Stainless Steel 15-5PH is a precipitation-hardening martensitic stainless steel known for its excellent combination of high strength, toughness, and corrosion resistance. It can be heat treated to achieve superior mechanical properties while maintaining moderate hardness and dimensional stability. Grade 15-5PH is widely used in aerospace components, chemical processing equipment, pump and valve parts, and structural assemblies where reliable performance under mechanical stress and corrosive environments is critical. Its versatility and high strength make it ideal for demanding industrial and high-performance applications.
CHEMICAL COMPOSITION OF STAINLESS STEEL 15-5PH ROUND BAR
Grade
C %
Cr %
Ni %
Cu %
Mn %
Si %
P %
S %
Cb+Ta %
Fe
15-5PH
0.07 max
14.0 – 15.5
3.5 – 5.5
2.5 – 4.5
1.00 max
1.00 max
0.040 max
0.030 max
0.15 – 0.45
Balance
MECHANICAL PROPERTIES OF STAINLESS STEEL 15-5PH ROUND BAR
Condition
Tensile Strength ksi (MPa)
Yield Strength 0.2% ksi (MPa)
Elongation %
Hardness (Rockwell C)
H900 (Typical)
160 (1100)
140 (965)
7 – 8
38 – 44 HRC
💡 Practical Difference in Use
Use Stainless Steel 15-5PH Round Bars when: high strength, excellent corrosion resistance, moderate hardness, and good toughness are required. SS 15-5PH is a precipitation-hardening martensitic stainless steel that can be heat treated to achieve high strength while maintaining corrosion resistance, making it ideal for aerospace, chemical, and structural applications.
→ Example: aircraft components, chemical processing equipment, pump parts, valve stems, shafts, structural machinery parts, and high-strength fasteners.
Heat Treated / Bright Finished Stainless Steel 15-5PH Round Bars when: precise mechanical properties, consistent surface finish, and dimensional stability are required for high-performance components. Bright drawn or ground bars ensure tight tolerances and smooth surfaces, while aging or heat treatment enhances strength, toughness, and wear resistance.
→ Example: aerospace shafts, precision pump components, CNC machined parts, valve sleeves, structural assemblies, and high-strength fasteners.
Applications of Stainless Steel 15-5PH Round Bars
Stainless Steel 15-5PH round bars are widely used in aerospace, chemical, structural, and precision equipment industries where high strength, corrosion resistance, and dependable mechanical properties are essential.
