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ASTM Grade HD Steel vs. ACI-ASTM CH20 Steel

Both ASTM grade HD steel and ACI-ASTM CH20 steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 9.1
38
Fatigue Strength, MPa 140
290
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 80
78
Tensile Strength: Ultimate (UTS), MPa 590
610
Tensile Strength: Yield (Proof), MPa 270
350

Thermal Properties

Latent Heat of Fusion, J/g 310
310
Maximum Temperature: Corrosion, °C 460
440
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1410
1410
Melting Onset (Solidus), °C 1370
1430
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 11
15

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 17
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
3.7
Embodied Energy, MJ/kg 45
53
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 29
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 44
200
Resilience: Unit (Modulus of Resilience), kJ/m3 180
300
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 21
22
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 4.3
3.7
Thermal Shock Resistance, points 19
15

Alloy Composition

Carbon (C), % 0 to 0.5
0 to 0.2
Chromium (Cr), % 26 to 30
22 to 26
Iron (Fe), % 58.4 to 70
54.7 to 66
Manganese (Mn), % 0 to 1.5
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 4.0 to 7.0
12 to 15
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 2.0
Sulfur (S), % 0 to 0.040
0 to 0.040