GB/T 24511-2017 English PDF (GBT24511-2017)

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GB/T 24511-2017: Stainless steel and heat resisting steel plate, sheet and strip for pressure equipment
GB/T 24511-2017
Stainless steel and heat resisting steel plate, sheet and strip for pressure equipments
ICS 77.140.50
H46
National Standards of People's Republic of China
Replace GB/T 24511-2009
Stainless steel and heat-resistant steel plates and strips for pressure equipment
Released on.2017-12-29
2018-09-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Content
Foreword III
1 range 1
2 Normative references 1
3 Classification and code 2
4 Ordering content 2
5 size, shape, weight 2
6 Technical requirements 7
7 Test method 14
8 Inspection rules 16
9 Packaging, Marking and Quality Certificate 16
Appendix A (Normative) Stainless steel density value 17
Appendix B (informative) Stainless steel grade comparison table 18
Appendix C (informative) Heat treatment system for stainless steel 20
Appendix D (informative) High temperature mechanical properties 22
Appendix E (informative) High-temperature strength of some austenitic heat-resistant stainless steels 23
Reference 25
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 24511-2009 "stainless steel plate and steel strip for pressure equipment", and GB/T 24511-2009 standard
The main technical changes are as follows.
--- Adjusted to supplement the normative reference documents;
--- Added 16 grades and related technical requirements. Among them, 11 grades of austenitic stainless steel, austenitic-ferritic duplex stainless steel
5 grades, and higher requirements in terms of composition and performance compared to GB /4237, GB /3280, GB /4238;
---Strengthen the thickness tolerance range of hot-rolled steel sheets and strips, and supplement the individual thickness tolerance requirements;
--- Increase the lower limit of the yield strength of the commonly used six austenitic stainless steels;
--- In the manufacturing method, the hot-rolled stainless steel and heat-resistant steel coil-cut steel sheets with a thickness of 14.0mm~25.0mm are clarified according to the leaflet.
Rolled steel sheet delivery requirements;
--- It is clear that steel plates can be produced by die-cast steel ingots, and the compression ratio is defined;
--- Increased the calculation method of Pitting Equivalent Index (PREN);
--- Compare the comparison test of duplex stainless steel in "special requirements";
--- Supplemented the reference standard for grain boundary corrosion test;
--- In the form of "informative appendix", the high temperature performance of some stainless steels has been added.
This standard was proposed by the China Iron and Steel Association.
This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183).
This standard was drafted. Shanxi Taigang Stainless Steel Co., Ltd., Metallurgical Industry Information Standards Institute, Baosteel Stainless Steel Co., Ltd.
Shandong Taishan Iron and Steel Group Co., Ltd., Hefei General Machinery Research Institute, China Special Equipment Inspection and Research Institute.
The main drafters of this standard. Li Guoping, Zhang Jiansheng, Zhang Weixu, Xu Zhongjie, Qi Haiyan, Huang Jiahu, Yin Lijun, Ren Yongxiu, Dong Li,
Zhu Fangyi, Wu Yuhong, Yan Mingde, Li Xiongfei.
The previous versions of the standards replaced by this standard are.
---GB/T 24511-2009.
Stainless steel and heat-resistant steel plates and strips for pressure equipment
1 Scope
This standard specifies the classification and code, order content, size, shape and weight of stainless steel and heat-resistant steel plates and steel strips for pressure equipment.
Technical requirements, test methods, inspection rules, packaging, marking and quality certificates.
This standard is applicable to hot-rolled stainless steel and heat-resistant steel plates and strips (including rolled steel sheets) for pressure-bearing equipment with a width of not less than 600 mm.
Cold-rolled stainless steel and heat-resistant steel sheets and strips (including rolled steel sheets).
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
Permissible deviation of chemical composition of finished products of GB/T 222 steel
GB/T 223.5 Determination of acid-dissolved silicon and total silicon content - Reducing silyl molybdate spectrophotometric method
GB/T 223.9 Determination of aluminium content of steels and alloys - chrome azure S spectrophotometric method
GB/T 223.11 Determination of chromium content in steels and alloys - either titration or potentiometric titration
GB/T 223.16 Methods for chemical analysis of steels and alloys - Determination of titanium content by chromotropic acid photometric method
GB/T 223.18 Methods for chemical analysis of steels and alloys - Separation of sodium thiosulfate - Iodometric method
GB/T 223.19 Methods for chemical analysis of steels and alloys - s.
