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AISI 312 Stainless Steel vs. AISI 415 Stainless Steel

Both AISI 312 stainless steel and AISI 415 stainless steel are iron alloys. They have 85% of their average alloy composition in common.

For each property being compared, the top bar is AISI 312 stainless steel and the bottom bar is AISI 415 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 28
17
Fatigue Strength, MPa 370
430
Poisson's Ratio 0.27
0.28
Reduction in Area, % 56
50
Rockwell C Hardness 27
28
Shear Modulus, GPa 80
76
Shear Strength, MPa 510
550
Tensile Strength: Ultimate (UTS), MPa 780
900
Tensile Strength: Yield (Proof), MPa 510
700

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Corrosion, °C 450
390
Maximum Temperature: Mechanical, °C 1100
780
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
24
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 17
11
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.4
2.5
Embodied Energy, MJ/kg 48
35
Embodied Water, L/kg 170
110

Common Calculations

PREN (Pitting Resistance) 33
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
140
Resilience: Unit (Modulus of Resilience), kJ/m3 640
1250
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
32
Strength to Weight: Bending, points 24
26
Thermal Diffusivity, mm2/s 4.3
6.4
Thermal Shock Resistance, points 21
33

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.050
Chromium (Cr), % 24 to 26
11.5 to 14
Iron (Fe), % 62.2 to 69.2
77.8 to 84
Manganese (Mn), % 0 to 2.0
0.5 to 1.0
Molybdenum (Mo), % 1.2 to 2.0
0.5 to 1.0
Nickel (Ni), % 5.5 to 6.5
3.5 to 5.5
Nitrogen (N), % 0.14 to 0.2
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030