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ASTM Grade HE Steel vs. AISI 420 Stainless Steel

Both ASTM grade HE steel and AISI 420 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 10
8.0 to 15
Fatigue Strength, MPa 160
220 to 670
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
76
Tensile Strength: Ultimate (UTS), MPa 670
690 to 1720
Tensile Strength: Yield (Proof), MPa 310
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 450
390
Maximum Temperature: Mechanical, °C 1100
620
Melting Completion (Liquidus), °C 1400
1510
Melting Onset (Solidus), °C 1360
1450
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 14
27
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 19
7.5
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.5
2.0
Embodied Energy, MJ/kg 50
28
Embodied Water, L/kg 190
100

Common Calculations

PREN (Pitting Resistance) 29
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 56
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 240
380 to 4410
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
25 to 62
Strength to Weight: Bending, points 22
22 to 41
Thermal Diffusivity, mm2/s 3.6
7.3
Thermal Shock Resistance, points 14
25 to 62

Alloy Composition

Carbon (C), % 0.2 to 0.5
0.15 to 0.4
Chromium (Cr), % 26 to 30
12 to 14
Iron (Fe), % 53.9 to 65.8
82.3 to 87.9
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 8.0 to 11
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