GB/T 223.23 Determination of nickel content in steels and alloys - succinimide spectrophotometric method
GB/T 223.25 Methods for chemical analysis of steels and alloys - s
GB/T 223.26 Determination of molybdenum content of steels and alloys - thiocyanate spectrophotometric method
GB/T 223.28 Determination of molybdenum content by the method of α-benzoin method
GB/T 223.36 Methods for chemical analysis of steels and alloys - Distillation separation - Neutralometric titration
GB/T 223.40 Determination of bismuth content of steels and alloys
GB/T 223.58 Determination of manganese content - Sodium arsenite - Sodium nitrite titration method
GB/T 223.59 Determination of phosphorus content in steels and alloys - phosphine molybdenum blue spectrophotometric method and bismuth phosphomolybdate blue spectrophotometric method
GB/T 223.60 Steel and alloys - Determination of silicon content by perchloric acid dehydration gravimetric method
GB/T 223.68 Steel and alloy chemical analysis method - Determination of sulfur content by potassium iodate titration after combustion in tubular furnace
GB/T 223.69 Determination of carbon content of steels and alloys
GB/T 228.1 tensile testing of metallic materials - Part 1
GB/T 230.1 Rockwell hardness test for metallic materials - Part 1. Test methods (A, B, C, D, E, F, G, H, K, N,
T ruler)
GB/T 231.1 Brinell hardness test for metallic materials - Part 1. Test methods
GB/T 232 metal material bending test method
General provisions of GB/T 247 steel and steel strip packaging, marking and quality certificates
GB/T 708 cold rolled steel and steel strip size, shape, weight and tolerance
GB/T 709 hot rolled steel sheet and strip size, shape, weight and tolerance
GB/T 2975 steel and steel products mechanical properties sample sampling position and sample preparation
GB/T 4334 Corrosion test method for corrosion of stainless steels of metals and alloys
GB/T 4340.1 Vickers hardness test for metallic materials - Part 1. Test methods
GB/T 6394 method for determination of average grain size of metals
GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values
GB/T 11170 Determination of multi-element content of stainless steels
Metallographic method for determination of α-phase area content in GB/T 13305 stainless steel
General technical requirements for the delivery of GB/T 17505 steel and steel products
GB/T 20066 Sampling and sample preparation method for samples for determination of chemical composition of steel and iron
GB/T 20123 Determination of total carbon and sulfur content of steels - Infrared absorption method after high-frequency induction furnace combustion (conventional method)
GB/T 20124 Determination of nitrogen content of steels - Insulating gas fusion heat conduction method (conventional method)
GB/T 21433 stainless steel pressure vessel intergranular corrosion sensitivity test
3 classification and code
3.1 By edge status can be divided into.
a) trimming EC;
b) Uncut EM.
3.2 According to the dimensional accuracy can be divided into.
a) thickness ordinary precision PT.A;
b) Higher precision PT.B.
4 Ordering content
Contracts or orders ordered in accordance with this standard shall include the following.
a) product name (or product name);
b) brand or code;
c) standard number;
d) size and accuracy;
e) weight or quantity;
f) type of surface processing;
g) delivery status;
h) Other special requirements.
5 size, shape, weight
5.1 Dimensions and tolerances
5.1.1 Size
The nominal size range of steel plates and steel strips is shown in Table 1. The recommended nominal sizes are to comply with the requirements of GB/T 708 and GB/T 709.
Table 1 nominal size range is in millimeters
Product category nominal thickness nominal width
Hot rolled thick steel plate 6.00~100 600~4800
Hot rolled steel plate and steel strip 2.00~14.0 600~2100
Cold rolled steel plate and steel strip 1.50~8.00 600~2100
5.1.2 Thickness tolerance
5.1.2.1 The allowable deviation of the thickness of hot-rolled thick steel plates shall comply with the requirements of Table 2. Thickness of steel plate with thickness greater than 80.0mm to 100mm is allowed to be biased
The difference is determined by the supply and demand sides.
Table 2 Allowable deviation of thickness of hot-rolled thick steel plate a in millimeters
Nominal thickness
Nominal width
≤1000 >1000~1500 >1500~2500
PT.A PT.B PT.A PT.B PT.A PT.B
>2500
6.00~8.00 0.38 0.35 0.40 0.36 0.50 0.45
>8.00~15.0 0.45 0.42 0.48 0.44 0.60 0.55
0.80
>15.0~25.0 0.50 0.45 0.53 0.48 0.65 0.60
>25.0~40.0 0.62 0.58 0.67 0.63 0.83 0.78
0.98
>40.0~60.0 0.87 0.83 0.92 0.88 1.08 1.03
>60.0~80.0 0.87 0.83 0.92 0.88 1.38 1.33
1.48
a Negative thickness deviation is -0.30 mm.
5.1.2.2 The allowable deviation of the thickness of hot-rolled steel sheets and strips shall comply with the requirements of Table 3.
