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S35125 Stainless Steel vs. R30556 Alloy

Both S35125 stainless steel and R30556 alloy are iron alloys. Both are furnished in the annealed condition. They have 76% of their average alloy composition in common.

For each property being compared, the top bar is S35125 stainless steel and the bottom bar is R30556 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 39
45
Fatigue Strength, MPa 200
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
81
Shear Strength, MPa 370
550
Tensile Strength: Ultimate (UTS), MPa 540
780
Tensile Strength: Yield (Proof), MPa 230
350

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 490
450
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1380
1330
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 12
11
Thermal Expansion, µm/m-K 16
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 36
70
Density, g/cm3 8.1
8.4
Embodied Carbon, kg CO2/kg material 6.4
8.7
Embodied Energy, MJ/kg 89
130
Embodied Water, L/kg 210
300

Common Calculations

PREN (Pitting Resistance) 30
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
290
Resilience: Unit (Modulus of Resilience), kJ/m3 140
290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 19
26
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 3.1
2.9
Thermal Shock Resistance, points 12
18

Alloy Composition

Aluminum (Al), % 0
0.1 to 0.5
Boron (B), % 0
0 to 0.020
Carbon (C), % 0 to 0.1
0.050 to 0.15
Chromium (Cr), % 20 to 23
21 to 23
Cobalt (Co), % 0
16 to 21
Iron (Fe), % 36.2 to 45.8
20.4 to 38.2
Lanthanum (La), % 0
0.0050 to 0.1
Manganese (Mn), % 1.0 to 1.5
0.5 to 2.0
Molybdenum (Mo), % 2.0 to 3.0
2.5 to 4.0
Nickel (Ni), % 31 to 35
19 to 22.5
Niobium (Nb), % 0.25 to 0.6
0 to 0.3
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.5
0.2 to 0.8
Sulfur (S), % 0 to 0.015
0 to 0.015
Tantalum (Ta), % 0
0.3 to 1.3
Tungsten (W), % 0
2.0 to 3.5
Zinc (Zn), % 0
0.0010 to 0.1