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EN 1.4474 Stainless Steel vs. EN 1.7720 Steel

Both EN 1.4474 stainless steel and EN 1.7720 steel are iron alloys. They have 67% 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 1.4474 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, % 23
19
Fatigue Strength, MPa 320
230
Impact Strength: V-Notched Charpy, J 34
30
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
73
Tensile Strength: Ultimate (UTS), MPa 670
590
Tensile Strength: Yield (Proof), MPa 480
340

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 17
2.8
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.4
2.2
Embodied Energy, MJ/kg 48
30
Embodied Water, L/kg 170
51

Common Calculations

PREN (Pitting Resistance) 34
2.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
97
Resilience: Unit (Modulus of Resilience), kJ/m3 560
300
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
21
Strength to Weight: Bending, points 22
20
Thermal Diffusivity, mm2/s 4.6
11
Thermal Shock Resistance, points 18
17

Alloy Composition

Carbon (C), % 0 to 0.050
0.1 to 0.15
Chromium (Cr), % 25 to 27
0.3 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 61.2 to 69.1
96.6 to 98.6
Manganese (Mn), % 0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 1.3 to 2.0
0.4 to 0.6
Nickel (Ni), % 4.5 to 6.5
0 to 0.4
Nitrogen (N), % 0.12 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.45
Sulfur (S), % 0 to 0.025
0 to 0.020
Vanadium (V), % 0
0.22 to 0.3