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AISI 420 Stainless Steel vs. ASTM Grade HC Steel

Both AISI 420 stainless steel and ASTM grade HC 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 AISI 420 stainless 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, % 8.0 to 15
6.0
Fatigue Strength, MPa 220 to 670
96
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
430
Tensile Strength: Yield (Proof), MPa 380 to 1310
200

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.5
Chromium (Cr), % 12 to 14
26 to 30
Iron (Fe), % 82.3 to 87.9
61.9 to 74
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 0 to 0.75
0 to 4.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040