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Ningbo New-era steel Tube Co.,Ltd.
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Product (231)
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- Precision Steel Tubes (72)
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- Structural Steel Tubes (16)
- Oil and Gas Pipes (5)
- Welded Steel Tube (1)
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Company Info
Ningbo New-era steel Tube Co.,Ltd. [China (Mainland)]
Business Type:Manufacturer, Trading Company, Agent, Distributor/Wholesaler
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)
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Standard Download
This standard is applied to seamless cold and warm deformed steel pipes of general purpose of carbon and alloy steel.
1.1. Pipes are to produce in accordance with requirements of present standard conforming with technological process in accordance with established procedure.
1.2. Depending on quality pipes are to be produced by the following groups:
(1)– with chemical composition regulation of finished steel conforming with GOST 1050, GOST 14959, GOST 4543, GOST 19281;
(2)– with mechanical properties regulation mentioned in table 1 and chemical composition regulation of steel grade conforming with GOST 1050, GOST 14959, GOST 4543, GOST 19281;
(3)– with mechanical properties regulation controlled on heat treatment examples and chemical composition regulation of steel grade conforming with GOST 1050, GOST 14959, GOST4543, GOST 19281. Mechanical properties are to conform with requirements of steel grades;
(4)– without mechanical properties and chemical composition regulation but with test hydraulic pressure;
(5)– after special heat treatment. Steel grade, heat treatment mode and mechanical properties are established by documents in accordance with established procedure.
(1)– with chemical composition regulation of finished steel conforming with GOST 1050, GOST 14959, GOST 4543, GOST 19281;
(2)– with mechanical properties regulation mentioned in table 1 and chemical composition regulation of steel grade conforming with GOST 1050, GOST 14959, GOST 4543, GOST 19281;
(3)– with mechanical properties regulation controlled on heat treatment examples and chemical composition regulation of steel grade conforming with GOST 1050, GOST 14959, GOST4543, GOST 19281. Mechanical properties are to conform with requirements of steel grades;
(4)– without mechanical properties and chemical composition regulation but with test hydraulic pressure;
(5)– after special heat treatment. Steel grade, heat treatment mode and mechanical properties are established by documents in accordance with established procedure.
Steel grade | Tensile strength, σB, MPa (kgs/mm) | Yield strength,σT, MPa, (kgs/mm) | Elongation, δs, % | Brinell hardness (provided wall thickness over 10 mm) | |
Min | Diameter impression, mm, min | Hardness number HB, max | |||
10 (St 37.00) | 343 (35) | 206 (21) | 24 | 5,1 | 137 |
20 (St 44.00) | 412 (42) | 245 (25) | 21 | 4,8 | 156 |
35 | 510 (52) | 294 (30) | 17 | 4,4 | 187 |
45 | 589 (60) | 323 (33) | 14 | 4,2 | 207 |
10G2 | 422 (43) | 245 (25) | 22 | 4,3 | 197 |
15X | 412 (42) | - | 19 | 4,5 | 179 |
20T | 431 (44) | - | 17 | 4,5 | 179 |
40X | 618 (63) | - | 14 | 4,1 | 217 |
30XGCA | 491 (50) | - | 18 | 4,0 | 229 |
15XM | 431 (44) | 226 (23) | 21 | - | - |
