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EN 1.4411 Stainless Steel vs. EN 1.7720 Steel

Both EN 1.4411 stainless steel and EN 1.7720 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 78% of their average alloy composition in common. There are 31 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 1.4411 stainless steel and the bottom bar is EN 1.7720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
19
Fatigue Strength, MPa 370
230
Impact Strength: V-Notched Charpy, J 68
30
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 870
590
Tensile Strength: Yield (Proof), MPa 600
340

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 880
410
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 17
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.0
2.2
Embodied Energy, MJ/kg 41
30
Embodied Water, L/kg 130
51

Common Calculations

PREN (Pitting Resistance) 22
2.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
97
Resilience: Unit (Modulus of Resilience), kJ/m3 920
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31
21
Strength to Weight: Bending, points 26
20
Thermal Diffusivity, mm2/s 4.6
11
Thermal Shock Resistance, points 28
17

Alloy Composition

Carbon (C), % 0 to 0.060
0.1 to 0.15
Chromium (Cr), % 15 to 17
0.3 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 73.1 to 79.5
96.6 to 98.6
Manganese (Mn), % 0 to 1.0
0.4 to 0.7
Molybdenum (Mo), % 1.5 to 2.0
0.4 to 0.6
Nickel (Ni), % 4.0 to 6.0
0 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 0.8
0 to 0.45
Sulfur (S), % 0 to 0.025
0 to 0.020
Vanadium (V), % 0
0.22 to 0.3