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S40945 Stainless Steel vs. S44635 Stainless Steel

Both S40945 stainless steel and S44635 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 78% 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 S40945 stainless steel and the bottom bar is S44635 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
240
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 25
23
Fatigue Strength, MPa 160
390
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 75
81
Shear Strength, MPa 270
450
Tensile Strength: Ultimate (UTS), MPa 430
710
Tensile Strength: Yield (Proof), MPa 230
580

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 450
610
Maximum Temperature: Mechanical, °C 710
1100
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
16
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
22
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.2
4.4
Embodied Energy, MJ/kg 31
62
Embodied Water, L/kg 94
170

Common Calculations

PREN (Pitting Resistance) 11
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
150
Resilience: Unit (Modulus of Resilience), kJ/m3 140
810
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 15
25
Strength to Weight: Bending, points 16
23
Thermal Diffusivity, mm2/s 6.9
4.4
Thermal Shock Resistance, points 15
23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.025
Chromium (Cr), % 10.5 to 11.7
24.5 to 26
Iron (Fe), % 85.1 to 89.3
61.5 to 68.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0 to 0.5
3.5 to 4.5
Niobium (Nb), % 0.18 to 0.4
0.2 to 0.8
Nitrogen (N), % 0 to 0.030
0 to 0.035
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0.050 to 0.2
0.2 to 0.8