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EN 1.7779 Steel vs. EN 1.4477 Stainless Steel

Both EN 1.7779 steel and EN 1.4477 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, 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 1.4477 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 16
22 to 23
Fatigue Strength, MPa 430
420 to 490
Impact Strength: V-Notched Charpy, J 38
110
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Shear Strength, MPa 500
550 to 580
Tensile Strength: Ultimate (UTS), MPa 810
880 to 930
Tensile Strength: Yield (Proof), MPa 660
620 to 730

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 470
1100
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
13
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
20
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.8
3.7
Embodied Energy, MJ/kg 41
52
Embodied Water, L/kg 64
190

Common Calculations

PREN (Pitting Resistance) 5.0
41
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
940 to 1290
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
31 to 33
Strength to Weight: Bending, points 25
26 to 27
Thermal Diffusivity, mm2/s 11
3.5
Thermal Shock Resistance, points 23
23 to 25

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.17 to 0.23
0 to 0.030
Chromium (Cr), % 3.0 to 3.3
28 to 30
Copper (Cu), % 0 to 0.3
0 to 0.8
Iron (Fe), % 93.8 to 95.4
56.6 to 63.6
Manganese (Mn), % 0.3 to 0.5
0.8 to 1.5
Molybdenum (Mo), % 0.5 to 0.6
1.5 to 2.6
Nickel (Ni), % 0 to 0.3
5.8 to 7.5
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.015
Vanadium (V), % 0.45 to 0.55
0