1 Scope
This standard specifies terms and definitions, classification, requirements and rounding off of numerical values for surface condition of hot-rolled steel section.
This standard is applicable to general requirements of surface quality for rolled steel sections (hereinafter referred to as “sections”) such as hot-rolled H section, joist steel, channel steel, and angle steel etc.
2 Normative References
The following documents are essential to the application this document. For dated references, only the dated edition is applicable to this standard; for undated references, the latest edition (including all the amendments) applies. For the undated references, the latest editions of the normative documents (including all the amendments) apply.
YB/T 081 Rule for Rounding off of Numerical Values and Judgement of Testing Values for Technical Standards of Metallurgy.
3 Terms and Definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
imperfections
surface discontinuities, other than cracks, scar, delamination and tension fracture, with the depth and (or) area less than a specified limiting value
3.2
defects
cracks, scar, delamination and tension fracture, and surface discontinuities with the depth and (or) area less than a specified limiting value
4 Classification
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
5 Requirements
6 Numerical Rounding
1 Scope
This standard specifies terms and definitions, classification, requirements and rounding off of numerical values for surface condition of hot-rolled steel section.
This standard is applicable to general requirements of surface quality for rolled steel sections (hereinafter referred to as “sections”) such as hot-rolled H section, joist steel, channel steel, and angle steel etc.
2 Normative References
The following documents are essential to the application this document. For dated references, only the dated edition is applicable to this standard; for undated references, the latest edition (including all the amendments) applies. For the undated references, the latest editions of the normative documents (including all the amendments) apply.
YB/T 081 Rule for Rounding off of Numerical Values and Judgement of Testing Values for Technical Standards of Metallurgy.
3 Terms and Definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
imperfections
surface discontinuities, other than cracks, scar, delamination and tension fracture, with the depth and (or) area less than a specified limiting value
3.2
defects
cracks, scar, delamination and tension fracture, and surface discontinuities with the depth and (or) area less than a specified limiting value
4 Classification
Contents of YB/T 4427-2014
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
5 Requirements
6 Numerical Rounding
