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ASTM A209 Steel vs. ACI-ASTM CN7M Steel

Both ASTM A209 steel and ACI-ASTM CN7M steel are iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A209 steel and the bottom bar is ACI-ASTM CN7M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 150
140
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 34
44
Fatigue Strength, MPa 180 to 200
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 420 to 460
480
Tensile Strength: Yield (Proof), MPa 220 to 250
200

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 410
1100
Melting Completion (Liquidus), °C 1470
1410
Melting Onset (Solidus), °C 1420 to 1430
1450
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 50
21
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
1.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1 to 8.2
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
32
Density, g/cm3 7.9
8.1
Embodied Carbon, kg CO2/kg material 1.5
5.6
Embodied Energy, MJ/kg 20
78
Embodied Water, L/kg 47
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
170
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 170
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15 to 16
17
Strength to Weight: Bending, points 16 to 17
17
Thermal Diffusivity, mm2/s 13
5.6
Thermal Shock Resistance, points 12 to 14
12