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S44725 Stainless Steel vs. S35115 Stainless Steel

Both S44725 stainless steel and S35115 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 78% of their average alloy composition in common.

For each property being compared, the top bar is S44725 stainless steel and the bottom bar is S35115 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 22
46
Fatigue Strength, MPa 210
280
Poisson's Ratio 0.27
0.28
Rockwell B Hardness 84
86
Shear Modulus, GPa 81
79
Shear Strength, MPa 320
470
Tensile Strength: Ultimate (UTS), MPa 500
670
Tensile Strength: Yield (Proof), MPa 310
310

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 500
440
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
26
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.1
4.8
Embodied Energy, MJ/kg 44
67
Embodied Water, L/kg 170
190

Common Calculations

PREN (Pitting Resistance) 33
35
Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
250
Resilience: Unit (Modulus of Resilience), kJ/m3 240
240
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
24
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 4.6
3.9
Thermal Shock Resistance, points 16
15

Alloy Composition

Carbon (C), % 0 to 0.015
0 to 0.030
Chromium (Cr), % 25 to 28.5
23 to 25
Iron (Fe), % 67.6 to 73.5
47.6 to 55.8
Manganese (Mn), % 0 to 0.4
0 to 1.0
Molybdenum (Mo), % 1.5 to 2.5
1.5 to 2.5
Nickel (Ni), % 0 to 0.3
19 to 22
Niobium (Nb), % 0 to 0.26
0
Nitrogen (N), % 0 to 0.018
0.2 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.040
0.5 to 1.5
Sulfur (S), % 0 to 0.020
0 to 0.015
Titanium (Ti), % 0 to 0.26
0