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S15700 Stainless Steel vs. AISI 321 Stainless Steel

Both S15700 stainless steel and AISI 321 stainless steel are iron alloys. They have a moderately high 93% 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 321 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 460
170 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 1.1 to 29
34 to 50
Fatigue Strength, MPa 370 to 770
220 to 270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 770 to 1070
420 to 460
Tensile Strength: Ultimate (UTS), MPa 1180 to 1890
590 to 690
Tensile Strength: Yield (Proof), MPa 500 to 1770
220 to 350

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 400
480
Maximum Temperature: Mechanical, °C 870
870
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 15
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.4
3.2
Embodied Energy, MJ/kg 47
45
Embodied Water, L/kg 140
140

Common Calculations

PREN (Pitting Resistance) 23
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 270
190 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 640 to 4660
130 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 42 to 67
21 to 25
Strength to Weight: Bending, points 32 to 43
20 to 22
Thermal Diffusivity, mm2/s 4.2
4.1
Thermal Shock Resistance, points 39 to 63
13 to 15

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
0
Carbon (C), % 0 to 0.090
0 to 0.080
Chromium (Cr), % 14 to 16
17 to 19
Iron (Fe), % 69.6 to 76.8
65.3 to 74
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 6.5 to 7.7
9.0 to 12
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0 to 0.7

Comparable Variants