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EN 1.6771 Steel vs. EN 1.3955 Stainless Steel

Both EN 1.6771 steel and EN 1.3955 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 31 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 1.6771 steel and the bottom bar is EN 1.3955 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0 to 8.7
23
Fatigue Strength, MPa 440 to 680
150
Impact Strength: V-Notched Charpy, J 20 to 32
90
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 930 to 1180
520
Tensile Strength: Yield (Proof), MPa 740 to 1140
220

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 440
930
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 46
15
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.9
3.2
Embodied Energy, MJ/kg 25
45
Embodied Water, L/kg 58
140

Common Calculations

PREN (Pitting Resistance) 2.5
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 75 to 93
95
Resilience: Unit (Modulus of Resilience), kJ/m3 1460 to 3450
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33 to 41
18
Strength to Weight: Bending, points 27 to 31
18
Thermal Diffusivity, mm2/s 13
4.1
Thermal Shock Resistance, points 27 to 35
15

Alloy Composition

Carbon (C), % 0.27 to 0.33
0 to 0.15
Chromium (Cr), % 0.8 to 1.2
16.5 to 18.5
Iron (Fe), % 92.2 to 95
65.5 to 73.5
Manganese (Mn), % 0.6 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.3 to 0.6
0 to 0.75
Nickel (Ni), % 3.0 to 4.0
10 to 12
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030