MakeItFrom.com
Menu (ESC)

S31277 Stainless Steel vs. SAE-AISI 8640 Steel

Both S31277 stainless steel and SAE-AISI 8640 steel are iron alloys. Both are furnished in the annealed condition. They have 43% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S31277 stainless steel and the bottom bar is SAE-AISI 8640 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
23
Fatigue Strength, MPa 380
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
73
Shear Strength, MPa 600
360
Tensile Strength: Ultimate (UTS), MPa 860
570
Tensile Strength: Yield (Proof), MPa 410
380

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 36
2.6
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.7
1.5
Embodied Energy, MJ/kg 90
20
Embodied Water, L/kg 220
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
120
Resilience: Unit (Modulus of Resilience), kJ/m3 410
380
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
20
Strength to Weight: Bending, points 25
20
Thermal Shock Resistance, points 19
17

Alloy Composition

Carbon (C), % 0 to 0.020
0.38 to 0.43
Chromium (Cr), % 20.5 to 23
0.4 to 0.6
Copper (Cu), % 0.5 to 1.5
0
Iron (Fe), % 35.5 to 46.2
96.6 to 97.8
Manganese (Mn), % 0 to 3.0
0.75 to 1.0
Molybdenum (Mo), % 6.5 to 8.0
0.15 to 0.25
Nickel (Ni), % 26 to 28
0.4 to 0.7
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040