GB/T 37601-2019 PDF in English
GB/T 37601-2019 (GB/T37601-2019, GBT 37601-2019, GBT37601-2019)
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Hot rolled steel sheet and strip of alloy structure steel
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GB/T 37601-2019: PDF in English (GBT 37601-2019) GB/T 37601-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Hot rolled steel sheet and strip of alloy structure steel
ISSUED ON: JUNE 04, 2019
IMPLEMENTED ON: MAY 01, 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 Classification and code ... 6
4 Ordering contents ... 7
5 Dimension, shape, weight ... 7
6 Technical requirements ... 8
7 Test methods ... 16
8 Inspection rules ... 16
9 Packaging, marking and quality certificate ... 17
Annex A (Normative) Dimension, shape, weight and allowable deviation of
narrow steel strips and shear steel sheets ... 18
Annex B (Informative) Table of comparison of similar designations in relevant
standards ... 21
Hot rolled steel sheet and strip of alloy structure steel
1 Scope
This Standard specifies the classification and code, order contents, dimension,
shape, weight, technical requirements, test methods, inspection rules,
packaging, marking and quality certificate of hot rolled steel sheets and strips
of alloy structure steel.
This Standard is applicable to hot rolled steel sheets and strips of alloy structure
steel with a thickness of not more than 25.4 mm, including continuous hot rolled
wide strips, sheared steel sheets and slit steel strips with a width of not less
than 600 mm, and continuous hot rolled narrow steel strips and shear steel
sheets with a width of less than 600 mm (hereinafter referred to as steel sheets
and strips).
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 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 aluminium 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 223.13 Methods for chemical analysis of iron, steel and alloy - The
ammonium ferrous sulfate titration method for the determination of vanadium
content
GB/T 223.16 Methods for chemical analysis of iron, steel and alloy - The
chromotropic acid photometric method for the determination of titanium
content
GB/T 223.18 Methods for chemical analysis of iron, steel and alloy - The
sodium thiosulfate separation iodometric method for the determination of
copper content
GB/T 223.23 Iron, steel and alloy - Determination of nickel content - The
dimethylglyoxime spectrophotometric method
GB/T 223.26 Iron, steel and alloy - Determination of molybdenum content -
The thiocyanate spectrophotometric method
GB/T 223.43 Iron, steel and alloy - Determination of tungsten content -
Gravimetric method and spectrophotometric method
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 223.60 Methods for chemical analysis of iron, steel and alloy - The
perchloric acid dehydration gravimetric method for the determination of
silicon content
GB/T 223.67 Iron, steel and alloy - Determination of sulfur content -
Methylene blue spectrophotometric method
GB/T 223.69 Iron, steel and alloy - Determination of carbon contents - Gas-
volumetric method after combustion in the pipe furnace
GB/T 223.75 Iron, steel and alloy - Determination of boron content - Methanol
distillation-curcumin photometric method
GB/T 224 Determination of depth of decarburization of steels
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at
room temperature
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 247 General rule of package, mark and certification for steel plates
(sheets) and strips
GB/T 709 Dimension, shape, weight and tolerances for hot-rolled steel plates
and sheets
GB/T 2975 Steel and steel products - Location and preparation of test pieces
for mechanical testing
strips shall comply with the provisions of GB/T 709.
5.1.2 The thickness allowable deviation is implemented according to the
thickness allowable deviation of steel strips (including continuous rolled steel
sheets) with minimum yield strength Re greater than 360 MPa as specified in
GB/T 709.
5.1.3 The flatness is agreed upon between the supply and demand parties and
indicated in the contract.
5.1.4 Agreed upon between the supply and demand parties, steel of other
dimensions, shapes and allowable deviations may be supplied.
5.2 Narrow steel strips and shear steel sheets
The dimension, shape, weight and allowable deviation of narrow steel strips
and shear steel sheets shall comply with the provisions of Annex A.
6 Technical requirements
6.1 Designation and chemical composition
6.1.1 The designation and chemical composition of steel (melting analysis)
shall comply with the provisions of Table 1. See Annex B for the comparison of
similar designations with relevant standards.
6.1.2 When Cr, Ni, Cu and Mo in steel are taken as residual elements, the Cr,
Ni and Cu contents shall not exceed 0.30 % respectively and the Mo content
shall not exceed 0.10 %. If it can be guaranteed by the supply party, the analysis
may be exempted.
6.1.3 The P content in steel shall not exceed 0.030 %, and the S content shall
not exceed 0.020 %.
6.1.4 The allowable deviation of chemical composition of finished steel sheets
and strips shall comply with the provisions of GB/T 222.
6.1.5 Agreed upon between the supply and demand parties, the supply party
may provide other designations other than those specified in Table 1. The
designations and chemical composition shall comply with the provisions of
GB/T 3077.
the provisions of Table 3. If the demand party has a higher level requirement,
the qualification level shall be determined by agreement between the supply
and demand parties.
Table 3 -- Non-metallic inclusions
Class A Class B Class C Class D
Thin series Thick series Thin series Thick series Thin series Thick series Thin series Thick series
2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
6.8 Surface quality
6.8.1 The surface of steel sheets and strips shall be free of cracks, blisters,
folding, inclusions, crusting or obvious scratches. Steel sheets and strips shall
not have visible laminations. If the above surface defects are present, the
removal is allowed, and the removal depth shall not exceed half the thickness
tolerance of steel sheets and strips. Other defects are allowed, but the depth
and height shall not exceed half the thickness tolerance of steel sheets and
strips, and the minimum thickness of steel sheets and strips shall be
guaranteed.
6.8.2 During the continuous production of steel strips, local surface defects are
not easily found and removed, thus allowing delivery with defects, but the
defective portion shall not exceed 6 % of the total length of each coil of steel
strip.
6.8.3 Surface quality characteristics of steel sheets and strips shall comply with
the requirements of Table 4.
Table 4 -- Surface quality characteristics of each grade
Grade and code
Applicable
surface treatment
method
Characteristics
Normal grade
surface (FA)
Rolled surface
Pickled surface
The surface is allowed to have slight or local defects
such as pitting, concave, scratches with a depth (or
height) not exceeding half the thickness tolerance of the
steel strip, and the minimum allowable thickness of the
steel sheet and strip shall be ensured.
It is allowed to have local defects such as slight jagged
edges, partially uncut edges, under pickling, over
pickling and parking spots
Higher grade
surface (FB) Pickled surface
The surface is allowed to have local defects that do not
affect the formability, such as: slight scratches, slight
indentations, slight pitting, slight roll marks and
chromatic aberration. The surface is allowed to have
slight parking spot that is not obvious after oiling. It is not
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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