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S44700 Stainless Steel vs. SAE-AISI 8645 Steel

Both S44700 stainless steel and SAE-AISI 8645 steel are iron alloys. They have 68% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is S44700 stainless steel and the bottom bar is SAE-AISI 8645 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
12 to 23
Fatigue Strength, MPa 300
280 to 350
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 82
73
Shear Strength, MPa 380
380 to 400
Tensile Strength: Ultimate (UTS), MPa 600
600 to 670
Tensile Strength: Yield (Proof), MPa 450
390 to 560

Thermal Properties

Latent Heat of Fusion, J/g 300
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 480
470
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 18
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.5
Embodied Energy, MJ/kg 49
20
Embodied Water, L/kg 180
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
77 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 480
420 to 840
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
21 to 24
Strength to Weight: Bending, points 20
20 to 22
Thermal Shock Resistance, points 19
18 to 20

Alloy Composition

Carbon (C), % 0 to 0.010
0.43 to 0.48
Chromium (Cr), % 28 to 30
0.4 to 0.6
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 64.9 to 68.5
96.5 to 97.7
Manganese (Mn), % 0 to 0.3
0.75 to 1.0
Molybdenum (Mo), % 3.5 to 4.2
0.15 to 0.25
Nickel (Ni), % 0 to 0.15
0.4 to 0.7
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.2
0.15 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.040