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Q/BQB 302-2018 English PDF (QBQB302-2018)

Q/BQB 302-2018 English PDF (QBQB302-2018)

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Q/BQB 302-2018: Continuously hot-rolled steel sheet and strip for cold forming

The contents specified in Q/BQB 302-2018 Continuously Hot-Rolled Steel Sheet and Strip for Cold Forming, which is prepared and published by our company, comply with the requirements of relevant national laws and regulations, mandatory standards, and relevant industrial policies; are approved to be published 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; the standard number is clearly indicated on the package of corresponding product. Our company is responsible for the truthfulness, accuracy and legality of the public information in the self-commitment; assumes full legal responsibility for the consequences of the implementation of this Standard.
Q/BQB 302-2018
ENTERPRISE STANDARD OF BAOSTEEL
Continuously Hot-Rolled Steel
Sheet and Strip for Cold Forming
Issued on: February 07, 2018
Issued by: Baoshan Iron and Steel Co., Ltd.
Table of Contents
Self-Commitment ... 3
Technical Indicator 1 ... 4
Document for Indicator Requirements of Technical Indicator 1 ... 5
Self-Commitment
The contents specified in Q/BQB 302-2018 Continuously Hot-Rolled Steel Sheet and Strip for Cold Forming, which is prepared and published by our company, comply with the requirements of relevant national laws and regulations, mandatory standards, and relevant industrial policies; are approved to be published 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; the standard number is clearly indicated on the package of corresponding product. Our company is responsible for the truthfulness, accuracy and legality of the public information in the self-commitment; assumes full legal responsibility for the consequences of the implementation of this Standard.
Baoshan Iron and Steel Co., Ltd.
February 07, 2018
Document for Indicator Requirements of Technical
Indicator 1
1 Size, Shape, Weight and Permissible Deviation
The size, shape, weight and permissible deviation of steel sheet and strip shall conform to the provisions of Q/BQB 301; thereof, the permissible deviation of thickness shall conform to the provisions of Table 2 in Q/BQB 301; the allowable value of unevenness shall not conform to the provisions of the minimum yield strength no greater than 300MPa. If the purchaser has higher requirements for the thickness accuracy, the advanced accuracy PT.C with specified yield strength, Re, less than 360MPa given in Table 4 of Q/BQB 301.
2 Technical Requirements
Table 2
Designation Chemical composition
a, b (mass fraction) / %
a it shall be selected by the supplier, and the special elements may be added. b Content of residual elements in steel, such as Cu???0.20%, Cr???0.15%, Ni???0.15%. However, under the guarantee of the supplier, the chemical analysis on these elements may not be conducted.
c When thickness t>14mm, the upper limit for content of Mn may be improved to 0.50%.

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