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AISI 5120 Steel: Specifications & Listings

AISI 5120: American case hardening chrome steel per AISI standard. Close equivalent to 20MnCr5/EN10084 but with lower Mn (0.70-0.90%) and Cr (0.70-0.90%). Good case hardening response.

Forms: Round Bar Category: Alloy Steel
Grade Details
GradeAISI 5120
Standard AISI
ApplicationsCase hardened gears, pins, shafts, cams
Most Active InNorth (Punjab)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
EN 10084 20MnCr5 EN 10084:2008 Europe 11 listings, 11 RFQs →
EN 10084 16MnCr5 EN 10084:2008 Europe 11 listings, 6 RFQs →
JIS G4104 SCr420 JIS G 4104:1979 Japan 2 listings, 0 RFQs →
SAE J404 5120 SAE J404:2009 USA 2 listings, 0 RFQs →
SAE J404 5115 SAE J404:2000 USA No activity yet
BS 970 (Part 1) 527A17 BS 970 (Part 1):1983 UK No activity yet
BS 970 EN207 BS 970:1955 UK No activity yet
Supply & Demand by FormSee Full Supply & Demand →
Round Bar →
Low Activity
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
SAE J404 5120 SAE J404:2009 Strong Match
SAE J404 5120 SAE J404:2000 Strong Match
SAE J404 5115 SAE J404:2009 Strong Match
SAE J404 5115 SAE J404:2000 Strong Match
BS 970 EN207 BS 970:1955 Strong Match
BS 970 (Part 1) 527A17 BS 970 (Part 1):1983 Strong Match
EN 10084 16MnCr5 EN 10084:2008 Close Alternative
BS 970 (Part 1) 527H17 BS 970 (Part 1):1991 Close Alternative
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Mn Cr Si
0.17–0.22 0.70–0.90 0.70–0.90 0.15–0.35
Mechanical Properties
Condition Carburized & Case Hardened
Tensile Strength 750–950 MPa
Case Hardness HRC 58–62
Core Hardness HB 207–269
Typical Available Sizes
Round Bar 16mm–200mm dia
Flat Bar 20×8mm–150×40mm
Sizes are indicative. Contact seller for exact availability.

Popular forms for this grade:

Round Bar (2)

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Buyer RFQs for AISI 5120

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AISI 5120 Round Bar
1.300 MT
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AISI 5120 Round Bar
3.500 MT
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