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EN 1.3940 Stainless Steel vs. EN 1.7767 Steel

Both EN 1.3940 stainless steel and EN 1.7767 steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.3940 stainless steel and the bottom bar is EN 1.7767 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
20
Fatigue Strength, MPa 190
320 to 340
Impact Strength: V-Notched Charpy, J 130
46
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Tensile Strength: Ultimate (UTS), MPa 540
670 to 690
Tensile Strength: Yield (Proof), MPa 240
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 930
480
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
40
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 17
4.5
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.3
2.4
Embodied Energy, MJ/kg 47
33
Embodied Water, L/kg 150
64

Common Calculations

PREN (Pitting Resistance) 20
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 150
570 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
24
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 4.1
11
Thermal Shock Resistance, points 16
19 to 20

Alloy Composition

Carbon (C), % 0 to 0.030
0.1 to 0.15
Chromium (Cr), % 16.5 to 18.5
2.8 to 3.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 64.2 to 71.4
93.8 to 95.8
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 12 to 14
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0.1 to 0.2
0 to 0.012
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.15
Sulfur (S), % 0 to 0.020
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0.2 to 0.3