Hebei Huayang Steel Pipe Co., Ltd is one of the leading manufacturers and suppliers of jis g3444 stk400 lsaw steel pipe for building structures in China. Please feel free to buy cheap jis g3444 stk400 lsaw steel pipe for building structures from our factory. All customized products are with high quality and low price.
Huayang JIS G3444 STK400 LSAW steel pipe is manufactured for building structures requiring reliable strength, dimensional consistency and stable longitudinal weld performance.
| STK400 | |
| JIS G3444 | |
JIS G3444 specifies carbon steel pipe for general structural purposes, including architecture, civil engineering, steel towers and other structural applications.
STK400 Material Performance
STK400 is a general structural carbon steel grade with a minimum tensile strength of 400 MPa and minimum yield strength of 235 MPa. Its chemical requirements include a maximum carbon content of 0.25%, while phosphorus and sulfur are each limited to 0.040%. The grade provides a practical balance of strength and weldability for structural fabrication. For automatic arc-welded pipe, JIS G3444 also specifies a weld tensile-strength requirement of at least 400 MPa. Huayang can provide dimensional inspection, weld nondestructive testing and other quality controls according to project requirements.
| 48.3 | 3.68 | 91 | 6,7,8,9,10,11,10,9,8,7,6 | 1.69 |
| 5.08 | 61 | 5,6,7,8,9,8,7,6,5 | 1.13 | |
| 60.3 | 3.91 | 61 | 5,6,7,8,9,8,7,6,5 | 1.77 |
| 5.54 | 37 | 4,5,6,7,6,5,4 | 1.07 | |
| 73 | 5.16 | 37 | 4,5,6,7,6,5,4 | 1.57 |
| 7.01 | 24 | 4,5,6,5,4 | 0.96 | |
| 88.9 | 5.49 | 24 | 4,5,6,5,4 | 1.42 |
| 7.62 | 19 | 3,4,5,4,3 | 1.19 | |
| 114.3 | 6.02 | 19 | 3,4,5,4,3 | 1.96 |
| 8.56 | 10 | 3,4,3 | 0.94 | |
| 141.3 | 6.55 | 10 | 3,4,3 | 1.44 |
| 9.53 | 7 | 2,3,2 | 1.08 | |
| 168.3 | 7.11 | 10 | 3,4,3 | 2.04 |
| 10.97 | 7 | 2,3,2 | 1.53 | |
| 219.1 | 8.18 | 7 | 2,3,2 | 2.59 |
| 12.7 | 5 | 2,3 | 1.73 | |
| 273 | 9.27 | 5 | 2,3 | 2.68 |
| 15.09 | 3 | 1,2 | 1.79 | |
| 323.8 | 10.31 | 3 | 1,2 | 2.52 |
| 17.48 | 2 | 1,1 | 1.26 | |
Pipe-end protection is advisable in case the pipe-ends are bevelled at the pipe manufacturer. In the case of overseas transport, there is an especially increased risk of damaged pipe-ends. This is caused by extra handling procedures in ports and shifting of the pipes onboard vessels.
can be applied along the pipe body. This wrapping helps to safeguard the coating surface from scratches, moisture, and contamination during long-distance transportation or prolonged outdoor storage. Especially for coated or painted pipes, the additional protective cloth layer significantly reduces the risk of mechanical damage, UV exposure, and corrosion initiation, ensuring the pipes arrive at the destination in optimal condition.
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