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EN 1.6781 Steel vs. EN 1.4434 Stainless Steel

Both EN 1.6781 steel and EN 1.4434 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 1.6781 steel and the bottom bar is EN 1.4434 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
200
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17
41
Fatigue Strength, MPa 450
270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
79
Tensile Strength: Ultimate (UTS), MPa 830
660
Tensile Strength: Yield (Proof), MPa 680
310

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 450
980
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
21
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.9
4.2
Embodied Energy, MJ/kg 25
57
Embodied Water, L/kg 60
160

Common Calculations

PREN (Pitting Resistance) 3.3
32
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1220
240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
23
Strength to Weight: Bending, points 25
21
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 24
15

Alloy Composition

Carbon (C), % 0.15 to 0.19
0 to 0.030
Chromium (Cr), % 1.3 to 1.8
16.5 to 19.5
Iron (Fe), % 92.6 to 94.6
59.2 to 69.9
Manganese (Mn), % 0.55 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.45 to 0.6
3.0 to 4.0
Nickel (Ni), % 3.0 to 3.5
10.5 to 14
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015