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AISI 4130H
Category Steel
Class Alloy steel
Type H-steel
Common Names Chromium-molybdenum steel
Designations  France: AFNOR 25 CD 4 (S)
Germany: DIN 1.7218
Italy: UNI 25 CrMo 4 , UNI 25 CrMo 4 KB
Japan: JIS SCCrM 1 , JIS SCM 2
Sweden: SS 2225
United Kingdom: B.S. CDS 110
United States: ASTM A304 , SAE J1268 , UNS H41300

Composition

ElementWeight %
C  0.27-0.33 
Mn  0.30-0.70 
Cr  0.75-1.20 
Mo  0.15-0.25 
P  0.035 
S  0.040 
Si  0.15-0.30 

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  
Tensile Strength (Mpa) 560  25  annealed at 865°C  more
Yield Strength (Mpa) 360 
Elongation (%) 28.2 
Reduction in Area (%) 56 
Hardness (HB) 156  25  annealed at 865°C more

Thermal Properties

Properties Conditions 
T (°C)Treatment
Thermal Conductivity (W/m-K) 42.7  100 more  
Specific Heat (J/kg-K) 477  50-100 more  

Electric Properties

Properties Conditions 
T (°C)Treatment
Electric Resistivity (10-9W-m) 223  20 more  
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