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EN 1.7779 Steel vs. EN 1.4859 Stainless Steel

Both EN 1.7779 steel and EN 1.4859 stainless steel are iron alloys. They have 49% 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 1.7779 steel and the bottom bar is EN 1.4859 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
140
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
23
Fatigue Strength, MPa 430
140
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 810
490
Tensile Strength: Yield (Proof), MPa 660
210

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Maximum Temperature: Mechanical, °C 470
1050
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1420
1360
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
13
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
36
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.8
6.2
Embodied Energy, MJ/kg 41
88
Embodied Water, L/kg 64
190

Common Calculations

PREN (Pitting Resistance) 5.0
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
91
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
17
Strength to Weight: Bending, points 25
17
Thermal Diffusivity, mm2/s 11
3.4
Thermal Shock Resistance, points 23
11

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.17 to 0.23
0.050 to 0.15
Chromium (Cr), % 3.0 to 3.3
19 to 21
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 93.8 to 95.4
40.3 to 49
Manganese (Mn), % 0.3 to 0.5
0 to 2.0
Molybdenum (Mo), % 0.5 to 0.6
0 to 0.5
Nickel (Ni), % 0 to 0.3
31 to 33
Niobium (Nb), % 0
0.5 to 1.5
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0.5 to 1.5
Sulfur (S), % 0 to 0.010
0 to 0.030
Vanadium (V), % 0.45 to 0.55
0