AISI 4130 Steel, normalized at 870C (1600F)


Subcategory: AISI 4000 Series Steel; Ferrous Metal; Low Alloy Steel; Medium Carbon Steel; Metal

Key Words: alloy steels, UNS G41300, AMS 6350, AMS 6356, AMS 6360, AMS 6361, AMS 6372, AMS 6370, AMS 6371, AMS 6373, ASTM A322, ASTM A331, ASTM A505, ASTM A513, ASTM A519, ASTM A646, JIS SCM 2, JIS SCCrM 1, SS14 2225 (Sweden), B.S. CDS 110 (UK), medium carbon steels, chromium-molybdenum, chrome-moly, MIL SPEC MIL-S-16974, SAE J404, SAE J412, SAE J770, DIN 1.7218, AFNOR 25 CD 4 (France), MIL-S-6758 (flat and round bar), MIS-S-18729 ANN and NORM (sheet and plate), QQS-624 (round bar)

Component   Wt. %
C0.28 - 0.33 
Cr0.8 - 1.1 
Fe97.3 - 98.22 
Mn0.4 - 0.6 
Mo0.15 - 0.25 
PMax 0.035 
SMax 0.04 
Si0.15 - 0.35 

Physical PropertiesMetricEnglishComments
Density7.85 g/cc0.284 lb/in 

Mechanical Properties
Hardness, Brinell197197 
Hardness, Knoop219219 Converted from Brinell hardness.
Hardness, Rockwell B9292 Converted from Brinell hardness.
Hardness, Rockwell C1313 Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers207207 Converted from Brinell hardness.
Tensile Strength, Ultimate670 MPa97200 psi 
Tensile Strength, Yield435 MPa63100 psi 
Elongation at Break25.5 %25.5 % in 50 mm
Reduction of Area60 %60 % 
Modulus of Elasticity205 GPa29700 ksi Typical for steel
Bulk Modulus140 GPa20300 ksi Typical for steel
Poisson's Ratio0.290.29 Calculated
Izod Impact87 J64.2 ft-lb 
Machinability70 %70 % annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.
Shear Modulus80 GPa11600 ksi Typical for steel

Electrical Properties
Electrical Resistivity2.23e-005 ohm-cm2.23e-005 ohm-cm specimen hardened and tempered; 20C (68F)
Electrical Resistivity at Elevated Temperature0.0001103 ohm-cm0.0001103 ohm-cm specimen hardened and tempered; 800C (1470F)
Electrical Resistivity at Elevated Temperature0.0001171 ohm-cm0.0001171 ohm-cm specimen hardened and tempered; 1000C (1830F)
Electrical Resistivity at Elevated Temperature0.0001222 ohm-cm0.0001222 ohm-cm specimen hardened and tempered; 1200C (2192F)
Electrical Resistivity at Elevated Temperature2.71e-005 ohm-cm2.71e-005 ohm-cm specimen hardened and tempered; 100C (212F)
Electrical Resistivity at Elevated Temperature3.42e-005 ohm-cm3.42e-005 ohm-cm specimen hardened and tempered; 200C (390F)
Electrical Resistivity at Elevated Temperature5.29e-005 ohm-cm5.29e-005 ohm-cm specimen hardened and tempered; 400C (750F)
Electrical Resistivity at Elevated Temperature7.86e-005 ohm-cm7.86e-005 ohm-cm specimen hardened and tempered; 600C (1110F)

Thermal Properties
Specific Heat Capacity0.477 J/g-C0.114 BTU/lb-F 50-100C
Specific Heat Capacity at Elevated Temperature0.523 J/g-C0.125 BTU/lb-F 150-200C
Specific Heat Capacity at Elevated Temperature0.837 J/g-C0.2 BTU/lb-F 750-800C
Thermal Conductivity42.7 W/m-K296 BTU-in/hr-ft-F 100C
Thermal Conductivity at Elevated Temperature30.1 W/m-K209 BTU-in/hr-ft-F 1200C
Thermal Conductivity at Elevated Temperature40.7 W/m-K282 BTU-in/hr-ft-F 300C

References for this datasheet.


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