ASTM A217 Grade WC9 Cast Cr-Mo Steel
Alloy Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength570MPa
Yield Strength310MPa
Brinell Hardness170HB
Maximum Service Temperature460°C
Chemical Composition
C
0.050 to 0.18%
CR
2.0 to 2.8%
MO
0.9 to 1.2%
MN
0.4 to 0.7%
SI
0 to 0.6%
P
0 to 0.040%
S
0 to 0.045%
RES.
Residuals res. | | 0 to 1.0%
RESIDUALS RES.
0 to 1.0%
FE
93.5 to 96.7%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
23 %
Fatigue Strength
220 MPa
Poisson's Ratio
0.29
Reduction in Area
39 %
Shear Modulus
73 GPa
Tensile Strength: Ultimate (UTS)
570 MPa
Tensile Strength: Yield (Proof)
310 MPa
Hardness
Brinell Hardness
170
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
260 J/g
Maximum Temperature: Mechanical
460 °C
Melting Completion (Liquidus)
1460 °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
17 points
Electrical
Electrical Conductivity: Equal Volume
7.8 % IACS
Electrical Conductivity: Equal Weight (Specific)
9.0 % IACS
Calculated
PREN (Pitting Resistance)
5.9
Resilience: Ultimate (Unit Rupture Work)
110 MJ/m 3
Resilience: Unit (Modulus of Resilience)
250 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
20 points
Environmental
Base Metal Price
3.9 % relative
Embodied Carbon
1.8 kg CO 2 /kg material
Embodied Energy
23 MJ/kg
Embodied Energy
23 MJ/kg 9.9 x 10 3 BTU/lb
Embodied Water
59 L/kg
Embodied Water
59 L/kg 7.0 gal/lb
Registered Designations & Aliases
ASTM A217 Grade WC9 Cast Cr-Mo Steel
Standards
ASTM A217 ASTM A217: Standard Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for High-Temperature Service
ASTM A217 ASTM A217: Standard Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for High-Temperature Service Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011 Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993 Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005