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ASTM Grade HC Steel vs. AISI 420 Stainless Steel

Both ASTM grade HC steel and AISI 420 stainless steel are iron alloys. They have 83% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HC steel and the bottom bar is AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 6.0
8.0 to 15
Fatigue Strength, MPa 96
220 to 670
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
76
Tensile Strength: Ultimate (UTS), MPa 430
690 to 1720
Tensile Strength: Yield (Proof), MPa 200
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 460
390
Maximum Temperature: Mechanical, °C 1100
620
Melting Completion (Liquidus), °C 1410
1510
Melting Onset (Solidus), °C 1370
1450
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
27
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 14
7.5
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.0
Embodied Energy, MJ/kg 40
28
Embodied Water, L/kg 170
100

Common Calculations

PREN (Pitting Resistance) 29
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 95
380 to 4410
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 16
25 to 62
Strength to Weight: Bending, points 16
22 to 41
Thermal Diffusivity, mm2/s 4.5
7.3
Thermal Shock Resistance, points 14
25 to 62

Alloy Composition

Carbon (C), % 0 to 0.5
0.15 to 0.4
Chromium (Cr), % 26 to 30
12 to 14
Iron (Fe), % 61.9 to 74
82.3 to 87.9
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 0 to 4.0
0 to 0.75
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