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EN 1.4938 Stainless Steel vs. EN 1.4451 Stainless Steel

Both EN 1.4938 stainless steel and EN 1.4451 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 1.4451 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 17
25
Fatigue Strength, MPa 390 to 520
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
750
Tensile Strength: Yield (Proof), MPa 640 to 870
540

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 390
450
Maximum Temperature: Mechanical, °C 750
1100
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 30
17
Thermal Expansion, µm/m-K 11
17

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
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.3
3.8
Embodied Energy, MJ/kg 47
53
Embodied Water, L/kg 110
190

Common Calculations

PREN (Pitting Resistance) 18
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
170
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
710
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
23
Thermal Diffusivity, mm2/s 8.1
4.5
Thermal Shock Resistance, points 30 to 35
16

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.030
Chromium (Cr), % 11 to 12.5
25 to 27
Copper (Cu), % 0
2.8 to 3.5
Iron (Fe), % 80.5 to 84.8
56.2 to 64.6
Manganese (Mn), % 0.4 to 0.9
0 to 1.5
Molybdenum (Mo), % 1.5 to 2.0
2.5 to 3.5
Nickel (Ni), % 2.0 to 3.0
5.0 to 7.0
Nitrogen (N), % 0.020 to 0.040
0.12 to 0.22
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.025
Vanadium (V), % 0.25 to 0.4
0