SAE-AISI 4320 (SNCM420, G43200) Ni-Cr-Mo Steel
Alloy Steels
annealed
Property Overview
Density7.9g/cm³
Elastic Modulus190GPa
Tensile Strength570MPa
Yield Strength430MPa
Brinell Hardness160HB
Maximum Service Temperature420°C
Chemical Composition
C
0.17 to 0.22%
CR
0.4 to 0.6%
NI
1.7 to 2.0%
MO
0.2 to 0.3%
MN
0.45 to 0.65%
SI
0.15 to 0.35%
P
0 to 0.035%
S
0 to 0.040%
FE
95.8 to 97%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
29 %
Fatigue Strength
320 MPa
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Shear Strength
370 MPa
Tensile Strength: Ultimate (UTS)
570 MPa
Tensile Strength: Yield (Proof)
430 MPa
Hardness
Brinell Hardness
160
Physical
Density
7.9 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
420 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
46 W/m-K
Thermal Diffusivity
13 mm 2 /s
Thermal Expansion
11 µm/m-K
Thermal Shock Resistance
19 points
Electrical
Electrical Conductivity: Equal Volume
7.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.5 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
150 MJ/m 3
Resilience: Unit (Modulus of Resilience)
480 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
19 points
Environmental
Base Metal Price
3.4 % relative
Embodied Carbon
1.7 kg CO 2 /kg material
Embodied Energy
22 MJ/kg
Embodied Energy
22 MJ/kg 9.4 x 10 3 BTU/lb
Embodied Water
52 L/kg
Embodied Water
52 L/kg 6.2 gal/lb
Registered Designations & Aliases
G43200SAE-AISI 4320 (SNCM420, G43200) Ni-Cr-Mo SteelSNCM420
Standards
ASTM A752 ASTM A752: Standard Specification for General Requirements for Wire Rods and Coarse Round Wire, Alloy Steel