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EN 1.7720 Steel vs. EN 1.4563 Stainless Steel

Both EN 1.7720 steel and EN 1.4563 stainless steel are iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.7720 steel and the bottom bar is EN 1.4563 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
200
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 19
40
Fatigue Strength, MPa 230
210
Impact Strength: V-Notched Charpy, J 30
91
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 590
620
Tensile Strength: Yield (Proof), MPa 340
250

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 410
1100
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
12
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
36
Density, g/cm3 7.9
8.1
Embodied Carbon, kg CO2/kg material 2.2
6.3
Embodied Energy, MJ/kg 30
87
Embodied Water, L/kg 51
240

Common Calculations

PREN (Pitting Resistance) 2.1
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 97
200
Resilience: Unit (Modulus of Resilience), kJ/m3 300
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
21
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 11
3.2
Thermal Shock Resistance, points 17
13

Alloy Composition

Carbon (C), % 0.1 to 0.15
0 to 0.020
Chromium (Cr), % 0.3 to 0.5
26 to 28
Copper (Cu), % 0 to 0.3
0.7 to 1.5
Iron (Fe), % 96.6 to 98.6
31.6 to 40.3
Manganese (Mn), % 0.4 to 0.7
0 to 2.0
Molybdenum (Mo), % 0.4 to 0.6
3.0 to 4.0
Nickel (Ni), % 0 to 0.4
30 to 32
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.45
0 to 0.7
Sulfur (S), % 0 to 0.020
0 to 0.010
Vanadium (V), % 0.22 to 0.3
0