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EN 1.4371 Stainless Steel vs. EN 1.4446 Stainless Steel

Both EN 1.4371 stainless steel and EN 1.4446 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 32 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 1.4371 stainless steel and the bottom bar is EN 1.4446 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 230
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45 to 51
23
Fatigue Strength, MPa 290 to 340
160
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 740 to 750
490
Tensile Strength: Yield (Proof), MPa 320 to 340
240

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 880
980
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 17
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 12
22
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.6
4.5
Embodied Energy, MJ/kg 38
60
Embodied Water, L/kg 140
160

Common Calculations

PREN (Pitting Resistance) 20
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 310
93
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 300
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
17
Strength to Weight: Bending, points 24
17
Thermal Diffusivity, mm2/s 4.0
3.6
Thermal Shock Resistance, points 16
11

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 16 to 17.5
16.5 to 18.5
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 66.7 to 74.4
59.7 to 66.9
Manganese (Mn), % 6.0 to 8.0
0 to 1.5
Molybdenum (Mo), % 0
4.0 to 4.5
Nickel (Ni), % 3.5 to 5.5
12.5 to 14.5
Nitrogen (N), % 0.15 to 0.25
0.12 to 0.22
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030