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S82121 Stainless Steel vs. S30600 Stainless Steel

Both S82121 stainless steel and S30600 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 85% 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 S82121 stainless steel and the bottom bar is S30600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 28
45
Fatigue Strength, MPa 370
250
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
76
Shear Strength, MPa 470
430
Tensile Strength: Ultimate (UTS), MPa 730
610
Tensile Strength: Yield (Proof), MPa 510
270

Thermal Properties

Latent Heat of Fusion, J/g 290
350
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 1020
950
Melting Completion (Liquidus), °C 1430
1380
Melting Onset (Solidus), °C 1380
1330
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 14
19
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 2.8
3.6
Embodied Energy, MJ/kg 40
51
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 28
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
220
Resilience: Unit (Modulus of Resilience), kJ/m3 660
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26
22
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 4.0
3.7
Thermal Shock Resistance, points 20
14

Alloy Composition

Carbon (C), % 0 to 0.035
0 to 0.018
Chromium (Cr), % 21 to 23
17 to 18.5
Copper (Cu), % 0.2 to 1.2
0 to 0.5
Iron (Fe), % 66.7 to 75.4
58.9 to 65.3
Manganese (Mn), % 1.0 to 2.5
0 to 2.0
Molybdenum (Mo), % 0.3 to 1.3
0 to 0.2
Nickel (Ni), % 2.0 to 4.0
14 to 15.5
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
3.7 to 4.3
Sulfur (S), % 0 to 0.010
0 to 0.020