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EN 1.6958 Steel vs. EN 1.4104 Stainless Steel

Both EN 1.6958 steel and EN 1.4104 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.6958 steel and the bottom bar is EN 1.4104 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
11 to 23
Fatigue Strength, MPa 700
230 to 310
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 700
400 to 450
Tensile Strength: Ultimate (UTS), MPa 1140
630 to 750
Tensile Strength: Yield (Proof), MPa 1070
350 to 560

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 450
860
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 47
25
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
8.5
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.2
Embodied Energy, MJ/kg 27
30
Embodied Water, L/kg 60
120

Common Calculations

PREN (Pitting Resistance) 2.9
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
77 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 3050
310 to 800
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 40
23 to 27
Strength to Weight: Bending, points 31
21 to 24
Thermal Diffusivity, mm2/s 13
6.7
Thermal Shock Resistance, points 39
22 to 27

Alloy Composition

Aluminum (Al), % 0.0050 to 0.050
0
Carbon (C), % 0.25 to 0.3
0.1 to 0.17
Chromium (Cr), % 1.2 to 1.7
15.5 to 17.5
Iron (Fe), % 92.6 to 94.5
78.8 to 84.1
Manganese (Mn), % 0.2 to 0.5
0 to 1.5
Molybdenum (Mo), % 0.35 to 0.55
0.2 to 0.6
Nickel (Ni), % 3.3 to 3.8
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0.15 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.015
0.15 to 0.35
Vanadium (V), % 0 to 0.12
0