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Stainless Steel 15-5
Material Type
Metal
Material Name
Stainless Steel 15-5
Alternative Names
S15500 | 1.4545 | X5CrNiCu15-5
Process Compatibility
CNC Milling, CNC Turning
introduction
Stainless Steel 15-5 in CNC Machining
Stainless Steel 15-5, also known as 15-5 PH, is a martensitic precipitation-hardening stainless steel alloy. It has high strength, good corrosion resistance, and excellent toughness.
When machining Stainless Steel 15-5, we have several considerations to ensure the best results. We use coated carbide tools or high-speed steel (HSS) and coolants. We maintain appropriate cutting speeds and optimize feed rates. We ensure effective chip evacuation and use climb milling techniques. Though it cannot be anodized, we do post-machine operations like surface finishing, hot working, age hardening, and annealing. We use heat treatments to enhance its properties.
Stainless steel 15-5 has a chemical composition of around 14.0-15.5% chromium, 3.5-5.5% nickel, and 2.5-4.5% copper. Additional elements include manganese (up to 1.0%), silicon (up to 1.0%), and trace amounts of phosphorus and sulfur. The alloy also contains columbium (niobium) and tantalum in the range of 0.15-0.45%. Carbon is limited to 0.07% or less, and the balance is iron.
Properties
Properties Table of Stainless Steel 15-5
| MECHANICAL PROPERTIES | |
|---|---|
| Ultimate Tensile Strength | 890-1200 MPa |
| Yield Strength | 590-890 MPa |
| Young's Modulus(Elasticity) | 190-196 GPa |
| Elongation at Break | 7-16 % |
| Physical Properties | |
| Corrosion Resistance | Good |
| Magnetism | Magnetic |
| Weldability | Good |
| Thermal Properties | |
| Maximum Service Temperature | 820 °C |
| Thermal Expansion Coefficient | 10.4-11.7 x 10^-6/°C |
| Thermal Conductivity | 17-22 W/(m·°C) |
| Electrical Properties | |
| Electrical Resistivity | 77 μΩ*cm |
TECHNOLOGY OVERVIEW
Basic Knowledge of Stainless Steel 15-5
What is Stainless Steel 15-5?
Stainless Steel 15-5 is a precipitation-hardening, martensitic stainless steel alloy. It is also known by other trade names, such as UNS S15500 or XM-12. The "15-5" designation indicates it contains approximately 15% chromium and 5% nickel. This alloy has excellent corrosion resistance, high strength, and good toughness.
One of the notable features of Stainless Steel 15-5 is its ability to be precipitation-hardened through heat treatment. This involves a two-step process: first, the alloy is solution-treated at a high temperature and then aged at a lower temperature to achieve the desired mechanical properties. This process enhances the strength of the material while maintaining its corrosion resistance.
Advantages of Stainless Steel 15-5
- Excellent resistance to corrosion in various environments.
- Achieves high strength through precipitation hardening.
- Maintains good toughness, suitable for impact or dynamic loading.
- Relatively easy to machine, weld, and form.
- Retains strength and properties at elevated temperatures.
- Can be strengthened through heat treatment.
- Used in aerospace, chemical processing, petrochemical, and more.
- Corrosion resistance contributes to durability and long-term use.
Applications of Stainless Steel 15-5
- Aircraft components (landing gear, structural elements)
- Oil and gas industry components (valves, pumps, drilling equipment)
- Medical devices (surgical instruments)
- Chemical and petrochemical industry facilities
- Valve and pump components
- Food processing equipment (tanks, conveyors)
- Marine applications (boat fittings, fasteners)
- Power generation components (turbines, generator parts)
FAQ
Machining Stainless Steel 15-5 Buying FAQ
15-5 and 17-4 are both types of stainless steel, differing mainly in their chemical composition. 15-5 offers higher toughness and corrosion resistance due to more copper and less chromium, while 17-4 provides greater strength.
15-5 stainless steel is resistant to rust and corrosion. However, proper care is still important to maintain its corrosion-resistant properties over time.
Yes, 15-5 stainless steel is weldable using common techniques. It is recommended to use matching filler metals, and post-weld heat treatment may be needed to restore its precipitation-hardening properties.
15-5PH stainless steel exhibits good wear resistance. Heat treatment, surface finish, and specific application conditions can influence its precipitation-hardening capability, strength, and wear resistance.
Other Materials
Stainless Steel 420
Stainless Steel 420 is a type of strong and hard martensitic stainless steel with high durability.
More info about Stainless Steel 420
Stainless Steel 430
Stainless Steel 430 is a ferritic, non-hardenable grade with good corrosion resistance, ductility, and formability.
More info about Stainless Steel 430
Stainless Steel 17-4 PH
Stainless steel 17-4 PH is a strong and durable alloy that can be hardened through aging at different temperatures.
More info about Stainless Steel 17-4 PH
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