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EN 1.4122 Stainless Steel vs. EN 1.4451 Stainless Steel

Both EN 1.4122 stainless steel and EN 1.4451 stainless steel are iron alloys. They have 80% 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 1.4122 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, % 14
25
Fatigue Strength, MPa 260 to 360
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 790 to 850
750
Tensile Strength: Yield (Proof), MPa 450 to 630
540

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 400
450
Maximum Temperature: Mechanical, °C 870
1100
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
17
Thermal Expansion, µm/m-K 10
17

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
3.8
Embodied Energy, MJ/kg 33
53
Embodied Water, L/kg 120
190

Common Calculations

PREN (Pitting Resistance) 20
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 93 to 110
170
Resilience: Unit (Modulus of Resilience), kJ/m3 520 to 1000
710
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 31
27
Strength to Weight: Bending, points 25 to 26
23
Thermal Diffusivity, mm2/s 4.0
4.5
Thermal Shock Resistance, points 28 to 30
16

Alloy Composition

Carbon (C), % 0.33 to 0.45
0 to 0.030
Chromium (Cr), % 15.5 to 17.5
25 to 27
Copper (Cu), % 0
2.8 to 3.5
Iron (Fe), % 77.2 to 83.4
56.2 to 64.6
Manganese (Mn), % 0 to 1.5
0 to 1.5
Molybdenum (Mo), % 0.8 to 1.3
2.5 to 3.5
Nickel (Ni), % 0 to 1.0
5.0 to 7.0
Nitrogen (N), % 0
0.12 to 0.22
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.025