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S15700 Stainless Steel vs. AISI 420F Stainless Steel

Both S15700 stainless steel and AISI 420F stainless steel are iron alloys. They have 88% of their average alloy composition in common.

For each property being compared, the top bar is S15700 stainless steel and the bottom bar is AISI 420F stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 460
230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 1.1 to 29
18
Fatigue Strength, MPa 370 to 770
270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 770 to 1070
460
Tensile Strength: Ultimate (UTS), MPa 1180 to 1890
740
Tensile Strength: Yield (Proof), MPa 500 to 1770
430

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 400
390
Maximum Temperature: Mechanical, °C 870
760
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
25
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 15
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.4
2.0
Embodied Energy, MJ/kg 47
28
Embodied Water, L/kg 140
100

Common Calculations

PREN (Pitting Resistance) 23
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 270
120
Resilience: Unit (Modulus of Resilience), kJ/m3 640 to 4660
480
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 42 to 67
27
Strength to Weight: Bending, points 32 to 43
23
Thermal Diffusivity, mm2/s 4.2
6.8
Thermal Shock Resistance, points 39 to 63
27

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
0
Carbon (C), % 0 to 0.090
0.3 to 0.4
Chromium (Cr), % 14 to 16
12 to 14
Iron (Fe), % 69.6 to 76.8
82.4 to 87.6
Manganese (Mn), % 0 to 1.0
0 to 1.3
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.5
Nickel (Ni), % 6.5 to 7.7
0
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0.15 to 0.35