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EN 1.7779 Steel vs. EN 1.4449 Stainless Steel

Both EN 1.7779 steel and EN 1.4449 stainless steel are iron alloys. They have 71% 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 1.4449 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
48
Fatigue Strength, MPa 430
240
Impact Strength: V-Notched Charpy, J 38
91
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 500
440
Tensile Strength: Ultimate (UTS), MPa 810
620
Tensile Strength: Yield (Proof), MPa 660
250

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 470
960
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
19
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.8
3.9
Embodied Energy, MJ/kg 41
54
Embodied Water, L/kg 64
150

Common Calculations

PREN (Pitting Resistance) 5.0
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
240
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
22
Strength to Weight: Bending, points 25
20
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 23
14

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.17 to 0.23
0 to 0.035
Chromium (Cr), % 3.0 to 3.3
17 to 18.2
Copper (Cu), % 0 to 0.3
0 to 1.0
Iron (Fe), % 93.8 to 95.4
62.4 to 69.3
Manganese (Mn), % 0.3 to 0.5
0 to 2.0
Molybdenum (Mo), % 0.5 to 0.6
2.3 to 2.8
Nickel (Ni), % 0 to 0.3
11.5 to 12.5
Nitrogen (N), % 0
0 to 0.080
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015
Vanadium (V), % 0.45 to 0.55
0