Material Properties & Chemical Composition Of SAE4130 Chrome Steel

 

Material Properties & Chemical Composition Of SAE4130 Chrome Steel

AISI 4130 steel (UNS G41300), also known as 4130 Chromoly steel, is a chrome-molybdenum series low alloy steel with high strength, toughness and hardenability, usually used in quenched and tempered condition.

Datasheet & Specification

Below is material AISI 4130 Chromoly steel datasheet including chemical composition, density, thermal expansion coefficient, thermal conductivity, yield strength, hardness, etc.

AISI SAE 4130 Chemical Composition

The table below lists AISI 4130 chemical composition.

	AISI 4130 Chemical Composition (%)
Steel Grade (UNS)	C	Si	Mn	P (≤)	S (≤)	Cr	Mo
4130 (G41300)	0.28-0.33	0.15-0.35	0.40-0.60	0.035	0.040	0.80-1.10	0.15-0.25

AISI 4130 Material Properties

Material AISI 4130 steel mechanical properties are given in the table below.

Steel (UNS)	Tensile strength (Mpa)	Yield strength (Mpa)	Elongation in 50 mm, %	Reduction in area, %	Hardness (HB)	Sample diameter	Conditions
AISI 4130 (G41300)	670	435	25.5	59.5	197	25mm (1 inch)	Normalized at 870 °C (1600 °F)
	560	460	21.5	59.5	217		Annealed at 865 °C (1585 °F)
	1040	979	18.1	63.9	302		Water quenched from 855 °C (1575 °F) & tempered at 540 °C (1000 °F)

SAE 4130 Steel Heat Treatment

The following table shows alloy 4130 chromoly steel heat treatment and rockwell hardness.

Chromoly 4130 Steel Heat Treatment
4130 Heat Treat	Temperature (℃)	Hardness	Cooling/Agent
Normalizing	885	197 HB	Air
Annealing	865	156 HB	Furnace cooling
Quenching	800-855		Water
Tempering (2 hour)	204	47 HRC	Water hardening
	260	45 HRC
	315	43 HRC
	370	42 HRC
	425	38 HRC
	480	34 HRC
	540	32 HRC
	595	26 HRC
	649	22 HRC