EN 1.7244 (18CrMoS4) Chromium-Molybdenum Steel
Other Steels
spheroidized and cold-drawn
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength580MPa
Yield Strength450MPa
Brinell Hardness180HB
Maximum Service Temperature420°C
Chemical Composition
C
0.15 to 0.21%
CR
0.9 to 1.2%
MO
0.15 to 0.25%
MN
0.6 to 0.9%
SI
0 to 0.3%
P
0 to 0.025%
S
0.020 to 0.040%
CU
0 to 0.25%
FE
96.8 to 98.2%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
11 %
Fatigue Strength
280 MPa
Poisson's Ratio
0.29
Reduction in Area
65 %
Shear Modulus
73 GPa
Shear Strength
350 MPa
Tensile Strength: Ultimate (UTS)
580 MPa
Tensile Strength: Yield (Proof)
450 MPa
Hardness
Brinell Hardness
180
Physical
Density
7.8 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
44 W/m-K
Thermal Diffusivity
12 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
17 points
Electrical
Electrical Conductivity: Equal Volume
7.3 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.3 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
61 MJ/m 3
Resilience: Unit (Modulus of Resilience)
530 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
21 points
Strength to Weight: Bending
20 points
Environmental
Base Metal Price
2.5 % relative
Embodied Carbon
1.5 kg CO 2 /kg material
Embodied Energy
20 MJ/kg
Embodied Energy
20 MJ/kg 8.5 x 10 3 BTU/lb
Embodied Water
51 L/kg
Embodied Water
51 L/kg 6.1 gal/lb
Registered Designations & Aliases
1.72441.724418CrMoS418CrMoS4EN 1.7244 (18CrMoS4) Chromium-Molybdenum Steel
Standards
EN 10084 EN 10084: 2008 Case hardening steels. Technical delivery conditions
EN 10263-3 EN 10263-3: 2001 Steel rod, bars and wire for cold heading and cold extrusion. Technical delivery conditions for case hardening steels
EN 10263-3 EN 10263-3: Steel rod, bars and wire for cold heading and cold extrusion - Part 3: Technical delivery conditions for case hardening steels