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EN 1.4938 Stainless Steel vs. S17400 Stainless Steel

Both EN 1.4938 stainless steel and S17400 stainless steel are iron alloys. They have 90% 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 EN 1.4938 stainless steel and the bottom bar is S17400 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 16 to 17
11 to 21
Fatigue Strength, MPa 390 to 520
380 to 670
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
75
Shear Strength, MPa 540 to 630
570 to 830
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
910 to 1390
Tensile Strength: Yield (Proof), MPa 640 to 870
580 to 1250

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 390
450
Maximum Temperature: Mechanical, °C 750
850
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 30
17
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
14
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.3
2.7
Embodied Energy, MJ/kg 47
39
Embodied Water, L/kg 110
130

Common Calculations

PREN (Pitting Resistance) 18
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
880 to 4060
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 37
32 to 49
Strength to Weight: Bending, points 26 to 29
27 to 35
Thermal Diffusivity, mm2/s 8.1
4.5
Thermal Shock Resistance, points 30 to 35
30 to 46

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.070
Chromium (Cr), % 11 to 12.5
15 to 17
Copper (Cu), % 0
3.0 to 5.0
Iron (Fe), % 80.5 to 84.8
70.4 to 78.9
Manganese (Mn), % 0.4 to 0.9
0 to 1.0
Molybdenum (Mo), % 1.5 to 2.0
0
Nickel (Ni), % 2.0 to 3.0
3.0 to 5.0
Niobium (Nb), % 0
0.15 to 0.45
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.25 to 0.4
0