SAE5120 Steel — Specifications & Listings

SAE — American case hardening chrome steel per SAE standard. Close equivalent to 20MnCr5 but with lower Mn and Cr content. Good case hardening response.

Category: Alloy Steel

Grade Details

Grade	SAE5120
Standard	SAE
Description	American case hardening chrome steel per SAE standard. Close equivalent to 20MnCr5 but with lower Mn and Cr content. Good case hardening response.
Applications	Case hardened gears, pins, shafts, cams, automotive transmission parts

Chemical Composition (%)

C	Mn	Cr	Si	S	P
0.17–0.22	0.70–0.90	0.70–0.90	0.15–0.35	≤0.040	≤0.035

Mechanical Properties

Tensile Strength	750–950 MPa
Case Hardness HRC	58–62
Core Hardness HB	207–269
Elongation	≥10%

Typical Available Sizes

Round Bar	16mm–200mm dia
Flat Bar	20×8mm–150×40mm

Sizes are indicative. Contact seller for exact availability.

Active SAE5120 Listings on M-EX

No active SAE5120 listings at this time.