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S31803 Stainless Steel vs. EN 1.4438 Stainless Steel

Both S31803 stainless steel and EN 1.4438 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S31803 stainless steel and the bottom bar is EN 1.4438 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 29
41
Fatigue Strength, MPa 370
220
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
79
Shear Strength, MPa 460
420
Tensile Strength: Ultimate (UTS), MPa 710
620
Tensile Strength: Yield (Proof), MPa 500
250

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 430
420
Maximum Temperature: Mechanical, °C 1060
1000
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
22
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.6
4.4
Embodied Energy, MJ/kg 49
60
Embodied Water, L/kg 160
160

Common Calculations

PREN (Pitting Resistance) 34
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
200
Resilience: Unit (Modulus of Resilience), kJ/m3 630
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
22
Strength to Weight: Bending, points 23
20
Thermal Diffusivity, mm2/s 4.3
3.7
Thermal Shock Resistance, points 20
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 21 to 23
17.5 to 19.5
Iron (Fe), % 63.7 to 71.9
57.3 to 66.5
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
3.0 to 4.0
Nickel (Ni), % 4.5 to 6.5
13 to 16
Nitrogen (N), % 0.080 to 0.2
0 to 0.1
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.015