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EN 1.4938 Stainless Steel vs. EN 1.4981 Stainless Steel

Both EN 1.4938 stainless steel and EN 1.4981 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, 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 EN 1.4981 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 17
39
Fatigue Strength, MPa 390 to 520
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 540 to 630
420
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
610
Tensile Strength: Yield (Proof), MPa 640 to 870
240

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
520
Maximum Temperature: Mechanical, °C 750
940
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 30
16
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
25
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.3
4.8
Embodied Energy, MJ/kg 47
67
Embodied Water, L/kg 110
150

Common Calculations

PREN (Pitting Resistance) 18
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
190
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31 to 37
21
Strength to Weight: Bending, points 26 to 29
20
Thermal Diffusivity, mm2/s 8.1
4.3
Thermal Shock Resistance, points 30 to 35
14

Alloy Composition

Carbon (C), % 0.080 to 0.15
0.040 to 0.1
Chromium (Cr), % 11 to 12.5
15.5 to 17.5
Iron (Fe), % 80.5 to 84.8
59.6 to 66.7
Manganese (Mn), % 0.4 to 0.9
0 to 1.5
Molybdenum (Mo), % 1.5 to 2.0
1.6 to 2.0
Nickel (Ni), % 2.0 to 3.0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.5
0.3 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0.25 to 0.4
0