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EN 1.4474 Stainless Steel vs. EN 1.4451 Stainless Steel

Both EN 1.4474 stainless steel and EN 1.4451 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a very high 95% 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 1.4474 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, % 23
25
Fatigue Strength, MPa 320
370
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 670
750
Tensile Strength: Yield (Proof), MPa 480
540

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 450
450
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
17
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 17
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.4
3.8
Embodied Energy, MJ/kg 48
53
Embodied Water, L/kg 170
190

Common Calculations

PREN (Pitting Resistance) 34
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
170
Resilience: Unit (Modulus of Resilience), kJ/m3 560
710
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
27
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 4.6
4.5
Thermal Shock Resistance, points 18
16

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.030
Chromium (Cr), % 25 to 27
25 to 27
Copper (Cu), % 0
2.8 to 3.5
Iron (Fe), % 61.2 to 69.1
56.2 to 64.6
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 1.3 to 2.0
2.5 to 3.5
Nickel (Ni), % 4.5 to 6.5
5.0 to 7.0
Nitrogen (N), % 0.12 to 0.2
0.12 to 0.22
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.025