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ASTM A372 Grade G Steel vs. ASTM Grade HC Steel

Both ASTM A372 grade G steel and ASTM grade HC steel are iron alloys. They have 70% of their average alloy composition in common. There are 29 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 A372 grade G steel and the bottom bar is ASTM grade HC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 22
6.0
Fatigue Strength, MPa 310 to 380
96
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 650 to 910
430
Tensile Strength: Yield (Proof), MPa 430 to 550
200

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 410
1100
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 46
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
14
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 1.5
2.8
Embodied Energy, MJ/kg 20
40
Embodied Water, L/kg 49
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 160
21
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 810
95
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 23 to 32
16
Strength to Weight: Bending, points 21 to 27
16
Thermal Diffusivity, mm2/s 13
4.5
Thermal Shock Resistance, points 19 to 27
14

Alloy Composition

Carbon (C), % 0.25 to 0.35
0 to 0.5
Chromium (Cr), % 0.4 to 0.65
26 to 30
Iron (Fe), % 97.4 to 98.4
61.9 to 74
Manganese (Mn), % 0.7 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.25
0 to 0.5
Nickel (Ni), % 0
0 to 4.0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 2.0
Sulfur (S), % 0 to 0.010
0 to 0.040