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S38815 Stainless Steel vs. S21460 Stainless Steel

Both S38815 stainless steel and S21460 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 82% of their average alloy composition in common.

For each property being compared, the top bar is S38815 stainless steel and the bottom bar is S21460 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 34
46
Fatigue Strength, MPa 230
390
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 410
580
Tensile Strength: Ultimate (UTS), MPa 610
830
Tensile Strength: Yield (Proof), MPa 290
430

Thermal Properties

Latent Heat of Fusion, J/g 370
290
Maximum Temperature: Corrosion, °C 400
410
Maximum Temperature: Mechanical, °C 860
920
Melting Completion (Liquidus), °C 1360
1380
Melting Onset (Solidus), °C 1310
1330
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 15
18

Otherwise Unclassified Properties

Base Metal Price, % relative 19
14
Density, g/cm3 7.5
7.6
Embodied Carbon, kg CO2/kg material 3.8
3.0
Embodied Energy, MJ/kg 54
43
Embodied Water, L/kg 140
160

Common Calculations

PREN (Pitting Resistance) 18
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
320
Resilience: Unit (Modulus of Resilience), kJ/m3 220
460
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
30
Strength to Weight: Bending, points 21
26
Thermal Shock Resistance, points 15
17

Alloy Composition

Aluminum (Al), % 0 to 0.3
0
Carbon (C), % 0 to 0.030
0 to 0.12
Chromium (Cr), % 13 to 15
17 to 19
Copper (Cu), % 0.75 to 1.5
0
Iron (Fe), % 56.1 to 67
57.3 to 63.7
Manganese (Mn), % 0 to 2.0
14 to 16
Molybdenum (Mo), % 0.75 to 1.5
0
Nickel (Ni), % 13 to 17
5.0 to 6.0
Nitrogen (N), % 0
0.35 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 5.5 to 6.5
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030