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AISI 420 Stainless Steel vs. ACI-ASTM CG12 Steel

Both AISI 420 stainless steel and ACI-ASTM CG12 steel are iron alloys. They have 80% 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 AISI 420 stainless steel and the bottom bar is ACI-ASTM CG12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0 to 15
40
Fatigue Strength, MPa 220 to 670
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
550
Tensile Strength: Yield (Proof), MPa 380 to 1310
220

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
430
Maximum Temperature: Mechanical, °C 620
1040
Melting Completion (Liquidus), °C 1510
1410
Melting Onset (Solidus), °C 1450
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
15
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
18
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
3.3
Embodied Energy, MJ/kg 28
48
Embodied Water, L/kg 100
160

Common Calculations

PREN (Pitting Resistance) 14
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
180
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 62
20
Strength to Weight: Bending, points 22 to 41
19
Thermal Diffusivity, mm2/s 7.3
4.0
Thermal Shock Resistance, points 25 to 62
12

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.12
Chromium (Cr), % 12 to 14
20 to 23
Iron (Fe), % 82.3 to 87.9
60.3 to 70
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.75
10 to 13
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