AISI 310S (S31008) Stainless Steel
AISI 310S stainless steel is an austenitic stainless steel formulated for primary forming into wrought products. 310S is the AISI designation for this material. S31008 is the UNS number. Additionally, the British Standard (BS) designation is 310S24. And the AFNOR (French) designation is Z12CN25-20.
It has a moderately low electrical conductivity among wrought austenitic stainless steels. In addition, it has a moderately high base cost and a moderately high embodied energy.
The properties of AISI 310S stainless steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare AISI 310S stainless steel to: wrought austenitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Brinell Hardness
170 to 210
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
34 to 44 %
Fatigue Strength
250 to 280 MPa 36 to 41 x 103 psi
Poisson's Ratio
0.27
Shear Modulus
79 GPa 11 x 106 psi
Shear Strength
420 to 470 MPa 61 to 68 x 103 psi
Tensile Strength: Ultimate (UTS)
600 to 710 MPa 87 to 100 x 103 psi
Tensile Strength: Yield (Proof)
270 to 350 MPa 39 to 51 x 103 psi
Thermal Properties
Latent Heat of Fusion
310 J/g
Maximum Temperature: Corrosion
450 °C 830 °F
Maximum Temperature: Mechanical
1100 °C 2010 °F
Melting Completion (Liquidus)
1450 °C 2640 °F
Melting Onset (Solidus)
1400 °C 2550 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
16 W/m-K 9.0 BTU/h-ft-°F
Thermal Expansion
16 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.3 % IACS
Otherwise Unclassified Properties
Base Metal Price
25 % relative
Density
7.9 g/cm3 490 lb/ft3
Embodied Carbon
4.3 kg CO2/kg material
Embodied Energy
61 MJ/kg 26 x 103 BTU/lb
Embodied Water
190 L/kg 23 gal/lb
Common Calculations
PREN (Pitting Resistance)
25
Resilience: Ultimate (Unit Rupture Work)
200 to 220 MJ/m3
Resilience: Unit (Modulus of Resilience)
190 to 310 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
21 to 25 points
Strength to Weight: Bending
20 to 22 points
Thermal Diffusivity
4.1 mm2/s
Thermal Shock Resistance
14 to 16 points
Alloy Composition
Among wrought stainless steels, the composition of AISI 310S stainless steel is notable for containing comparatively high amounts of chromium (Cr) and nickel (Ni). Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion resistance. Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion.
| Fe | 48.3 to 57 | |
| Cr | 24 to 26 | |
| Ni | 19 to 22 | |
| Mn | 0 to 2.0 | |
| Si | 0 to 1.5 | |
| C | 0 to 0.080 | |
| P | 0 to 0.045 | |
| S | 0 to 0.030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A276: Standard Specification for Stainless Steel Bars and Shapes
ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
Corrosion of Austenitic Stainless Steels: Mechanism, Mitigation and Monitoring, H. S. Khatak and B. Raj (editors), 2002
Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011
Austenitic Stainless Steels: Microstructure and Mechanical Properties, P. Marshall, 1984
Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993
ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015