GEN 630 Overview
GEN 630 is designed primarily for welding ASTM A564 Type 630 (17โ4PH) and other similar precipitationโhardening stainless steel. The chemical composition is modified to minimize the presence of ferrite networks in the martensitic microstructure which has a significant effect on mechanical properties. Mechanical properties of this alloy are greatly influenced by the heat treatment.
AWS Chemical Composition (Typical)
| %C | %Cr | %Ni | %Mo | %Mn |
|---|---|---|---|---|
|
0.05 max
0.02 |
16.0 โ 16.75
15.6 |
4.5 โ 5.0
4.6 |
0.75 max
0.13 |
0.25 โ 0.75
0.70 |
| %Si | %P | %S | %Cu | Nb+Ta |
|---|---|---|---|---|
0.75 max 0.42 |
0.03 max 0.02 |
0.03 max 0.02 |
3.25 โ 4.00 3.30 |
0.15 โ 0.30 0.25 |
Typical Weld Metal Mechanical Properties
| Tensile Strength | 150,000 psi | 1034 MPa |
| Yield Strength | 135,000 psi | 930 MPa |
| Elongation | 10 % |
Typical Welding Parameters
| Process | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| TIG (GTAW) | 1/16โ (1.6 mm) | 14 โ 16 | 90 โ 140 | 100% Ar |
| 3/32โ (2.4 mm) | 15 โ 20 | 120 โ 175 | 100% Ar | |
| 1/8โ (3.2 mm) | 16 โ 20 | 180 โ 300 | 100% Ar | |
| MIG (GMAW) | .035โ (0.9 mm) | 23 โ 29 | 170 โ 300 | 98%Ar โ 2%O2 |
| .045โ (1.1 mm) | 24 โ 30 | 190 โ 360 | 98%Ar โ 2%O2 | |
| Sub Arc (SAW) | .093โ (2.4 mm) | 28 โ 32 | 250 โ 450 | |
| .125โ (3.2 mm) | 29 โ 34 | 300 โ 500 |