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EN 1.4470 Stainless Steel vs. EN 1.4374 Stainless Steel

Both EN 1.4470 stainless steel and EN 1.4374 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a moderately high 91% 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 1.4470 stainless steel and the bottom bar is EN 1.4374 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
40
Fatigue Strength, MPa 320
340
Impact Strength: V-Notched Charpy, J 34
90
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
77
Tensile Strength: Ultimate (UTS), MPa 680
800
Tensile Strength: Yield (Proof), MPa 480
400

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 1060
920
Melting Completion (Liquidus), °C 1450
1400
Melting Onset (Solidus), °C 1400
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 18
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 17
14
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.6
2.9
Embodied Energy, MJ/kg 49
42
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 34
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
270
Resilience: Unit (Modulus of Resilience), kJ/m3 570
400
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
29
Strength to Weight: Bending, points 22
25
Thermal Diffusivity, mm2/s 4.8
4.0
Thermal Shock Resistance, points 18
17

Alloy Composition

Carbon (C), % 0 to 0.030
0.050 to 0.1
Chromium (Cr), % 21 to 23
17.5 to 18.5
Copper (Cu), % 0
0 to 0.4
Iron (Fe), % 63.7 to 71.9
63.5 to 67.9
Manganese (Mn), % 0 to 2.0
9.0 to 10
Molybdenum (Mo), % 2.5 to 3.5
0 to 0.5
Nickel (Ni), % 4.5 to 6.5
5.0 to 6.0
Nitrogen (N), % 0.12 to 0.2
0.25 to 0.32
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0.3 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.030