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S81921 Stainless Steel vs. S30615 Stainless Steel

Both S81921 stainless steel and S30615 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 84% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S81921 stainless steel and the bottom bar is S30615 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
39
Fatigue Strength, MPa 370
270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
75
Shear Strength, MPa 460
470
Tensile Strength: Ultimate (UTS), MPa 710
690
Tensile Strength: Yield (Proof), MPa 500
310

Thermal Properties

Latent Heat of Fusion, J/g 290
340
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 990
960
Melting Completion (Liquidus), °C 1430
1370
Melting Onset (Solidus), °C 1390
1320
Specific Heat Capacity, J/kg-K 480
500
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 14
19
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 2.9
3.7
Embodied Energy, MJ/kg 41
53
Embodied Water, L/kg 150
170

Common Calculations

PREN (Pitting Resistance) 28
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
220
Resilience: Unit (Modulus of Resilience), kJ/m3 630
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
25
Strength to Weight: Bending, points 23
23
Thermal Diffusivity, mm2/s 4.0
3.7
Thermal Shock Resistance, points 20
16

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.5
Carbon (C), % 0 to 0.030
0.16 to 0.24
Chromium (Cr), % 19 to 22
17 to 19.5
Iron (Fe), % 66.7 to 75.9
56.7 to 65.3
Manganese (Mn), % 2.0 to 4.0
0 to 2.0
Molybdenum (Mo), % 1.0 to 2.0
0
Nickel (Ni), % 2.0 to 4.0
13.5 to 16
Nitrogen (N), % 0.14 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
3.2 to 4.0
Sulfur (S), % 0 to 0.030
0 to 0.030