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S38815 Stainless Steel vs. S31100 Stainless Steel

Both S38815 stainless steel and S31100 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 83% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S38815 stainless steel and the bottom bar is S31100 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
270
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 34
4.5
Fatigue Strength, MPa 230
330
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 74
79
Shear Strength, MPa 410
580
Tensile Strength: Ultimate (UTS), MPa 610
1000
Tensile Strength: Yield (Proof), MPa 290
710

Thermal Properties

Latent Heat of Fusion, J/g 370
300
Maximum Temperature: Corrosion, °C 400
470
Maximum Temperature: Mechanical, °C 860
1100
Melting Completion (Liquidus), °C 1360
1420
Melting Onset (Solidus), °C 1310
1380
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 19
16
Density, g/cm3 7.5
7.7
Embodied Carbon, kg CO2/kg material 3.8
3.1
Embodied Energy, MJ/kg 54
44
Embodied Water, L/kg 140
170

Common Calculations

PREN (Pitting Resistance) 18
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
40
Resilience: Unit (Modulus of Resilience), kJ/m3 220
1240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
36
Strength to Weight: Bending, points 21
29
Thermal Shock Resistance, points 15
28

Alloy Composition

Aluminum (Al), % 0 to 0.3
0
Carbon (C), % 0 to 0.030
0 to 0.060
Chromium (Cr), % 13 to 15
25 to 27
Copper (Cu), % 0.75 to 1.5
0
Iron (Fe), % 56.1 to 67
63.6 to 69
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0.75 to 1.5
0
Nickel (Ni), % 13 to 17
6.0 to 7.0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 5.5 to 6.5
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0
0 to 0.25