ISI4130 is a widely used structural steel in oil field production, which has high hardenability. The welding quality of this steel is related to latitude, especially in the field. Latitude can affect the welding method, process and electrode control.

AISI4130 chemical composition

Carbon C: 0.26 to 0.34, samarium Si: 0.2 to 0.4, samarium manganese Mn: 0.40 to 0.70, AISI 4130 mold steel sulfur S: allowable residual content ≤ 0.035, samarium phosphorus P: allowable residual content ≤ 0.035, hafnium Cr: 0.80 to 1.10, hafnium Ni: Allowable residual content ≤ 0.030, Cu: Allowable residual content ≤ 0.030, Mo: 0.15 ～ 0.25

AISI4130 mechanical properties

Tensile strength σb (MPa): ≥930 (95), Yield strength σs (MPa): ≥785 (80), elongation δ5 (%): ≥12, section shrinkage ψ (%): ≥50, impact Work Akv (J): ≥63, impact toughness value αkv (J / cm2): ≥78 (8), hardness: ≤229HB.