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S17400 Stainless Steel vs. EN 1.7720 Steel

Both S17400 stainless steel and EN 1.7720 steel are iron alloys. They have 76% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is EN 1.7720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 440
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 21
19
Fatigue Strength, MPa 380 to 670
230
Impact Strength: V-Notched Charpy, J 7.6 to 86
30
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
590
Tensile Strength: Yield (Proof), MPa 580 to 1250
340

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 850
410
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
40
Thermal Expansion, µm/m-K 11
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 14
2.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.7
2.2
Embodied Energy, MJ/kg 39
30
Embodied Water, L/kg 130
51

Common Calculations

PREN (Pitting Resistance) 16
2.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
97
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 49
21
Strength to Weight: Bending, points 27 to 35
20
Thermal Diffusivity, mm2/s 4.5
11
Thermal Shock Resistance, points 30 to 46
17

Alloy Composition

Carbon (C), % 0 to 0.070
0.1 to 0.15
Chromium (Cr), % 15 to 17
0.3 to 0.5
Copper (Cu), % 3.0 to 5.0
0 to 0.3
Iron (Fe), % 70.4 to 78.9
96.6 to 98.6
Manganese (Mn), % 0 to 1.0
0.4 to 0.7
Molybdenum (Mo), % 0
0.4 to 0.6
Nickel (Ni), % 3.0 to 5.0
0 to 0.4
Niobium (Nb), % 0.15 to 0.45
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.020
Vanadium (V), % 0
0.22 to 0.3