GEN 320LR Overview
GEN 320LR has a chemical composition similar to GEN 320 with lower level of carbon, silicon, phosphorus and sulfur. Additionally, niobium (columbium) and manganese content are controlled at narrower ranges. These modifications minimize the occurrence of hot cracking and micro‐fissuring (while maintaining the corrosion resistance) frequently encountered in fully austenitic stainless steel weld metals.
AWS 化学成分（典型）
| %C | %Cr | %Ni | %Mo | %Mn |
|---|---|---|---|---|
|
0.025 max 0.007 |
19.0 – 21.0 20.02 |
32.0 – 36.0 32.82 |
2.0 – 3.0 2.38 |
1.5 ‐ 2.0 1.84 |
| %Si | %P | %S | %Cu | %Nb (Cb) |
|---|---|---|---|---|
|
0.15 max 0.07 |
0.015 max 0.012 |
0.02 max 0.001 |
3.0 – 4.0 3.35 |
8x%C – 0.4 0.23 |
典型的焊接金属机械性能
| 抗拉强度 | 86,000 psi | 593 MPa |
| 屈服强度 | 57,000 psi | 393 MPa |
| 伸长 | 34% |
Typical Welding Parameters
| 过程 | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| 氩弧焊 (GTAW) | 1/16” (1.6 mm) | 14 – 17 | 90 – 130 | 100% Ar |
| 3/32” (2.4 mm) | 15 – 20 | 120 – 175 | 100% Ar | |
| 米格 (GMAW) | .035” (0.9 mm) | 29 – 33 | 160 – 190 | 98%Ar – 2%O2 |
| .045” (1.1 mm) | 29 – 33 | 180 – 220 | 98%Ar – 2%O2 | |
| Sub Arc (SAW) | .093” (2.4 mm) | 29 – 32 | 300 – 375 | |
| .125” (3.2 mm) | 29 – 32 | 400 – 550 |