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AISI 420 Stainless Steel vs. ACI-ASTM CA28MWV Steel

Both AISI 420 stainless steel and ACI-ASTM CA28MWV steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 32 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 ACI-ASTM CA28MWV steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0 to 15
11
Fatigue Strength, MPa 220 to 670
470
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
1080
Tensile Strength: Yield (Proof), MPa 380 to 1310
870

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 390
380
Maximum Temperature: Mechanical, °C 620
740
Melting Completion (Liquidus), °C 1510
1470
Melting Onset (Solidus), °C 1450
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
25
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
4.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
11
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.0
3.1
Embodied Energy, MJ/kg 28
44
Embodied Water, L/kg 100
100

Common Calculations

PREN (Pitting Resistance) 14
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
110
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
1920
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 62
38
Strength to Weight: Bending, points 22 to 41
30
Thermal Diffusivity, mm2/s 7.3
6.6
Thermal Shock Resistance, points 25 to 62
40

Alloy Composition

Carbon (C), % 0.15 to 0.4
0.2 to 0.28
Chromium (Cr), % 12 to 14
11 to 12.5
Iron (Fe), % 82.3 to 87.9
81.4 to 85.8
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 0 to 0.5
0.9 to 1.3
Nickel (Ni), % 0 to 0.75
0.5 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3