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ACI-ASTM CH20 Steel vs. AWS E309H

Both ACI-ASTM CH20 steel and AWS E309H are iron alloys. They have a very high 98% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CH20 steel and the bottom bar is AWS E309H.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 38
34
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 78
78
Tensile Strength: Ultimate (UTS), MPa 610
620

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Melting Completion (Liquidus), °C 1410
1410
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 15
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 20
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.7
3.7
Embodied Energy, MJ/kg 53
52
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 25
25
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
22
Strength to Weight: Bending, points 21
21
Thermal Diffusivity, mm2/s 3.7
4.0
Thermal Shock Resistance, points 15
16

Alloy Composition

Carbon (C), % 0 to 0.2
0.040 to 0.15
Chromium (Cr), % 22 to 26
22 to 25
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 54.7 to 66
55.8 to 65.5
Manganese (Mn), % 0 to 1.5
0.5 to 2.5
Molybdenum (Mo), % 0 to 0.5
0 to 0.75
Nickel (Ni), % 12 to 15
12 to 14
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030