1 ≤0.008 ≤1.20 ≤0.12 ≤0.025 ≥0.015 ≤0.20 a
HC180Y ≤0.01 ≤0.80 ≤0.08 ≤0.025 ≥0.010 ≤0.12 b
HC220Y ≤0.01 ≤1.40 ≤0.10 ≤0.025 ≥0.010 ≤0.12 b
HC260Y ≤0.01 ≤2.00 ≤0.12 ≤0.025 ≥0.010 ≤0.12 b
Nb allows a partial or total substitute Ti, at this time the total content of Nb and/or Ti should not exceed 0.20%.
b allows Nb replace some or all Ti, at this time the total content of Nb and/or Ti should not exceed 0.12%.
7.1.2 finished steel sheet and strip chemical composition tolerances shall comply with the provisions of GB/T 222's.
7.2 Melting Method
Steel sheet and strip steel using oxygen used in smelting.
7.3 Delivery Status
7.3.1 After the steel sheet and strip cold rolling after annealing and smooth delivery.
7.3.2 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. As needed
Request, by mutual agreement and supply and demand in the contract, but also may not be coated with oil supply.
7.4 Mechanical Properties
7.4.1 for guarantees from the date of manufacture within six months of completion of the mechanical properties of the steel sheet and strip shall be in accordance with Table 5 and Table 6
Provisions.
7.4.2 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
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The rise and fall of tensile strength, percentage elongation, formability deteriorates, marks and other tensile strain occurs, it is recommended as soon as possible
use.
table 5
Tensile tests a, b
The Elongation
(Lo = 50mm, b = 25mm)
not less than
Nominal thickness mm
Grade Yield Strength
MPa
tensile strength
MPa
not less than
< 1.0 1.0 ~ < 1.6 ≥1.6
r90c
not less than
n90
not less than
B170P1 170 ~ 260 340 36 38 40 1.7 0.19
B210P1 210 ~ 310 390 32 34 36 1.6 0.18
B250P1 250 ~ 360 440 30 32 34 - -
When using a yield RP0.2 when not obvious, otherwise use ReL.
b specimen of GB/sample, a sample of 228 T P14 direction to landscape.
When c thickness greater than 2.0 mm, r90 value allows to reduce 0.2.
Table 6
Tensile tests a, b, c
Grade Yield Strength
MPa
tensile strength
MPa
not less than
The Elongation
A80mm
not less than
r90d
not less than
n90
not less than
HC180Y 180 ~ 240 340 34 1.7 0.19
HC220Y 220 ~ 280 360 32 1.5 0.17
HC260Y 260 ~ 320 380 28 - -
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.
When c is not greater than the thickness of 0.70mm, the Elongation allow reduced by 2%.
When d is greater than the thickness of 2.0mm, r90 value allows to reduce 0.2.
7.5 tensile strain mark
Storage conditions at room temperature, the surface quality requirements for the FC and FD steel sheet and strip, make sure that the date of the completion of the manufacture
Tensile strain mark does not appear when you use within six months.
7.6 surface quality
7.6.1 steel sheet and strip surface may not have scars, cracks, inclusions and other use of harmful defects, steel sheet and strip not be partakers
Floor.
7.6.2 Each steel strip surface quality level characteristics and should meet the requirements in Table 7.
7.6.3 For steel, because there is no opportunity to cut with the defective portion, thus strip allowed defect delivery, but the defective unit
Points not more than 6% of the total length of each volume.
Table 7
Level code feature
More advanced surface finishing FB surface allows a small amount does not affect the moldability and coating, plating adhesion defects, 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 must reach at least the requirements of FB.
Premium surface finishing FD products in two faces better side without any defect, that can not affect the appearance of the quality of appearance quality after painting or after plating, the other side must reach at least the requirements of FB.
7.7 surface structure
Surface structure when Pock (D) by the average roughness Ra 0.6μm < Ra≤1.9μm control, surface structure light table
When the surface (B) average roughness Ra press Ra≤0.9μm control.
8 inspection and testing
8.1 steel sheet and strip appearance was visually inspected.
Size 8.2 steel sheet and strip, shape using the appropriate measurement tool.
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8.3 r value at 15% strain is calculated, when the uniform elongation is less than 15%, the uniform elongation strain value by the end of the
Calculated. The value of n is in the 10% to 20% strain range is calculated with the uniform elongation should be less than 20%, the calculated
Variable range of 10% to the end of the uniform elongation.
8.4 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 status
The composition of steel sheet and strip for significant volumes to 30 tons steel, each volume can be used as a test batch.
8.5 each batch of steel sheet and strip the test items, the number of samples, sampling methods, test methods shall comply with the requirements in Table 8.
Table 8
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 228
Plastic strain ratio (r) 1/batch GB/T 5027
Strain hardening exponent (n) 1/batch GB/T 5028
Surface roughness-
GB/T 2975
GB/T 2523
8.6 For tensile plastic strain ratio (r value), the strain hardening index (n value), a particular test results do not meet the criteria for a
Seek, from the same batch and then either take double the number of samples that failed project reinspection. Retest results (including the project
All index test required) qualified, then the whole batch is qualified. Retest results (including all indicators of the project test required)
Even if there is an indication of failure, then retest failed. As retest failed, already a test and the test results of a single piece of substandard
Not acceptance, but without making a single batch of material test piece by piece may resubmit testing and acceptance.
9 packaging, marking and quality certificate
Steel sheet and strip packaging, marking and quality certificate shall comply with Q/BQB 400's. For a party to have the weight of the packaging
Special requirements should be specified in the contract.
10 numerical rounding rules
Numerical rounding rules should comply with GB/T 8170's.
Approximately 11 domestic and foreign brands control
The Standard Grade and Standard Grade abroad approximate comparison in Appendix A.
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Appendix A
(Informative)
The Standard Grade and Standard Grade abroad approximate table
Table A.1
Q/BQB
413-2009
GB/T
20564.3-2007
EN
10268.2006
SAE
J2340-1999
JFS A
2001.1998
Q/BQB
411-2003
B170P1 - - - JSC340P B170P1
B210P1 - - - JSC390P B210P1
B250P1 - - - JSC440P B250P1
HC180Y CR180IF HC180Y 180AT - -
HC220Y CR220IF HC220Y 210AT - -
HC260Y CR260IF HC260Y 250AT - -
Additional information.
The reference standard EN10268.2006, JFS A 2001.1998 establishment.
The partial replacement of standard Q/BQB 411-2003.
This standard is compared with Q/BQB 411-2003, the main changes are as follows.
⎯ added HC180Y, HC220Y, HC260Y grades and corresponding technical content;
The standard proposed by Baoshan Iron & Steel Co., the Department of technical quality management.
This standard was drafted by the Baoshan Iron and Steel Co., the Department of technical quality management.
Drafters of this standard painted woods.
This standard is the first release.
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