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S31100 Stainless Steel vs. S32003 Stainless Steel

Both S31100 stainless steel and S32003 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is S31100 stainless steel and the bottom bar is S32003 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 4.5
28
Fatigue Strength, MPa 330
370
Poisson's Ratio 0.27
0.27
Rockwell C Hardness 28
27
Shear Modulus, GPa 79
79
Shear Strength, MPa 580
480
Tensile Strength: Ultimate (UTS), MPa 1000
730
Tensile Strength: Yield (Proof), MPa 710
510

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 470
430
Maximum Temperature: Mechanical, °C 1100
1010
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 16
14
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
3.0
Embodied Energy, MJ/kg 44
42
Embodied Water, L/kg 170
150

Common Calculations

PREN (Pitting Resistance) 26
29
Resilience: Ultimate (Unit Rupture Work), MJ/m3 40
180
Resilience: Unit (Modulus of Resilience), kJ/m3 1240
660
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 36
26
Strength to Weight: Bending, points 29
23
Thermal Diffusivity, mm2/s 4.2
4.0
Thermal Shock Resistance, points 28
21

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 25 to 27
19.5 to 22.5
Iron (Fe), % 63.6 to 69
68.2 to 75.9
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
1.5 to 2.0
Nickel (Ni), % 6.0 to 7.0
3.0 to 4.0
Nitrogen (N), % 0
0.14 to 0.2
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0 to 0.25
0