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EN 1.4550 Stainless Steel vs. EN 1.4507 Stainless Steel

Both EN 1.4550 stainless steel and EN 1.4507 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 87% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4550 stainless steel and the bottom bar is EN 1.4507 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 42
25
Fatigue Strength, MPa 210
410
Impact Strength: V-Notched Charpy, J 90
90
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Shear Strength, MPa 430
530
Tensile Strength: Ultimate (UTS), MPa 620
840
Tensile Strength: Yield (Proof), MPa 230
590

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 480
450
Maximum Temperature: Mechanical, °C 940
1100
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 18
21
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
4.0
Embodied Energy, MJ/kg 51
55
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 18
41
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
190
Resilience: Unit (Modulus of Resilience), kJ/m3 140
850
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
30
Strength to Weight: Bending, points 21
25
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 14
23

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 17 to 19
24 to 26
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 64.9 to 74
56.4 to 65.8
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 9.0 to 12
6.0 to 8.0
Niobium (Nb), % 0 to 1.0
0
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.015