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S81921 Stainless Steel vs. SAE-AISI 1095 Steel

Both S81921 stainless steel and SAE-AISI 1095 steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S81921 stainless steel and the bottom bar is SAE-AISI 1095 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
200 to 270
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
10 to 11
Fatigue Strength, MPa 370
310 to 370
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
72
Shear Strength, MPa 460
400 to 540
Tensile Strength: Ultimate (UTS), MPa 710
680 to 900
Tensile Strength: Yield (Proof), MPa 500
500 to 590

Thermal Properties

Latent Heat of Fusion, J/g 290
240
Maximum Temperature: Mechanical, °C 990
400
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
47
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
9.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
11

Otherwise Unclassified Properties

Base Metal Price, % relative 14
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.4
Embodied Energy, MJ/kg 41
19
Embodied Water, L/kg 150
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
63 to 84
Resilience: Unit (Modulus of Resilience), kJ/m3 630
660 to 930
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
24 to 32
Strength to Weight: Bending, points 23
22 to 26
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 20
22 to 29

Alloy Composition

Carbon (C), % 0 to 0.030
0.9 to 1.0
Chromium (Cr), % 19 to 22
0
Iron (Fe), % 66.7 to 75.9
98.4 to 98.8
Manganese (Mn), % 2.0 to 4.0
0.3 to 0.5
Molybdenum (Mo), % 1.0 to 2.0
0
Nickel (Ni), % 2.0 to 4.0
0
Nitrogen (N), % 0.14 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0 to 0.050