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AISI 420 Stainless Steel vs. AISI 430F Stainless Steel

Both AISI 420 stainless steel and AISI 430F stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 33 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 AISI 430F stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
230
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0 to 15
23
Fatigue Strength, MPa 220 to 670
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 420 to 1010
340
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
540
Tensile Strength: Yield (Proof), MPa 380 to 1310
310

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 620
870
Melting Completion (Liquidus), °C 1510
1430
Melting Onset (Solidus), °C 1450
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
25
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
8.5
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.1
Embodied Energy, MJ/kg 28
29
Embodied Water, L/kg 100
120

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
250
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
6.7
Thermal Shock Resistance, points 25 to 62
19

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.12
Chromium (Cr), % 12 to 14
16 to 18
Iron (Fe), % 82.3 to 87.9
79.2 to 83.9
Manganese (Mn), % 0 to 1.0
0 to 1.3
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.75
0
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0.15 to 0.35