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S21900 Stainless Steel vs. S30615 Stainless Steel

Both S21900 stainless steel and S30615 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 87% 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 S21900 stainless steel and the bottom bar is S30615 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 50
39
Fatigue Strength, MPa 380
270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
75
Shear Strength, MPa 510
470
Tensile Strength: Ultimate (UTS), MPa 710
690
Tensile Strength: Yield (Proof), MPa 390
310

Thermal Properties

Latent Heat of Fusion, J/g 290
340
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 980
960
Melting Completion (Liquidus), °C 1400
1370
Melting Onset (Solidus), °C 1350
1320
Specific Heat Capacity, J/kg-K 480
500
Thermal Conductivity, W/m-K 14
14
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 15
19
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 3.0
3.7
Embodied Energy, MJ/kg 43
53
Embodied Water, L/kg 160
170

Common Calculations

PREN (Pitting Resistance) 25
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 300
220
Resilience: Unit (Modulus of Resilience), kJ/m3 380
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26
25
Strength to Weight: Bending, points 23
23
Thermal Diffusivity, mm2/s 3.8
3.7
Thermal Shock Resistance, points 15
16

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.5
Carbon (C), % 0 to 0.080
0.16 to 0.24
Chromium (Cr), % 19 to 21.5
17 to 19.5
Iron (Fe), % 59.4 to 67.4
56.7 to 65.3
Manganese (Mn), % 8.0 to 10
0 to 2.0
Nickel (Ni), % 5.5 to 7.5
13.5 to 16
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
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