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EN 1.4646 Stainless Steel vs. EN 1.4451 Stainless Steel

Both EN 1.4646 stainless steel and EN 1.4451 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 86% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.4646 stainless steel and the bottom bar is EN 1.4451 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
220
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
25
Fatigue Strength, MPa 340
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 750
750
Tensile Strength: Yield (Proof), MPa 430
540

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
450
Maximum Temperature: Mechanical, °C 910
1100
Melting Completion (Liquidus), °C 1390
1430
Melting Onset (Solidus), °C 1340
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 17
17

Otherwise Unclassified Properties

Base Metal Price, % relative 13
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.8
3.8
Embodied Energy, MJ/kg 41
53
Embodied Water, L/kg 160
190

Common Calculations

PREN (Pitting Resistance) 23
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
170
Resilience: Unit (Modulus of Resilience), kJ/m3 460
710
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
27
Strength to Weight: Bending, points 24
23
Thermal Shock Resistance, points 16
16

Alloy Composition

Carbon (C), % 0.020 to 0.1
0 to 0.030
Chromium (Cr), % 17 to 19
25 to 27
Copper (Cu), % 1.5 to 3.0
2.8 to 3.5
Iron (Fe), % 59 to 67.3
56.2 to 64.6
Manganese (Mn), % 10.5 to 12.5
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
2.5 to 3.5
Nickel (Ni), % 3.5 to 4.5
5.0 to 7.0
Nitrogen (N), % 0.2 to 0.3
0.12 to 0.22
Phosphorus (P), % 0 to 0.050
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.025