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Stainless Steel - Grade 312
Description
Stainless Steel ER 312 is a nickel-chromium-iron alloy filler metal designed for welding cast alloys of similar composition. It is also valuable for welding dissimilar metals such as carbon steel to stainless steel, particularly those grades high in nickel. ER 312 produces a two-phase weld deposit with substantial percentages of ferrite in an austenite matrix, making it highly resistant to weld metal cracks and fissures.
Chemical Composition
The chemical composition of Grade 310 is as follows:
| Element | Weight % |
|---|---|
| Carbon (C) | 0.15 max |
| Manganese (Mn) | 1.0-2.5 |
| Silicon (Si) | 0.30-0.65 |
| Chromium (Cr) | 28-32 |
| Nickel (Ni) | 8-10.5 |
| Sulfur (S) | 0.03 max |
| Phosphorus (P) | 0.03 max |
| Molybdenum (Mo) | 0.75 max |
| Copper (Cu) | 0.75 max |
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Mechanical Properties
| Property | Value |
|---|---|
| Ultimate Tensile Strength | 102,950 psi (710 MPa) |
| Offset Yield Strength 0.2% | 85,550 psi (590 MPa) |
| Elongation | 40% |
Other Designations
- AWS: ER 312
- UNS: S31380
Fabrication and Heat Treatment
ER 312 is typically used for welding applications. No specific heat treatment information was provided.
Applications
- Welding cast alloys of similar composition
- Welding dissimilar metals such as carbon steel to stainless steel, particularly those grades high in nickel
Supplied Forms
ER 312 is available as a Stainless Steel TIG, MIG and SUB-ARC welding wire.
Features
- Produces a two-phase weld deposit with substantial percentages of ferrite in an austenite matrix
- Highly resistant to weld metal cracks and fissures
DIN Number
The given search results do not mention a DIN number for ER 312 stainless steel.