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Q/BQB 315-2023: Continuously hot-rolled steel sheet and strip for hot-stamping press hardening
Q/BQB 315: Evolution and historical versions
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| Q/BQB 315-2023 | English | 459 |
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Continuously hot-rolled steel sheet and strip for hot-stamping press hardening
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| Q/BQB 315-2018 | English | 90 |
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Hot rolled steel sheet and strip for hot stamping
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Standard similar to Q/BQB 315-2023
HJ 1322 | NMPA RULES66 | Q/BQB 311 | Q/BQB 310 | Basic data
| Standard ID | Q/BQB 315-2023 (Q/BQB315-2023) |
| Description (Translated English) | Continuously hot-rolled steel sheet and strip for hot-stamping press hardening |
| Sector / Industry | Chinese Industry Standard |
| Classification of Chinese Standard | QBQ |
| Word Count Estimation | 13,152 |
| Date of Issue | 2023-04-09 |
| Date of Implementation | 2023-07-01 |
| Issuing agency(ies) | Baoshan Iron & Steel Co., Ltd. |
Q/BQB 315-2018: Hot rolled steel sheet and strip for hot stamping
---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.
(Hot rolled steel sheet and strip for hot stamping)
Baoshan Iron and Steel Co., Ltd. Enterprise Standard
Hot rolled steel sheet and strip for hot stamping
Published on.2018-02-07
Baoshan Iron and Steel Co., Ltd. released
Self-commitment
Relevant laws and regulations, mandatory standards and related industrial policies, and approved by the legal representative of the enterprise in accordance with the prescribed procedures
The products produced by our company meet the technical requirements stipulated in this standard, and the standard number is clearly indicated on the corresponding product packaging. My company
Responsible for the truthfulness, accuracy and legality of the public information of the statement, and assume full legal responsibility for the consequences of the implementation of this standard.
Baoshan Iron and Steel Co., Ltd.
2018-02-07
Technical indicator 1
Indicator name. Main technical indicators such as composition and performance
Indicator requirements. The main technical indicators and test methods such as composition and performance are shown in the attached file.
(See page 4 for details)
1 Dimensions, shape, weight and tolerance
The dimensions, shape, weight and tolerance of steel plates and strips shall be in accordance with Q/BQB 301. If you want to have higher thickness accuracy
When ordering, you can select the advanced precision PT.C given in Table 4 of Q/BQB 301 when ordering.
2 Technical requirements
Table 2
Brand
Chemical composition a (melting analysis) %
C Si Mn PS Alt BN Cr Ti Mo
BR1200HS 0.15～0.22
0.40
1.00~
1.40
0.025
0.010
0.01~
0.06
0.005
0.008
0.35
0.01~
0.05
0.35
BR1500HS 0.20~0.25
0.40
1.00~
1.40
0.025
0.010
0.01~
0.06
0.005
0.008
0.35
0.02~
0.05
0.35
a Microalloying elements such as Nb can be added.
table 3
Brand
Tensile test a, b
Lower yield strength
MPa
tensile strength
MPa
Elongation after break
A50mm %
BR1200HS ≥280 ≤700 ≥18
BR1500HS 320～630 420～800 ≥15
a Rp0.2 is used when the yielding phenomenon is not obvious.
b The sample is the No. 5 sample specified in JIS Z 2241, and the sample direction is horizontal.
3 Inspection and testing
table 5
Number of test items (s) Sample method Test method
Chemical analysis a 1/furnace GB/T.20066 GB/T 223, GB/T 4336, GB/T.20123, GB/T.20124, GB/T.20125 or general method
Tensile test 1/batch GB/T 2975 GB/T 228.1
a When conducting an arbitration test on chemical composition, it shall be carried out in accordance with the provisions of GB/T 223.
Indicator requirements document for Technical Indicator 1
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Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version Q/BQB 315-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.