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EN 1.4451 Stainless Steel vs. AISI 312 Stainless Steel

Both EN 1.4451 stainless steel and AISI 312 stainless steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4451 stainless steel and the bottom bar is AISI 312 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
28
Fatigue Strength, MPa 370
370
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 750
780
Tensile Strength: Yield (Proof), MPa 540
510

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 1380
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
16
Thermal Expansion, µm/m-K 17
13

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 39
33
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
190
Resilience: Unit (Modulus of Resilience), kJ/m3 710
640
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
28
Strength to Weight: Bending, points 23
24
Thermal Diffusivity, mm2/s 4.5
4.3
Thermal Shock Resistance, points 16
21

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 25 to 27
24 to 26
Copper (Cu), % 2.8 to 3.5
0
Iron (Fe), % 56.2 to 64.6
62.2 to 69.2
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
1.2 to 2.0
Nickel (Ni), % 5.0 to 7.0
5.5 to 6.5
Nitrogen (N), % 0.12 to 0.22
0.14 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030