Boiler and heat exchanger tube (Japan Standard-JIS G3461, JIS G3462)
Standard:
Japanese Industrial Standard JIS G3461 —- For Carbon Steel Materials
Japanese Industrial Standard JIS G3462 —- For Alloy Steel Materials
Purpose:
For the boiler pipes, tobacco pipes, superheater tubes, air preheater tubes.
The main production steel grades:
STB340, STB410, STBA22, STBA23 so on.
After consultation, can also supply other grades of steel.
Mechanical properties:
| Standard | Trademark | Tensile strength (MPa) | Yield strength (MPa) | Elongation(%) |
| JIS G3461 | STB340 | ≥340 | ≥175 | ≥35 |
| STB410 | ≥410 | ≥255 | ≥25 | |
| JIS G3462 | STBA22 | ≥415 | ≥210 | ≥30 |
| STBA23 | ≥415 | ≥210 | ≥30 |
Chemical Composition：
| Standard | Trademark | Chemical Composition | |||||||||
| C | Si | Mn | P | S | Cr | Mo | Cu | Ni | V | ||
| JIS G3461 | STB340 | ≤0.18 | ≤0.3 | 0.30～0.60 | ≤0.035 | ≤0.035 | / | / | / | / | / |
| STB410 | ≤0.32 | ≤0.35 | 0.30～0.80 | ≤0.035 | ≤0.035 | / | / | / | / | / | |
| JIS G3462 | STBA22 | ≤0.15 | ≤0.50 | 0.30～0.60 | ≤0.035 | ≤0.035 | 0.80～1.25 | 0.45～0.65 | / | / | / |
| STBA23 | ≤0.15 | 0.50～1.00 | 0.30～0.60 | ≤0.030 | ≤0.030 | 1.00～1.50 | 0.45～0.65 | / | / | / | |