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S32101 Stainless Steel vs. S31100 Stainless Steel

Both S32101 stainless steel and S31100 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 90% of their average alloy composition in common.

For each property being compared, the top bar is S32101 stainless steel and the bottom bar is S31100 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
270
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
4.5
Fatigue Strength, MPa 400
330
Poisson's Ratio 0.28
0.27
Rockwell C Hardness 27
28
Shear Modulus, GPa 78
79
Shear Strength, MPa 490
580
Tensile Strength: Ultimate (UTS), MPa 740
1000
Tensile Strength: Yield (Proof), MPa 500
710

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 430
470
Maximum Temperature: Mechanical, °C 1000
1100
Melting Completion (Liquidus), °C 1420
1420
Melting Onset (Solidus), °C 1370
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
16
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.6
3.1
Embodied Energy, MJ/kg 38
44
Embodied Water, L/kg 150
170

Common Calculations

PREN (Pitting Resistance) 27
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
40
Resilience: Unit (Modulus of Resilience), kJ/m3 640
1240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
36
Strength to Weight: Bending, points 24
29
Thermal Diffusivity, mm2/s 4.0
4.2
Thermal Shock Resistance, points 20
28

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.060
Chromium (Cr), % 21 to 22
25 to 27
Copper (Cu), % 0.1 to 0.8
0
Iron (Fe), % 67.3 to 73.3
63.6 to 69
Manganese (Mn), % 4.0 to 6.0
0 to 1.0
Molybdenum (Mo), % 0.1 to 0.8
0
Nickel (Ni), % 1.4 to 1.7
6.0 to 7.0
Nitrogen (N), % 0.2 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0 to 0.25