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S31100 Stainless Steel vs. AISI 304 Stainless Steel

Both S31100 stainless steel and AISI 304 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S31100 stainless steel and the bottom bar is AISI 304 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
170 to 360
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 4.5
8.0 to 43
Fatigue Strength, MPa 330
210 to 440
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
77
Shear Strength, MPa 580
400 to 690
Tensile Strength: Ultimate (UTS), MPa 1000
580 to 1180
Tensile Strength: Yield (Proof), MPa 710
230 to 860

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 470
420
Maximum Temperature: Mechanical, °C 1100
710
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 16
15
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
3.0
Embodied Energy, MJ/kg 44
43
Embodied Water, L/kg 170
150

Common Calculations

PREN (Pitting Resistance) 26
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 40
86 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 1240
140 to 1870
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 36
21 to 42
Strength to Weight: Bending, points 29
20 to 32
Thermal Diffusivity, mm2/s 4.2
4.2
Thermal Shock Resistance, points 28
12 to 25

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.080
Chromium (Cr), % 25 to 27
18 to 20
Iron (Fe), % 63.6 to 69
66.5 to 74
Manganese (Mn), % 0 to 1.0
0 to 2.0
Nickel (Ni), % 6.0 to 7.0
8.0 to 10.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0 to 0.25
0