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EN 1.4938 Stainless Steel vs. EN 1.4646 Stainless Steel

Both EN 1.4938 stainless steel and EN 1.4646 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 1.4646 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 17
34
Fatigue Strength, MPa 390 to 520
340
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 540 to 630
500
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
750
Tensile Strength: Yield (Proof), MPa 640 to 870
430

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 750
910
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1420
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 11
17

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.3
2.8
Embodied Energy, MJ/kg 47
41
Embodied Water, L/kg 110
160

Common Calculations

PREN (Pitting Resistance) 18
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
460
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 37
27
Strength to Weight: Bending, points 26 to 29
24
Thermal Shock Resistance, points 30 to 35
16

Alloy Composition

Carbon (C), % 0.080 to 0.15
0.020 to 0.1
Chromium (Cr), % 11 to 12.5
17 to 19
Copper (Cu), % 0
1.5 to 3.0
Iron (Fe), % 80.5 to 84.8
59 to 67.3
Manganese (Mn), % 0.4 to 0.9
10.5 to 12.5
Molybdenum (Mo), % 1.5 to 2.0
0 to 0.5
Nickel (Ni), % 2.0 to 3.0
3.5 to 4.5
Nitrogen (N), % 0.020 to 0.040
0.2 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.050
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0.25 to 0.4
0