ASTM A209 Grade T1a C-Mo Steel
Alloy Steels
Property Overview
Density7.9g/cm³
Elastic Modulus190GPa
Tensile Strength460MPa
Yield Strength250MPa
Brinell Hardness150HB
Maximum Service Temperature410°C
Chemical Composition
C
0.15 to 0.25%
MO
0.44 to 0.65%
MN
0.3 to 0.8%
SI
0.1 to 0.5%
P
0 to 0.025%
S
0 to 0.025%
FE
97.8 to 99.01%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
34 %
Fatigue Strength
200 MPa
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Shear Strength
310 MPa
Tensile Strength: Ultimate (UTS)
460 MPa
Tensile Strength: Yield (Proof)
250 MPa
Hardness
Brinell Hardness
150
Rockwell B Hardness
81
Physical
Density
7.9 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
410 °C
Melting Completion (Liquidus)
1470 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
50 W/m-K
Thermal Diffusivity
13 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
14 points
Electrical
Electrical Conductivity: Equal Volume
7.1 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.2 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
130 MJ/m 3
Resilience: Unit (Modulus of Resilience)
170 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
16 points
Strength to Weight: Bending
17 points
Environmental
Base Metal Price
2.4 % relative
Embodied Carbon
1.5 kg CO 2 /kg material
Embodied Energy
20 MJ/kg
Embodied Energy
20 MJ/kg 8.6 x 10 3 BTU/lb
Embodied Water
47 L/kg
Embodied Water
47 L/kg 5.6 gal/lb
Registered Designations & Aliases
ASTM A209 Grade T1a C-Mo Steel
Standards
ASTM A209 ASTM A209: Standard Specification for Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes
ASTM A209 ASTM A209: Standard Specification for Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes 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