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ASTM Grade HN Steel vs. ACI-ASTM CA40 Steel

Both ASTM grade HN steel and ACI-ASTM CA40 steel are iron alloys. They have 66% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HN steel and the bottom bar is ACI-ASTM CA40 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
310
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 9.0
10
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 500
910

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 420
390
Maximum Temperature: Mechanical, °C 1080
750
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1350
1500
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 13
25
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 26
7.5
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 4.6
2.0
Embodied Energy, MJ/kg 66
28
Embodied Water, L/kg 180
100

Common Calculations

PREN (Pitting Resistance) 22
14
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
33
Strength to Weight: Bending, points 18
27
Thermal Diffusivity, mm2/s 3.5
6.7
Thermal Shock Resistance, points 11
33

Alloy Composition

Carbon (C), % 0.2 to 0.5
0.2 to 0.4
Chromium (Cr), % 19 to 23
11.5 to 14
Iron (Fe), % 44.9 to 57.8
81.5 to 88.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 23 to 27
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.5
Sulfur (S), % 0 to 0.040
0 to 0.040