ER 307 / ER 307LSi Welding Wire
OVERVIEW OF ER 307/ ER 307LSi
ER 307 and ER 307LSi are versatile austenitic stainless steel welding wires with balanced alloying elements that support:
- Exceptional weld quality and bead appearance
- Strong mechanical properties
- Suitable performance on ferrous, stainless, and alloy steels
- Low risk of cracking and distortion
ER 307LSi contains increased silicon for improved fluidity and arc stability, making it ideal for mechanized and manual welding.
CHEMICAL COMPOSITION
| Element | Typical Composition (%) |
| Carbon (C) | ≤ 0.15 |
| Manganese (Mn) | 2.0 – 3.0 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.03 |
| Silicon (Si) | ER 307: ≤ 1.0ER 307LSi: 1.5 – 3.0 |
| Chromium (Cr) | 19.0 – 21.0 |
| Nickel (Ni) | 9.0 – 11.0 |
| Iron (Fe) | Balance |
MECHANICAL PROPERTIES
| Property | Typical Value |
| Tensile Strength | ≥ 515 MPa (75 ksi) |
| Yield Strength | ≥ 290 MPa (42 ksi) |
| Elongation | ≥ 40% |
| Hardness | ≤ 200 HB |
PHYSICAL PROPERTIES
| Density: | ~7.9 g/cm³ |
| Melting Range: | 1450–1480°C |
| Thermal Conductivity: | Moderate |
| Coefficient of Thermal Expansion: | Higher than ferritic grades |
APPLICATIONS OF ER 307 / ER 307LSi WELDING WIRE
- Welding of dissimilar steels (stainless to carbon steel)
- Joining high-strength and alloy steels
- Welding of machine parts subjected to impact and stress
- Pressure vessels and boilers
- Automotive and railway components
- Crusher parts, shafts, gears, and structural fabrication
- Maintenance and repair in mining, construction, and steel plants
- Applications requiring high ductility and crack resistance
EQUIVALENT GRADES
| Standard System | Equivalent Grade |
| AWS A5.9 / ASME SFA A5.9 | ER307 / ER307LSi |
| UNS | S30700 / S30715 |
| EN ISO | Comparable to X10CrNi18-8 |
| JIS | SUS307 / SUS307S |
ER 307/ER 307LSi TIG Wire
ER 307/ER 307LSi MIG Wire
Your perfect stainless steel solution is here—choose how you want to continue.