TIANJIN GOLDEN BRIDGE WELDING MATERIALS GROUP CO.,LTD.
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R317
天津市金桥焊材集团股份有限公司
R317 is a pearlite heat-resistant steel welding electrode with low-hydrogen sodium coating containing Cr1%-Mo0.5%-V. It adopts DCEP connection method and is permitted for all positions welding. The work piece should be properly preheated and heat-treated after welding according to its structural characteristics.
The product is applicable for welding pearlite heat-resistant steel structures with working temperature below 540℃, such as high-temperature and high-pressure boiler pipes, petroleum cracking equipment, high-temperature synthetic chemical equipment, etc.
Chemical components of deposited metal (%)
Test item | C | Mn | Si | S | P | Cr | Mo | V |
| Example value | 0.062 | 0.63 | 0.42 | 0.007 | 0.018 | 1.20 | 0.50 | 0.18 |
Mechanical properties of deposited metal (preheated at 715-745℃×2h)_
Test item | Rm (MPa) | ReL/Rp0.2 (MPa) | A (%) |
| Example value | 630 | 540 | 24 |
X-ray flaw detection requirements: Level I
Reference current (DC+)
Welding electrode diameter (mm) | Φ2.5 | Φ3.2 | Φ4.0 | Φ5.0 |
| Welding current (A) | 60-90 | 90-120 | 140-180 | 170-210 |
1. The welding electrode shall be baked at about 350℃ for 1h before welding, and it shall be baked only upon use.
2. Impurities such as rust, oil stain and moisture must be removed from the work piece before welding.
2. Impurities such as rust, oil stain and moisture must be removed from the work piece before welding.
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