When properly annealed, Alloys 316 and 317L are primarily austenitic. Small quantities of ferrite may or may not be present. When slowly cooled or held in the temperature range 800 to 1500°F (427 to 816°C), carbides are precipitated and the structure consists of austenite plus carbides.
Melting Range: 2450 to 2630°F (1390 to 1440°C)
Density: 0.29 lb/in3 (8.027 g/cm3)
Modulus of Elasticity in Tension: 29 x 106 psi (200 Gpa)
Modulus of Shear: 11.9 x 106 psi (82 Gpa)
Coefficient of Linear Thermal Expansion
Temperature Range |
Coefficients |
| °F |
°C |
in/in/°F |
cm/cm/°C |
| 68 - 212 |
20 - 100 |
9.2 x 10-6 |
16.5 x 10-6 |
| 68 - 932 |
20 - 500 |
10.1 x 10-6 |
18.2 x 10-6 |
| 68 - 1832 |
20 - 1000 |
10.8 x 10-6 |
19.5 x 10-6 |
Thermal Conductivity
Temperature Range |
Btu•in/hr•ft2•°F |
W/m•K |
| °F |
°C |
| 68 - 212 |
20 - 100 |
100.8 |
14.6 |
The overall heat transfer coefficient of metals is determined by factors in addition to thermal conductivity of the metal. The ability of the 18-8 stainless steel pipe grades to maintain clean surface often allows better heat transfer than other metals having higher thermal conductivity.
Specific Heat
| °F |
°C |
Btu/lb•°F |
Jkg•K |
| 68 |
20 |
0.108 |
450 |
| 200 |
93 |
0.116 |
485 |
Electrical Resistivity
| Alloy |
Value at 68°F (20°C) |
| Microhm-in. |
Microhm-cm. |
| 316 |
29.1 |
74.0 |
| 317 |
31.1 |
79.0 |
Magnetic Permeability
Austenitic stainless steel tube are non-magnetic in the annealed, fully austenitic condition. The magnetic permeability of the Alloys 316 and 317L in the annealed condition is generally less than 1.02 at 200 H (oersteds). Permeability values for cold deformed material vary with composition and the amount of cold deformation but are usually higher than that for annealed material.
Back to 316L
Physical Properties of Stainless Steel
General Properties
Chemical Composition
Resistance to Corrosion
Physical Properties
Mechanical Properties
Oxidation Resistance
Heat Treatment
Fabrication
Comparison Grade 316 316L 316Ti
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