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S44627 Stainless Steel vs. SAE-AISI 8642 Steel

Both S44627 stainless steel and SAE-AISI 8642 steel are iron alloys. Both are furnished in the annealed condition. They have 73% 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 S44627 stainless steel and the bottom bar is SAE-AISI 8642 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 24
23
Fatigue Strength, MPa 200
270
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
73
Shear Strength, MPa 310
370
Tensile Strength: Ultimate (UTS), MPa 490
580
Tensile Strength: Yield (Proof), MPa 300
380

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
39
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.6
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.5
Embodied Energy, MJ/kg 41
20
Embodied Water, L/kg 160
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
120
Resilience: Unit (Modulus of Resilience), kJ/m3 220
390
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
20
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 4.6
10
Thermal Shock Resistance, points 16
17

Alloy Composition

Carbon (C), % 0 to 0.010
0.4 to 0.45
Chromium (Cr), % 25 to 27.5
0.4 to 0.6
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 69.2 to 74.2
96.6 to 97.8
Manganese (Mn), % 0 to 0.4
0.75 to 1.0
Molybdenum (Mo), % 0.75 to 1.5
0.15 to 0.25
Nickel (Ni), % 0 to 0.5
0.4 to 0.7
Niobium (Nb), % 0.050 to 0.2
0
Nitrogen (N), % 0 to 0.015
0
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.4
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.040