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GB/T 38347-2019 English PDF (GBT38347-2019)

GB/T 38347-2019 English PDF (GBT38347-2019)

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GB/T 38347-2019: Hot-rolled wire rod of ultra-low carbon steel with high boron

This Standard stipulates the designation representation method, order content, dimensions, appearances, weights, allowable deviations, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of hot-rolled wire rod of ultra-low carbon steel with high boron.
GB/T 38347-2019
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.60
H 49
Hot-rolled Wire Rod of Ultra-low Carbon Steel with
High Boron
ISSUED ON: DECEMBER 10, 2019
IMPLEMENTED ON: JULY 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Designation Representation Method ... 6
4 Order Content ... 6
5 Dimensions, Appearances, Weights and Allowable Deviations ... 7
6 Technical Requirements ... 7
7 Test Methods ... 9
8 Inspection Rules ... 10
9 Packaging, Marking and Quality Certificate ... 11
Appendix A (informative) Purposes of Different Designations of Ultra-low Carbon Steel with High Boron ... 12
Hot-rolled Wire Rod of Ultra-low Carbon Steel with
High Boron
1 Scope
This Standard stipulates the designation representation method, order content, dimensions, appearances, weights, allowable deviations, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of hot-rolled wire rod of ultra-low carbon steel with high boron.
This Standard is applicable to hot-rolled wire rod of ultra-low carbon steel with high boron with the diameter of 3 mm ~ 60 mm (hereinafter referred to as wire rod). 2 Normative References
The following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products GB/T 223.4 Alloyed Steel - Determination of Manganese Content - Potentiometric or Visual Titration Method
GB/T 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.9 Iron Steel and Alloy - Determination of Aluminum Content - Chrome Azurol S Photometric Method
GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method
GB/T 223.37 Methods for Chemical Analysis of Iron, Steel and Alloy - The Indophenol Blue Photometric Method for the Determination of Nitrogen Content after Distillation Separation
GB/T 223.59 Iron, Steel and Alloy - Determination of Phosphorus Content - Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony
Phosphomolybdate Blue Spectrophotometric Method
GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium (potassium) Periodate Photometric Method for the Determination of Manganese Conductimetric Method after Fusion in a Current of Inert Gas
GB/T 20125 Low-alloy Steel - Determination of Multi-element Contents - Inductively Coupled Plasma Atomic Emission Spectrometric Method
GB/T 20126 Unalloyed Steel - Determination of Low Carbon Content - Part 2: Infrared Absorption Method after Combustion in an Induction Furnace (with preheating) GB/T 22368 Low-alloy Steel - Determination of Multi-element Contents - Glow Discharge Optical Emission Spectrometry (routine method)
YB/T 081 Rule for Rounding Off of Numerical Values and Judgement of Testing Values for Technical Standards of Metallurgy
3 Designation Representation Method
The designations of wire rod are: CH1B, CH3B, CH5B, BP05, BP05D. See the specific meaning below:
CH1B:
---C represents ?€?carbon?€?;
---H represents the initials of ?€?high?€?;
---B represents ?€?boron?€?;
---1 represents one in ten thousand of carbon content.
BP05D:
---BP represents the initials of ?€?blasting?€?;
---05 represents five in ten thousand of carbon content;
---D represents the initials of ?€?electric?€?.
Please refer to Appendix A for the purposes of each designation of steel. 4 Order Content
Order content, which shall be explicitly indicated in the contract, includes: a) Serial No. of this Standard;
b) Product name;

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