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EN 1.4521 Stainless Steel vs. S35125 Stainless Steel

Both EN 1.4521 stainless steel and S35125 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 62% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4521 stainless steel and the bottom bar is S35125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
39
Fatigue Strength, MPa 230
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
78
Shear Strength, MPa 330
370
Tensile Strength: Ultimate (UTS), MPa 520
540
Tensile Strength: Yield (Proof), MPa 340
230

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 500
490
Maximum Temperature: Mechanical, °C 930
1100
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 23
12
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
36
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 2.8
6.4
Embodied Energy, MJ/kg 39
89
Embodied Water, L/kg 130
210

Common Calculations

PREN (Pitting Resistance) 26
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
170
Resilience: Unit (Modulus of Resilience), kJ/m3 280
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
19
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 6.2
3.1
Thermal Shock Resistance, points 18
12

Alloy Composition

Carbon (C), % 0 to 0.025
0 to 0.1
Chromium (Cr), % 17 to 20
20 to 23
Iron (Fe), % 74.6 to 81.1
36.2 to 45.8
Manganese (Mn), % 0 to 1.0
1.0 to 1.5
Molybdenum (Mo), % 1.8 to 2.5
2.0 to 3.0
Nickel (Ni), % 0
31 to 35
Niobium (Nb), % 0
0.25 to 0.6
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0.15 to 0.8
0