PACIFIC 4130 is a chromium-molybdenum low alloy steel with lower carbon than the more popular 4140. Because of lower carbon content, it has better weldability but lower hardenability (response to hardening). Maximum achievable hardness by furnace hardening is approximately 52 HRC. 4130 can be hardened by either water or oil quenching. PACIFIC 4130 is furnished in either the annealed or normalized condition depending upon mill availability.
CHEMICAL COMPOSITION: Heat Analysis - ranges and limits %
| C | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|
| .28/.33 | .40/.60 | .035 max | .040 max | .80/1.10 | .15/.25 |
TYPICAL PROPERTIES: Approximate - not for specification
| Tensile (psi) | Yield (psi) | Elongation | Hardness | Machinability |
|---|---|---|---|---|
95,000 |
80,000 |
18% |
179 HB |
70% |
PROCESSING TEMPERATURES: Typical
| Forge | Normalize | Anneal | Water Harden | Oil Harden | Temper |
|---|---|---|---|---|---|
2200°F max |
1600/1700°F |
1525/1575°F |
1550/1600°F |
1575/1625°F |
400/1300°F |
Shapes and Conditions Available:
 | Annealed Cold Drawn Rounds from 1/2" through 3/4" Diameter
| Normalized Cold Drawn Rounds from 7/8" through 1-1/2" Diameter
| |
