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AISI 420 Stainless Steel vs. S30530 Stainless Steel

Both AISI 420 stainless steel and S30530 stainless steel are iron alloys. They have 80% of their average alloy composition in common.

For each property being compared, the top bar is AISI 420 stainless steel and the bottom bar is S30530 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0 to 15
46
Fatigue Strength, MPa 220 to 670
210
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 84
79
Shear Modulus, GPa 76
77
Shear Strength, MPa 420 to 1010
410
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
590
Tensile Strength: Yield (Proof), MPa 380 to 1310
230

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 620
970
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
3.4
Embodied Energy, MJ/kg 28
48
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 14
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
210
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 62
21
Strength to Weight: Bending, points 22 to 41
20
Thermal Diffusivity, mm2/s 7.3
4.1
Thermal Shock Resistance, points 25 to 62
13

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.080
Chromium (Cr), % 12 to 14
17 to 20.5
Copper (Cu), % 0
0.75 to 3.5
Iron (Fe), % 82.3 to 87.9
58.4 to 72.5
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0.75 to 1.5
Nickel (Ni), % 0 to 0.75
8.5 to 11.5
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0.5 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.030