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JIS G3472 Welded Carbon Steel Tubes For Automobile Structural Purposes
This japanese industrial standard specifies the electric resistance welded ewelded carbon steel tubes,hereinafter referred to as the tubes,used for automobiles.The applicable range of dimension of the tubes shall be as follows outside diameter:15.0mm and over,up to and including 127.0mm wall thickness:1.0mm and over,up to and including 7.0mm.
Description
Tianjin Wanlei Steel Pipe Co., Ltd. is one of the leading manufacturers and suppliers of jis g3472 welded carbon steel tubes for automobile structural purposes in China, featured by quality products and low price. If you're going to wholesale durable jis g3472 welded carbon steel tubes for automobile structural purposes made in China, welcome to get pricelist and free sample from our factory.
JIS G3472 Electric resistance welded carbon steel tubes
Chemical composition
| Designation | Chemical composition % | ||||
| C | Si | Mn | P | S | |
STAM 290GA STAM 290GB | 0.12 max | 0.35 max | 0.60 max | 0.035 max | 0.035 max |
| STAM 340G | 0.20 max | 0.35 max | 0.60 max | 0.035 max | 0.035 max |
| STAM 390G | 0.25 max | 0.35 max | 0.30-0.90 | 0.035 max | 0.035 max |
STAM 440G STAM 440H | 0.25 max | 0.35 max | 0.30-0.90 | 0.035 max | 0.035 max |
STAM 470G STAM 470H | 0.25 max | 0.35 max | 0.30-0.90 | 0.035 max | 0.035 max |
STAM 500G STAM 500H | 0.30 max | 0.35 max | 0.30-1.00 | 0.035 max | 0.035 max |
| STAM 540H | 0.30 max | 0.35 max | 0.30-1.00 | 0.035 max | 0.035 max |
Mechanical properties
| Grade | Designation | Flaring test | |||
| Tensile strength N/mm² min | Yield point or proof stress N/mm² min | Elongation % No.1 test piece No.2 test piece longitudinal direction min | Size of flared bell portion （D：outside diameter of tube） | ||
| Grade G | STAM 290GA | 294 | 177 | 40 | 1.25D |
| STAM 290GB | 294 | 177 | 35 | 1.20D | |
| STAM 340G | 343 | 196 | 35 | 1.20D | |
| STAM 390G | 392 | 235 | 30 | 1.20D | |
| STAM 440G | 441 | 304 | 25 | 1.15D | |
| STAM 470G | 471 | 324 | 22 | 1.15D | |
| STAM 500G | 500 | 353 | 18 | 1.15D | |
| STAM 440H | 441 | 353 | 20 | 1.15D | |
| STAM 470H | 471 | 412 | 18 | 1.10D | |
| STAM 500H | 500 | 431 | 16 | 1.10D | |
| STAM 540H | 539 | 481 | 13 | 1.05D |
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