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EN 1.4162 Stainless Steel vs. EN 1.4550 Stainless Steel

Both EN 1.4162 stainless steel and EN 1.4550 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.

For each property being compared, the top bar is EN 1.4162 stainless steel and the bottom bar is EN 1.4550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 32
42
Fatigue Strength, MPa 410
210
Impact Strength: V-Notched Charpy, J 77
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 520
430
Tensile Strength: Ultimate (UTS), MPa 780
620
Tensile Strength: Yield (Proof), MPa 520
230

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 430
480
Maximum Temperature: Mechanical, °C 1000
940
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1370
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
18
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.6
3.6
Embodied Energy, MJ/kg 38
51
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 27
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
210
Resilience: Unit (Modulus of Resilience), kJ/m3 690
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
22
Strength to Weight: Bending, points 25
21
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 21
14

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.080
Chromium (Cr), % 21 to 22
17 to 19
Copper (Cu), % 0.1 to 0.8
0
Iron (Fe), % 67.2 to 73.3
64.9 to 74
Manganese (Mn), % 4.0 to 6.0
0 to 2.0
Molybdenum (Mo), % 0.1 to 0.8
0
Nickel (Ni), % 1.4 to 1.9
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Nitrogen (N), % 0.2 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015