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Martensitic High Strength Cold Rolled Steel Plate and Strip
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Q/BQB 415-2009
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Basic data | Standard_ID | Q/BQB 415-2009 (Q/BQB415-2009; QBQB 415-2009; QBQB415-2009) | | Description (Translated English) | Martensitic High Strength Cold Rolled Steel Plate and Strip | | Sector / Industry | Chinese Industry Standard | | Word Count Estimation | 4,000 | | Drafting Organization | BaoSteel Group | | Administrative Organization | BaoSteel Group | Q/BQB 415-2009: Martensitic High Strength Cold Rolled Steel Plate and Strip---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.
Martensitic High Strength Cold Rolled Steel Plate and Strip
Baoshan Iron & Steel Co., Ltd. Enterprise Standard
Martensite cold rolled high strength steel sheet and strip
1 Scope
This standard specifies the terms and definitions martensite cold rolled high strength steel sheet and strip, classification and code, size, shape, weight
Quantity, technical requirements, inspection and testing, packaging, marking and inspection documents.
This standard applies to Baoshan Iron & Steel Co., Ltd. manufactures a thickness of 0.50mm ~ 2.1mm martensitic high strength cold strip
Rolled 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
GB/T 4336-2002 carbon steel and low alloy steel spark source atomic emission spectrometry methods (conventional
law)
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 martensitic steels martensitic steels (MS)
Almost all the microstructure of the steel martensite, martensitic steel having high tensile strength, typically 1000MPa
the above. Martensite steels generally need to be tempered to improve its plasticity, so that at such high strength, has a sufficient
Formability.
4 Classification and designation
4.1 steel sheet and strip by use distinction should meet the requirements of Table 1.
Table 1
Trademark use
HC500/780MS
HC700/900MS
HC700/980MS
HC860/1100MS
HC950/1180MS
HC1030/1300MS
HC1150/1400MS
HC1200/1500MS
Stiffener, crash parts
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
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) the level of surface quality;
g) packaging;
h) use;
i) Other.
5.2 If the contract does not indicate the size of the order and precision flatness, surface quality level, the edge state and packaging, then this
Common standard products according to size and flatness accuracy, trimming or trimming strip steel supplier FB-grade surface quality for the press
Provided by 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) shall meet the requirements of Table 3.
table 3
Chemical composition of a (Heat analysis)% (mass fraction)
Grade C
no greater than
Si
no greater than
Mn
no greater than
no greater than
no greater than
Alt
not less than
HC500/780MS
HC700/900MS
HC700/980MS
HC860/1100MS
HC950/1180MS
HC1030/1300MS
HC1150/1400MS
HC1200/1500MS
2.2 3.0 0.30 0.020 0.025 0.010
a permit to add other alloying elements, but Ni Cr Mo≤1.5%, Cu < 0.20%.
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 cold-rolled steel sheet and strip, after quenching and tempering 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 the production from the date of manufacture is completed within six months, the surface of the stainless steel sheet and strip.
According to the requirements, and agreement by both sides in the contract, but also may not be coated with oil supply.
7.4 Mechanical Properties
Mechanical properties of the steel sheet and strip shall comply with the requirements of Table 4.
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Table 4
Tensile tests a, b
Grade Yield Strength
RP0.2
MPa
tensile strength
Rm
MPa
not less than
The Elongation
A80mm
not less than
HC500/780MS 500 ~ 700 780 3
HC700/900MS 700 ~ 1000 900 2
HC700/980MS 700 ~ 960 980 2
HC860/1100MS 860 ~ 1100 1100 2
HC950/1180MS 950 ~ 1200 1180 2
HC1030/1300MS 1030 ~ 1300 1300 2
HC1150/1400MS 1150 ~ 1400 1400 2
HC1200/1500MS 1200 ~ 1500 1500 2
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.
7.5 surface quality
7.5.1 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.
7.5.2 Each steel strip surface quality level characteristics and should meet the requirements of Table 5.
table 5
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 stains and other.
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.
7.5.3 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.
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.
8.3 Acceptance steel sheet and strip shall grant each inspection lot shall be not more than 30 tons of the same grade, same size, same heat treatment system
The composition of the steel sheet and strip for significant volumes to 30 tons steel, each volume can be used as a test batch.
8.4 each batch of steel sheet and strip the test items, the number of samples, sampling methods, test methods and sampling should be directed in accordance with Table 6
Provisions.
8.5 For the tensile test, the test results if an item does not meet the standard requirements, from the same batch and then either take double the amount of
Sample retest the failed project. Retest results (including all indicators of the project test required) qualified, the entire
Batch qualified. Retest results (including all indicators of the project test required) even if there is an indicator of failure, then do not retest
qualified. As retest failed, already a test and the test results can not be incompatible single acceptance, but without making the batch of test material
One-piece by piece to resubmit testing and acceptance.
Table 6
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
9 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
Seeking, should be specified in the contract.
10 numerical rounding rules
Numerical rounding rules should comply with GB/T 8170's.
11 grades approximation 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
415-2009
SAE
J2340-1999
SAE
J2745-2007
GMW
3399-2008
HC500/780MS 800 M - CR 780T/500Y-MS
HC700/900MS 900 M MS 900T/700Y CR 900T/700Y-MS
HC700/980MS 1000 M - CR 980T/700Y-MS
HC860/1100MS 1100 M MS 1100T/860Y CR 1100T/860Y-MS
HC950/1180MS 1200 M - -
HC1030/1300MS 1300 M MS 1300T/1030Y CR 1300T/1030Y-MS
HC1150/1400MS 1400 M - -
HC1200/1500MS 1500 M MS 1500T/1200Y CR 1500T/1200Y-MS
Additional information.
The reference standard SAE J2745-2007, SAE J2340-1999, GMW3399-2008 establishment.
Appendix A of this standard is an informative annex.
The standard proposed by Baoshan Iron & Steel Co., Ltd. of technical quality.
This standard was drafted by the Baoshan Iron and Steel Co., Ltd. of technical quality.
Sun Zhongming drafters of this standard.
This standard is the first release.
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