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EN 1.4404 Stainless Steel vs. EN 1.7720 Steel

Both EN 1.4404 stainless steel and EN 1.7720 steel are iron alloys. They have 69% of their average alloy composition in common. 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 1.4404 stainless steel and the bottom bar is EN 1.7720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14 to 43
19
Fatigue Strength, MPa 220 to 320
230
Impact Strength: V-Notched Charpy, J 91 to 93
30
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 600 to 900
590
Tensile Strength: Yield (Proof), MPa 240 to 570
340

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 950
410
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 15
40
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.8
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 3.8
2.2
Embodied Energy, MJ/kg 52
30
Embodied Water, L/kg 150
51

Common Calculations

PREN (Pitting Resistance) 26
2.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 210
97
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 800
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 32
21
Strength to Weight: Bending, points 20 to 26
20
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 13 to 20
17

Alloy Composition

Carbon (C), % 0 to 0.030
0.1 to 0.15
Chromium (Cr), % 16.5 to 18.5
0.3 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 62.8 to 71.5
96.6 to 98.6
Manganese (Mn), % 0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 2.0 to 2.5
0.4 to 0.6
Nickel (Ni), % 10 to 13
0 to 0.4
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.45
Sulfur (S), % 0 to 0.015
0 to 0.020
Vanadium (V), % 0
0.22 to 0.3