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EN 1.4125 Stainless Steel vs. EN 1.6956 Steel

Both EN 1.4125 stainless steel and EN 1.6956 steel are iron alloys. They have 83% of their average alloy composition in common. There are 32 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 EN 1.4125 stainless steel and the bottom bar is EN 1.6956 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
370
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 19
9.6
Fatigue Strength, MPa 300
680
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 500
730
Tensile Strength: Ultimate (UTS), MPa 800
1230
Tensile Strength: Yield (Proof), MPa 470
1120

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 870
440
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
46
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
5.0
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.3
2.2
Embodied Energy, MJ/kg 32
31
Embodied Water, L/kg 120
60

Common Calculations

PREN (Pitting Resistance) 19
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
110
Resilience: Unit (Modulus of Resilience), kJ/m3 570
3320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29
43
Strength to Weight: Bending, points 25
32
Thermal Diffusivity, mm2/s 4.1
12
Thermal Shock Resistance, points 29
36

Alloy Composition

Carbon (C), % 1.0 to 1.2
0.28 to 0.38
Chromium (Cr), % 16 to 18
1.0 to 1.7
Iron (Fe), % 78 to 82.7
92.4 to 95.3
Manganese (Mn), % 0 to 1.0
0.15 to 0.4
Molybdenum (Mo), % 0.4 to 0.8
0.3 to 0.6
Nickel (Ni), % 0
2.9 to 3.8
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035
Vanadium (V), % 0
0.080 to 0.25