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AISI 204 Stainless Steel vs. AISI 317 Stainless Steel

Both AISI 204 stainless steel and AISI 317 stainless steel are iron alloys. They have 83% of their average alloy composition in common.

For each property being compared, the top bar is AISI 204 stainless steel and the bottom bar is AISI 317 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 330
170 to 220
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23 to 39
35 to 55
Fatigue Strength, MPa 320 to 720
250 to 330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Shear Strength, MPa 500 to 700
420 to 470
Tensile Strength: Ultimate (UTS), MPa 730 to 1100
580 to 710
Tensile Strength: Yield (Proof), MPa 380 to 1080
250 to 420

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 850
590
Melting Completion (Liquidus), °C 1410
1400
Melting Onset (Solidus), °C 1370
1380
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
21
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.4
4.3
Embodied Energy, MJ/kg 35
59
Embodied Water, L/kg 130
160

Common Calculations

PREN (Pitting Resistance) 20
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240 to 250
210 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 360 to 2940
150 to 430
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 40
20 to 25
Strength to Weight: Bending, points 24 to 31
20 to 22
Thermal Diffusivity, mm2/s 4.1
4.1
Thermal Shock Resistance, points 16 to 24
12 to 15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 15 to 17
18 to 20
Iron (Fe), % 69.6 to 76.4
58 to 68
Manganese (Mn), % 7.0 to 9.0
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 1.5 to 3.0
11 to 15
Nitrogen (N), % 0.15 to 0.3
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