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EN 1.4434 Stainless Steel vs. EN 1.7779 Steel

Both EN 1.4434 stainless steel and EN 1.7779 steel are iron alloys. They have 69% 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 1.4434 stainless steel and the bottom bar is EN 1.7779 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
240
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 41
16
Fatigue Strength, MPa 270
430
Impact Strength: V-Notched Charpy, J 90
38
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
73
Shear Strength, MPa 450
500
Tensile Strength: Ultimate (UTS), MPa 660
810
Tensile Strength: Yield (Proof), MPa 310
660

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 980
470
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 16
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 21
4.0
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.2
2.8
Embodied Energy, MJ/kg 57
41
Embodied Water, L/kg 160
64

Common Calculations

PREN (Pitting Resistance) 32
5.0
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
120
Resilience: Unit (Modulus of Resilience), kJ/m3 240
1150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23
29
Strength to Weight: Bending, points 21
25
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 15
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0 to 0.030
0.17 to 0.23
Chromium (Cr), % 16.5 to 19.5
3.0 to 3.3
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 59.2 to 69.9
93.8 to 95.4
Manganese (Mn), % 0 to 2.0
0.3 to 0.5
Molybdenum (Mo), % 3.0 to 4.0
0.5 to 0.6
Nickel (Ni), % 10.5 to 14
0 to 0.3
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.045
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