4130 Product Guide

Applications | Specifications | Mechanical and Chemical Data | Tolerances

Overview

Offers good strength, and weldability without compromising steel abrasion and impact resistance. Easy to machine and hot work as well as cold work in the annealed state, it becomes significantly more challenging once the steel is hardened. 4130 steel can also be easily welded. It is typically used in structural applications, including gears, fasteners, and some aircraft exterior.

Common Trade Names

UNS G41300, AISI 4130, C4130, Alloy Steel, Chrome-Moly, Chromoly

Other Resources

Weight Calculator | Mill Test Reports

Products

4130 Sheet/Plate | 4130 Hex Bar | 4130 Round Bar | 4130 Round Tube

Applications

Structural Frames
Gears
Fasteners

Specifications

AMS	MIL
S6758	T6736
6370
6350

	Annealed	Normalized
Physical Properties 4130
Density	0.283 lb/in3	0.283 lb/in3
Ultimate Tensile Strength	81.2 ksi	97.2 ksi
Yield Tensile Strength	66.7 ksi	63.1 ksi
Shear Strength	49 ksi	62 ksi
Hardness Rockwell \| Brinell	B82 \| 156	B92 \| 197
Elongation at Break Percentage	28.2%	25.5%
Modulus of Elasticity	29,700 ksi	29,700 ksi psi
Reduction of Area Percentage	56%	60%
Melting Point	2,590-2,660 °F	2,590-2,660 °F
Specific Heat	1.14 x 10^-1 BTU/lb-°F	1.14 x 10^-1 BTU/lb-°F
Thermal Conductivity	296 BTU-in/hr-ft^2-°F	296 BTU-in/hr-ft^2-°F

Chemistry Information
Element	Percentage
C	0.28 - 0.33
Cr	0.8 - 1.1
Fe	97.3 - 98.22
Mn	0.4 - 0.6
Mo	0.15 - 0.25
P	0.035 max
Si	0.15 - 0.35
S	0.04 max