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EN 1.4125 Stainless Steel vs. S15700 Stainless Steel

Both EN 1.4125 stainless steel and S15700 stainless steel are iron alloys. They have 90% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4125 stainless steel and the bottom bar is S15700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
200 to 460
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 19
1.1 to 29
Fatigue Strength, MPa 300
370 to 770
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 500
770 to 1070
Tensile Strength: Ultimate (UTS), MPa 800
1180 to 1890
Tensile Strength: Yield (Proof), MPa 470
500 to 1770

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
400
Maximum Temperature: Mechanical, °C 870
870
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
15
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
3.4
Embodied Energy, MJ/kg 32
47
Embodied Water, L/kg 120
140

Common Calculations

PREN (Pitting Resistance) 19
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
17 to 270
Resilience: Unit (Modulus of Resilience), kJ/m3 570
640 to 4660
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
42 to 67
Strength to Weight: Bending, points 25
32 to 43
Thermal Diffusivity, mm2/s 4.1
4.2
Thermal Shock Resistance, points 29
39 to 63

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.5
Carbon (C), % 1.0 to 1.2
0 to 0.090
Chromium (Cr), % 16 to 18
14 to 16
Iron (Fe), % 78 to 82.7
69.6 to 76.8
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 0.8
2.0 to 3.0
Nickel (Ni), % 0
6.5 to 7.7
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030