Dimension, shape, weight and tolerances for continuously hot-rolled steel sheet and strip
1 Scope
This standard specifies the dimension, shape, weight and tolerances for continuously hot-rolled steel sheet and strip.
This standard is applicable to the continuously hot-rolled steel strip as well as the steel sheet cut horizontally from strip and the slit wide strip cut vertically therefrom (hereinafter referred to as steel sheet and strip) produced by Baoshan Iron & Steel Co., Ltd.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
3 Classifications and symbols
3.1 By edge condition:
Cut edge (EC)
Mill edge (EM)
3.2 By thickness precision:
Common thickness precision (PT.A)
Higher thickness precision (PT.B)
Advanced thickness precision (PT.C)
3.3 The EM steel sheets and strips are classified as follows according to width precision:
Common width precision (PW.A)
Higher width precision (PW.B)
3.4 The steel sheets are classified as follows according to flatness precision:
Common flatness precision (PF.A)
Higher flatness precision (PF.B)
Foreword i 1 Scope 2 Normative references 3 Classifications and symbols 4 Dimension 5 Dimensional tolerance 6 Shape 7 Measurement of dimension and shape 8 Weight 9 Rules of rounding off for numerical values Annex A (Normative) Weight calculation method for theoretical weighing
Dimension, shape, weight and tolerances for continuously hot-rolled steel sheet and strip
1 Scope
This standard specifies the dimension, shape, weight and tolerances for continuously hot-rolled steel sheet and strip.
This standard is applicable to the continuously hot-rolled steel strip as well as the steel sheet cut horizontally from strip and the slit wide strip cut vertically therefrom (hereinafter referred to as steel sheet and strip) produced by Baoshan Iron & Steel Co., Ltd.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
3 Classifications and symbols
3.1 By edge condition:
Cut edge (EC)
Mill edge (EM)
3.2 By thickness precision:
Common thickness precision (PT.A)
Higher thickness precision (PT.B)
Advanced thickness precision (PT.C)
3.3 The EM steel sheets and strips are classified as follows according to width precision:
Common width precision (PW.A)
Higher width precision (PW.B)
3.4 The steel sheets are classified as follows according to flatness precision:
Common flatness precision (PF.A)
Higher flatness precision (PF.B)
Contents of Q/BQB 301-2019
Foreword i
1 Scope
2 Normative references
3 Classifications and symbols
4 Dimension
5 Dimensional tolerance
6 Shape
7 Measurement of dimension and shape
8 Weight
9 Rules of rounding off for numerical values
Annex A (Normative) Weight calculation method for theoretical weighing
