UNS S45503 Stainless Steel
S45503 stainless steel is a precipitation-hardening stainless steel formulated for primary forming into wrought products. It can have a fairly high tensile strength and a moderately low ductility among wrought precipitation-hardening stainless steels.
The properties of S45503 stainless steel include three 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 S45503 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
410 to 500
Elastic (Young's, Tensile) Modulus
190 GPa 28 x 106 psi
Elongation at Break
4.6 to 6.8 %
Fatigue Strength
710 to 800 MPa 100 to 120 x 103 psi
Poisson's Ratio
0.28
Reduction in Area
17 to 28 %
Rockwell C Hardness
46 to 54
Shear Modulus
75 GPa 11 x 106 psi
Shear Strength
940 to 1070 MPa 140 to 160 x 103 psi
Tensile Strength: Ultimate (UTS)
1610 to 1850 MPa 230 to 270 x 103 psi
Tensile Strength: Yield (Proof)
1430 to 1700 MPa 210 to 250 x 103 psi
Thermal Properties
Latent Heat of Fusion
270 J/g
Maximum Temperature: Corrosion
640 °C 1190 °F
Maximum Temperature: Mechanical
760 °C 1400 °F
Melting Completion (Liquidus)
1440 °C 2630 °F
Melting Onset (Solidus)
1400 °C 2550 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
11 µm/m-K
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
48 MJ/kg 21 x 103 BTU/lb
Embodied Water
120 L/kg 14 gal/lb
Common Calculations
PREN (Pitting Resistance)
13
Resilience: Ultimate (Unit Rupture Work)
82 to 110 MJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
57 to 65 points
Strength to Weight: Bending
39 to 43 points
Thermal Shock Resistance
56 to 64 points
Alloy Composition
Among wrought stainless steels, the composition of S45503 stainless steel is notable for including titanium (Ti) and niobium (Nb). Titanium is used to broadly improve mechanical properties. Niobium is primarily used to improve yield strength, particularly at elevated temperatures.
| Fe | 72.4 to 78.9 | |
| Cr | 11 to 12.5 | |
| Ni | 7.5 to 9.5 | |
| Cu | 1.5 to 2.5 | |
| Ti | 1.0 to 1.4 | |
| Nb | 0.1 to 0.5 | |
| Mn | 0 to 0.5 | |
| Mo | 0 to 0.5 | |
| Si | 0 to 0.2 | |
| C | 0 to 0.010 | |
| P | 0 to 0.010 | |
| S | 0 to 0.010 |
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
Metallic Materials: Physical, Mechanical, and Corrosion Properties, Philip A. Schweitzer, 2003
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
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015