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EN 1.4646 Stainless Steel vs. EN 1.7779 Steel

Both EN 1.4646 stainless steel and EN 1.7779 steel are iron alloys. They have 68% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4646 stainless steel and the bottom bar is EN 1.7779 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
240
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
16
Fatigue Strength, MPa 340
430
Impact Strength: V-Notched Charpy, J 90
38
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 500
500
Tensile Strength: Ultimate (UTS), MPa 750
810
Tensile Strength: Yield (Proof), MPa 430
660

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 910
470
Melting Completion (Liquidus), °C 1390
1460
Melting Onset (Solidus), °C 1340
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
13

Otherwise Unclassified Properties

Base Metal Price, % relative 13
4.0
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.8
2.8
Embodied Energy, MJ/kg 41
41
Embodied Water, L/kg 160
64

Common Calculations

PREN (Pitting Resistance) 23
5.0
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
120
Resilience: Unit (Modulus of Resilience), kJ/m3 460
1150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
29
Strength to Weight: Bending, points 24
25
Thermal Shock Resistance, points 16
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0.020 to 0.1
0.17 to 0.23
Chromium (Cr), % 17 to 19
3.0 to 3.3
Copper (Cu), % 1.5 to 3.0
0 to 0.3
Iron (Fe), % 59 to 67.3
93.8 to 95.4
Manganese (Mn), % 10.5 to 12.5
0.3 to 0.5
Molybdenum (Mo), % 0 to 0.5
0.5 to 0.6
Nickel (Ni), % 3.5 to 4.5
0 to 0.3
Nitrogen (N), % 0.2 to 0.3
0
Phosphorus (P), % 0 to 0.050
0 to 0.025
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.010
Vanadium (V), % 0
0.45 to 0.55