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AISI 420 Stainless Steel vs. ASTM A209 Steel

Both AISI 420 stainless steel and ASTM A209 steel are iron alloys. 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 AISI 420 stainless steel and the bottom bar is ASTM A209 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
140 to 150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 8.0 to 15
34
Fatigue Strength, MPa 220 to 670
180 to 200
Poisson's Ratio 0.28
0.29
Rockwell B Hardness 84
77 to 81
Shear Modulus, GPa 76
73
Shear Strength, MPa 420 to 1010
280 to 310
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
420 to 460
Tensile Strength: Yield (Proof), MPa 380 to 1310
220 to 250

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 620
410
Melting Completion (Liquidus), °C 1510
1470
Melting Onset (Solidus), °C 1450
1420 to 1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
50
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
8.1 to 8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
2.4
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.0
1.5
Embodied Energy, MJ/kg 28
20
Embodied Water, L/kg 100
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
130 to 170
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 62
15 to 16
Strength to Weight: Bending, points 22 to 41
16 to 17
Thermal Diffusivity, mm2/s 7.3
13
Thermal Shock Resistance, points 25 to 62
12 to 14