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AISI 420F Stainless Steel vs. ASTM A372 Grade A Steel

Both AISI 420F stainless steel and ASTM A372 grade A steel are iron alloys. They have 86% of their average alloy composition in common. There are 31 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 AISI 420F stainless steel and the bottom bar is ASTM A372 grade A steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 18
22
Fatigue Strength, MPa 270
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 460
320
Tensile Strength: Ultimate (UTS), MPa 740
500
Tensile Strength: Yield (Proof), MPa 430
270

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 760
400
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
52
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.4
Embodied Energy, MJ/kg 28
18
Embodied Water, L/kg 100
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
95
Resilience: Unit (Modulus of Resilience), kJ/m3 480
200
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
18
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 6.8
14
Thermal Shock Resistance, points 27
16

Alloy Composition

Carbon (C), % 0.3 to 0.4
0 to 0.3
Chromium (Cr), % 12 to 14
0
Iron (Fe), % 82.4 to 87.6
98.3 to 99.85
Manganese (Mn), % 0 to 1.3
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.060
0 to 0.015
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0.15 to 0.35
0 to 0.010