GB/T 37430-2019 English PDF (GBT37430-2019)

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GB/T 37430-2019: High strength stainless structural steel for constructions
GB/T 37430-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.70
H 44
High Strength Stainless Structural
Steel for Constructions
ISSUED ON: MAY 10, 2019
IMPLEMENTED ON: APRIL 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative References ... 4 
3 Terms and Definitions ... 6 
4 Dimensions, Shape, Weight and Tolerances ... 6 
5 Technical Requirements ... 7 
6 Test Methods ... 9 
7 Inspection Rules ... 9 
8 Packaging, Marking and Quality Certificate ... 10 
Appendix A (informative) Typical Images of Metallographic Structure ... 11 
High Strength Stainless Structural
Steel for Constructions
1 Scope
This Standard stipulates the terms, definitions, dimensions, shape and weight
tolerances, technical requirements, test methods, inspection rules, packaging, marking
and quality certificate of high strength stainless structural steel for constructions.
This Standard is applicable to 12Cr13Ni2 high strength stainless structural steel plates
(or steel strips), section steel and steel rods (hereinafter referred to as stainless steel)
for constructions.
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 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Diantipyryl Methane Phosphomolybdate Gravimetric Method for the Determination
of Phosphorous Content
GB/T 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon
Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual
Titration or Potentiometric Titration Method
GB/T 223.23 Iron, Steel and Alloy - Determination of Nickel Content - The
Dimethylglyoxime Spectrophotometric Method
GB/T 223.25 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Dimethylglyoxime Gravimetric Method for the Determination of Nickel Content
GB/T 223.58 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Arsenite-sodium Nitrite Titrimetric Method for the Determination of Manganese
Content
GB/T 223.59 Iron, Steel and Alloy - Determination of Phosphorus Content -
Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony
GB/T 709 Dimension, Shape, Weight and Tolerance for Hot-rolled Steel Strip,
Plate and Sheet
GB/T 2101 General Requirement of Acceptance, Packaging, Marking and
Certification for Section Steel
GB/T 2975 Steel and Steel Products - Location and Preparation of Samples and
Test Pieces for Mechanical Testing
GB/T 4237 Hot Rolled Stainless Steel Plate, Sheet and Strip
GB/T 10561 Steel - Determination of Content of Nonmetallic Inclusions -
Micrographic Method Using Standards Diagrams
GB/T 11170 Stainless Steel - Determination of Multi-element Contents - Spark
Discharge Atomic Emission Spectrometric Method (routine method)
GB/T 11263 Hot-rolled H and Cut T Section Steel
GB/T 13298 Inspection Methods of Microstructure for Metals
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the
Determination of Chemical Composition
YB/T 081 Rule for Rounding-off of Numerical Values and Judgement of Testing
Values for Technical Standards of Metallurgy
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 High Strength Stainless Structural Steel for Constructions
High strength stainless structural steel for constructions refers to steel for architecture
structural engineering, which takes stainless and anti-corrosion as the main
characteristic; and complies with following stipulations: non-proportional extension
strength shall be not lower than 600 MPa, carbon content shall be not more than 0.16%,
chromium content shall be not less than 12.5%, metallographic structure shall be
tempered sorbite.
4 Dimensions, Shape, Weight and Tolerances
The dimensions, shape, weight and tolerances of hot-rolled steel bars shall
respectively comply with relevant stipulations in GB/T 702.
The dimensions, shape, weight and tolerances of hot-rolled steel plates shall
Stainless steel shall receive acceptance check in batches. Each batch shall be
constituted of steel materials of the same furnace No., the same dimensions and the
same delivery state.
7.3 Re-inspection and Determination
The re-inspection and determination of stainless steel shall comply with GB/T 247 or
GB/T 2101.
7.4 Rounding-off of Numerical Value
The rounding-off of numerical value in the inspection result shall comply with the
stipulations in YB/T 081.
8 Packaging, Marking and Quality Certificate
The packaging, marking and quality certificate of stainless steel shall comply with the
stipulations in GB/T 247 or GB/T 2101.