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EN 1.6781 Steel vs. EN 1.4874 Stainless Steel

Both EN 1.6781 steel and EN 1.4874 stainless steel are iron alloys. They have a modest 37% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 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 1.4874 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
140
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 17
6.7
Fatigue Strength, MPa 450
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 830
480
Tensile Strength: Yield (Proof), MPa 680
360

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 450
1150
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 44
13
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
70
Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 1.9
7.6
Embodied Energy, MJ/kg 25
110
Embodied Water, L/kg 60
290

Common Calculations

PREN (Pitting Resistance) 3.3
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
29
Resilience: Unit (Modulus of Resilience), kJ/m3 1220
310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
16
Strength to Weight: Bending, points 25
16
Thermal Diffusivity, mm2/s 12
3.3
Thermal Shock Resistance, points 24
11

Alloy Composition

Carbon (C), % 0.15 to 0.19
0.35 to 0.65
Chromium (Cr), % 1.3 to 1.8
19 to 22
Cobalt (Co), % 0
18.5 to 22
Iron (Fe), % 92.6 to 94.6
23 to 38.9
Manganese (Mn), % 0.55 to 0.8
0 to 2.0
Molybdenum (Mo), % 0.45 to 0.6
2.5 to 3.0
Nickel (Ni), % 3.0 to 3.5
18 to 22
Niobium (Nb), % 0
0.75 to 1.3
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 0
2.0 to 3.0