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S64512 Stainless Steel vs. S82121 Stainless Steel

Both S64512 stainless steel and S82121 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S64512 stainless steel and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
28
Fatigue Strength, MPa 540
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
78
Shear Strength, MPa 700
470
Tensile Strength: Ultimate (UTS), MPa 1140
730
Tensile Strength: Yield (Proof), MPa 890
510

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
430
Maximum Temperature: Mechanical, °C 750
1020
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 28
15
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
14
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.3
2.8
Embodied Energy, MJ/kg 47
40
Embodied Water, L/kg 110
150

Common Calculations

PREN (Pitting Resistance) 18
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
180
Resilience: Unit (Modulus of Resilience), kJ/m3 2020
660
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 40
26
Strength to Weight: Bending, points 31
23
Thermal Diffusivity, mm2/s 7.5
4.0
Thermal Shock Resistance, points 42
20

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.035
Chromium (Cr), % 11 to 12.5
21 to 23
Copper (Cu), % 0
0.2 to 1.2
Iron (Fe), % 80.6 to 84.7
66.7 to 75.4
Manganese (Mn), % 0.5 to 0.9
1.0 to 2.5
Molybdenum (Mo), % 1.5 to 2.0
0.3 to 1.3
Nickel (Ni), % 2.0 to 3.0
2.0 to 4.0
Nitrogen (N), % 0.010 to 0.050
0.15 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.010
Vanadium (V), % 0.25 to 0.4
0