Table 3 The allowable deviation of the thickness of hot-rolled steel sheets and strips is in millimeters
Nominal thickness
Nominal width
≤1200 >1200~1500 >1500~1800 >1800~2100
PT.A PT.B PT.A PT.B PT.A PT.B PT.A PT.B
2.00~2.50
0.22
-0.22
0.20
-0.20
0.25
-0.25
0.23
-0.23
0.29
-0.29
0.27
-0.27
- -
>2.50~3.00
0.25
-0.25
0.23
-0.23
0.28
-0.28
0.26
-0.26
0.31
-0.30
0.28
-0.28
0.33
-0.30
0.31
-0.30
>3.00~4.00
0.28
-0.28
0.26
-0.26
0.31
-0.30
0.28
-0.28
0.33
-0.30
0.31
-0.30
0.35
-0.30
0.32
-0.30
>4.00~5.00
0.31
-0.30
0.28
-0.28
0.33
-0.30
0.30
-0.30
0.36
-0.30
0.33
-0.30
0.38
-0.30
0.35
-0.30
Table 3 (continued) Unit is mm
Nominal thickness
Nominal width
≤1200 >1200~1500 >1500~1800 >1800~2100
PT.A PT.B PT.A PT.B PT.A PT.B PT.A PT.B
>5.00~6.00
0.33
-0.30
0.31
-0.30
0.36
-0.30
0.33
-0.30
0.38
-0.30
0.35
-0.30
0.40
-0.30
0.37
-0.30
>6.00~8.00a 0.38 0.35 0.39 0.36 0.40 0.37 0.46 0.43
>8.00~10.0a 0.42 0.39 0.43 0.40 0.45 0.41 0.53 0.49
>10.0~14.0a 0.45 0.42 0.47 0.44 0.49 0.45 0.57 0.53
For hot-rolled steel strips with head-to-tail delivery, the thickness deviation does not apply to the abnormal part of the head and tail. The length is calculated according to the following formula. length (m) =
90/nominal thickness (mm), but the total length of each roll must not exceed 20m.
a Negative thickness deviation is -0.30 mm.
5.1.2.3 According to the requirements of the purchaser and stated in the contract, for the hot-rolled steel sheets and strips with a thickness of 6.0 mm or more, the thickness deviation may be
0, but the tolerance range is unchanged.
5.1.2.4 The allowable deviation of the thickness of cold-rolled steel sheets and strips shall comply with the requirements of Table 4.
Table 4 The allowable deviation of the thickness of cold-rolled steel sheets and strips is mm
Nominal thickness
Nominal width
≤1000 >1000~1300 >1300~2100
1.50~2.00 ±0.08 ±0.09 ±0.10
>2.00~2.50 ±0.09 ±0.10 ±0.11
>2.50~3.00 ±0.11 ±0.12 ±0.12
>3.00~4.00 ±0.13 ±0.14 ±0.14
>4.00~5.00 ±0.14 ±0.15 ±0.15
>5.00~6.50 ±0.15 ±0.16 ±0.16
>6.50~8.00 ±0.16 ±0.17 ±0.17
5.1.3 Width tolerance
5.1.3.1 Hot-rolled thick steel plates shall be delivered trimmed, and the allowable deviation of the width shall comply with the requirements of Table 5.
Table 5 Width tolerance of hot-rolled thick steel plate is in millimeters
Nominal thickness nominal width width tolerance
6.00~16.0
≤1500 10.0 0
>1500 15.0 0
Table 5 (continued) Unit is mm
Nominal thickness nominal width width tolerance
>16.0
≤2000 20.0 0
>2000~3000 25.0 0
>3000 30.0 0
5.1.3.2 Hot rolled coil cutting steel sheet shall be delivered by trimming. The allowable deviation of the width of the hot-rolled steel sheet and the steel strip and the coil-cut steel sheet trimmed shall comply with Table 6
The allowable deviation of the width of the hot-rolled steel strip without cutting is determined by both the supplier and the buyer.
Table 6 The allowable deviation of the width of the hot-rolled steel sheet and strip for trimming is mm
Nominal width width tolerance
600~2100 6.0 0
5.1.3.3 Cold-rolled steel sheets and strips shall be delivered trimmed, and the allowable deviation of the width shall comply with the requirements of Table 7.
Table 7 The allowable deviation of the width of cold-rolled steel sheets and strips is mm
Nominal thickness width tolerance
1.50~2.50 2.0 0
>2.50~3.50 3.0 0
>3.50~8.00 4.0 0
5.1.4 Length tolerance
The allowable deviation of the length of hot-rolled thick steel plate, hot-rolled steel-cut steel plate and cold-rolled steel-cut steel plate shall comply with the requirements of Table 8.
Table 8 The allowable deviation of t...