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EN 1.7715 Steel vs. EN 1.3955 Stainless Steel

Both EN 1.7715 steel and EN 1.3955 stainless steel are iron alloys. They have 71% 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 1.7715 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, % 21
23
Fatigue Strength, MPa 240
150
Impact Strength: V-Notched Charpy, J 34
90
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 540
520
Tensile Strength: Yield (Proof), MPa 340
220

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 420
930
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
15
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.2
3.2
Embodied Energy, MJ/kg 30
45
Embodied Water, L/kg 52
140

Common Calculations

PREN (Pitting Resistance) 2.4
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
95
Resilience: Unit (Modulus of Resilience), kJ/m3 320
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 11
4.1
Thermal Shock Resistance, points 16
15

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.1 to 0.15
0 to 0.15
Chromium (Cr), % 0.3 to 0.6
16.5 to 18.5
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 96.5 to 98.3
65.5 to 73.5
Manganese (Mn), % 0.4 to 0.7
0 to 2.0
Molybdenum (Mo), % 0.5 to 0.7
0 to 0.75
Nickel (Ni), % 0 to 0.3
10 to 12
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Vanadium (V), % 0.22 to 0.28
0