UNS S13800 (PH 13-8 Mo, XM-13) Stainless Steel
S13800 stainless steel is a precipitation-hardening stainless steel formulated for primary forming into wrought products. XM-13 is the ASTM designation for this material. S13800 is the UNS number. And PH 13-8 Mo is the common industry name.
The properties of S13800 stainless steel include seven common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare S13800 stainless steel to: wrought precipitation-hardening 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
290 to 480
Elastic (Young's, Tensile) Modulus
200 GPa 28 x 106 psi
Elongation at Break
11 to 18 %
Fatigue Strength
410 to 870 MPa 59 to 130 x 103 psi
Poisson's Ratio
0.28
Reduction in Area
39 to 62 %
Rockwell C Hardness
30 to 51
Shear Modulus
77 GPa 11 x 106 psi
Shear Strength
610 to 1030 MPa 88 to 150 x 103 psi
Tensile Strength: Ultimate (UTS)
980 to 1730 MPa 140 to 250 x 103 psi
Tensile Strength: Yield (Proof)
660 to 1580 MPa 95 to 230 x 103 psi
Thermal Properties
Latent Heat of Fusion
280 J/g
Maximum Temperature: Corrosion
390 °C 740 °F
Maximum Temperature: Mechanical
810 °C 1490 °F
Melting Completion (Liquidus)
1450 °C 2650 °F
Melting Onset (Solidus)
1410 °C 2570 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
16 W/m-K 9.3 BTU/h-ft-°F
Thermal Expansion
11 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.3 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.6 % IACS
Otherwise Unclassified Properties
Base Metal Price
15 % relative
Density
7.9 g/cm3 490 lb/ft3
Embodied Carbon
3.4 kg CO2/kg material
Embodied Energy
46 MJ/kg 20 x 103 BTU/lb
Embodied Water
140 L/kg 16 gal/lb
Common Calculations
PREN (Pitting Resistance)
21
Resilience: Ultimate (Unit Rupture Work)
150 to 190 MJ/m3
Resilience: Unit (Modulus of Resilience)
1090 to 5490 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
35 to 61 points
Strength to Weight: Bending
28 to 41 points
Thermal Diffusivity
4.3 mm2/s
Thermal Shock Resistance
33 to 58 points
Alloy Composition
Among wrought stainless steels, the composition of S13800 stainless steel is notable for including aluminum (Al). Aluminum is used to improve oxidation resistance. It can also enhance the effects of heat treatment.
| Fe | 73.6 to 77.3 | |
| Cr | 12.3 to 13.2 | |
| Ni | 7.5 to 8.5 | |
| Mo | 2.0 to 3.0 | |
| Al | 0.9 to 1.4 | |
| Mn | 0 to 0.2 | |
| Si | 0 to 0.1 | |
| C | 0 to 0.050 | |
| P | 0 to 0.010 | |
| N | 0 to 0.010 | |
| S | 0 to 0.0080 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A564: Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes
ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
Corrosion of Stainless Steels, A. John Sedriks, 1996
ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010