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S17700 Stainless Steel vs. AISI 440A Stainless Steel

Both S17700 stainless steel and AISI 440A stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 31 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 S17700 stainless steel and the bottom bar is AISI 440A stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 1.0 to 23
5.0 to 20
Fatigue Strength, MPa 290 to 560
270 to 790
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 740 to 940
450 to 1040
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
730 to 1790
Tensile Strength: Yield (Proof), MPa 430 to 1210
420 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 410
400
Maximum Temperature: Mechanical, °C 890
760
Melting Completion (Liquidus), °C 1440
1480
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
23
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.2
Embodied Energy, MJ/kg 40
31
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 17
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
87 to 120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 42 to 59
26 to 65
Strength to Weight: Bending, points 32 to 40
23 to 43
Thermal Diffusivity, mm2/s 4.1
6.2
Thermal Shock Resistance, points 39 to 54
26 to 65

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
0
Carbon (C), % 0 to 0.090
0.6 to 0.75
Chromium (Cr), % 16 to 18
16 to 18
Iron (Fe), % 70.5 to 76.8
78.4 to 83.4
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 6.5 to 7.8
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015

Comparable Variants