4130 is a low alloy steel that is commonly used in the oil patch, predominately in wellhead applications. It is a heat treatable alloy steel that contains nominally .30% Carbon, with Chromium and Molybdenum as the primary hardening elements.
The popularity of this grade stems from its ability to be easily welded while maintaining good strength and impact properties.
C | Mn | P | S | Si | Cr | Mo | |
Minimum | 0.280 | 0.400 | 0.150 | 0.800 | 0.150 | ||
Maximum | 0.320 | 0.600 | 0.025 | 0.025 | 0.350 | 1.100 | 0.250 |
Normalized, Annealed or As-rolled - no mechanical properties; suitable for further heat treatment