EN 1.8503 (20CrMoV5-7) Nitriding Steel
Alloy Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength1000MPa
Yield Strength910MPa
Brinell Hardness300HB
Maximum Service Temperature440°C
Chemical Composition
C
0.16 to 0.24%
CR
1.2 to 1.5%
MO
0.65 to 0.8%
MN
0.4 to 0.8%
SI
0 to 0.4%
P
0 to 0.025%
S
0 to 0.035%
V
0.25 to 0.35%
AL
0 to 0.3%
FE
95.8 to 97.5%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
16 %
Fatigue Strength
600 MPa
Impact Strength: V-Notched Charpy
39 J
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Shear Strength
610 MPa
Tensile Strength: Ultimate (UTS)
1000 MPa
Tensile Strength: Yield (Proof)
910 MPa
Hardness
Brinell Hardness
300
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
440 °C
Melting Completion (Liquidus)
1470 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
41 W/m-K
Thermal Diffusivity
11 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
29 points
Electrical
Electrical Conductivity: Equal Volume
7.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.5 % IACS
Calculated
PREN (Pitting Resistance)
3.7
Resilience: Ultimate (Unit Rupture Work)
150 MJ/m 3
Resilience: Unit (Modulus of Resilience)
2200 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
35 points
Strength to Weight: Bending
28 points
Environmental
Base Metal Price
3.3 % relative
Embodied Carbon
2.3 kg CO 2 /kg material
Embodied Energy
33 MJ/kg
Embodied Energy
33 MJ/kg 14 x 10 3 BTU/lb
Embodied Water
57 L/kg
Embodied Water
57 L/kg 6.8 gal/lb
Registered Designations & Aliases
1.850320CrMoV5-7EN 1.8503 (20CrMoV5-7) Nitriding Steel
Standards
ISO 683-5 ISO 683-5: Heat treatable steels, alloy steels and free-cutting steels - Part 5: Nitriding steels
ISO 683-5 ISO 683-5: Heat treatable steels, alloy steels and free-cutting steels - Part 5: Nitriding steels Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005