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S41425 Stainless Steel vs. S82121 Stainless Steel

Both S41425 stainless steel and S82121 stainless steel are iron alloys. They have 90% 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 S41425 stainless steel and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
28
Fatigue Strength, MPa 450
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
78
Shear Strength, MPa 570
470
Tensile Strength: Ultimate (UTS), MPa 920
730
Tensile Strength: Yield (Proof), MPa 750
510

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
430
Maximum Temperature: Mechanical, °C 810
1020
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 13
14
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 2.9
2.8
Embodied Energy, MJ/kg 40
40
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 21
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
180
Resilience: Unit (Modulus of Resilience), kJ/m3 1420
660
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 33
26
Strength to Weight: Bending, points 27
23
Thermal Diffusivity, mm2/s 4.4
4.0
Thermal Shock Resistance, points 33
20

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.035
Chromium (Cr), % 12 to 15
21 to 23
Copper (Cu), % 0 to 0.3
0.2 to 1.2
Iron (Fe), % 74 to 81.9
66.7 to 75.4
Manganese (Mn), % 0.5 to 1.0
1.0 to 2.5
Molybdenum (Mo), % 1.5 to 2.0
0.3 to 1.3
Nickel (Ni), % 4.0 to 7.0
2.0 to 4.0
Nitrogen (N), % 0.060 to 0.12
0.15 to 0.25
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.0050
0 to 0.010