eFunda: Properties of Alloy Steel AISI 5120
engineering fundamentals Alloy Steel AISI 5120
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AISI 5120
Category Steel
Class Alloy steel
Type Standard
Common Names Chromium steel
Designations  France: AFNOR 20 MC 5
Germany: DIN 1.7147
United States: ASTM A322 , ASTM A331 , ASTM A519 , SAE J404 , SAE J770 , UNS G51200

Composition

ElementWeight %
C  0.17-0.22 
Mn  0.70-0.90 
P  0.035 (max) 
S  0.04 (max) 
Si  0.15-0.30 
Cr  0.70-0.90 

Mechanical Properties

Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.7-8.03 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  
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