Custom 465® Stainless Steel Bar - ASTM F 899 - AMS 5936
Custom 465® is a premium melted, martensitic, age-hardenable stainless steel alloy. This material was designed with improved tensile strength, fracture toughness, improved fabricability, and excellent resistance to stress corrosion cracking. It has been used in the medical industry, oil and gas drilling, aerospace components, marine equipment, firearms and hand tools.
- Inventory & Specs
- Chemical Composition
- Physical Properties
- Mechanical Properties
- Datasheet
- Additional Info
- FAQs
Inventory Size Ranges for Custom 465®
| Type | Thickness | AMS Standards | ASTM | UNS | Get a Quote |
|---|---|---|---|---|---|
| Bar | 0.125" - 1.250" | AMS 5936 | ASTM F 899 | UNS S46500 | Get a Quote |
Characteristics of Custom 465®
Custom 465® stainless steel is a premium‑melted, ultra‑high‑strength precipitation‑hardening stainless alloy known for exceptional tensile strength (250+ ksi), excellent fracture toughness, and corrosion resistance comparable to 304 stainless. Custom 465® is capable of ultimate tensile strength >250 ksi in the H950 condition. This alloy was designed for excellent notch tensile strength and fracture toughness at high strength levels. The corrosion resistance of Custom 465® is nearly equivalent to 304 stainless in many environments and offers excellent resistance to stress corrosion cracking, especially in the H1000 condition. This alloy is a martensitic precipitation hardening stainless steel, which ensures toughness and fatigue resistance.
Working with Custom 465®
In the solution-annealed condition, this alloy offers good machinability, formability, and weldability. After aging, it becomes significantly harder to machine. If machining is necessary, machine before aging whenever possible and use carbide tooling for best tool life. It is also recommended to reduce cutting speeds as hardness increases and to use generous coolant to control heat and avoid work hardening. Custom 465® has good formability when in the annealed state. Bending, cold working, and shaping should be performed before aging. For tight bends, consider warm forming to reduce springback. Heat treatment for Custom 465® includes solution treating, which produces a soft, martensitic structure suitable for machining and forming, and age hardening, a single strep aging treatment that produces extremely high strength. The most common aging conditions for the alloy are H950, which offers maximum strength, H1000, with provides the best toughness and stress corrosion cracking resistance, and H1050/H1100, which has a lower strength but higher ductility. Custom 465® is weldable, but it is best welded in the solution-annealed condition. After welding, perform post-weld aging to restore strength. It is best to avoid welding in the aged condition, as this may lead to an increased risk of cracking.
Other industry standards we comply with:
Common Trade Names
- Custom 465 (® Carpenter Technology Corporation)
- CarTech® Custom 465® Stainless
- Alloy 465
Industry Applications for Custom 465®
- Surgical instruments for orthopedic, spinal, & dental markets
- Drill bits
- Drivers
- Distractors
- Shafts
- Aerospace
- Oil and gas
- Sports equipment
Chemical Composition
| Element | Min | Max | |
|---|---|---|---|
| Mn | Manganese | - | 0.50 |
| S | Sulfur | - | 0.030 |
| Cr | Chromium | 11.00 | 12.50 |
| Mo | Molybdenum | - | 0.50 |
| Ti | Titanium | 0.80 | 1.40 |
| Fe | Iron | - | Balance |
| C | Carbon | - | 0.05 |
| P | Phosphorous | - | 0.040 |
| Soi | Silicon | - | 0.50 |
| Ni | Nickel | 7.50 | 9.50 |
| Cu | Copper | 1.50 | 2.50 |
| Nb/Ta | Columbium & Tantalum | 0.10 | 0.50 |
Physical Properties
| Density Condition | g/cm3 |
|---|---|
| Annealed/CT | 7.81 |
| H900 | 7.82 |
| H950 | 7.83 |
| H1000 | 7.84 |
| H1050 | 7.86 |
| H1100 | 7.86 |
Mechanical Properties
| Property | Value |
|---|---|
| Condition | H950 |
| Yield Strength, MPa (ksi) | 1648 (239) |
| Ultimate Tensile Strength, MPa (ksi) | 1751 (254) |
| Elongation | 14% |
| Reduction in Area | 63% |
| Fracture Toughness | 98 (89) |
| Charpy V-Notch Energy, J (ft-lb) | 27 (20) |
Datasheet
Additional Info
A Brief History of Custom 465®
Custom 465® (UNS S46500) was introduced by Carpenter Technology as an advancement over earlier PH stainless steels such as Custom 455® and 13-8. It was engineered to achieve ultimate tensile strength above 250 ksi in the H950 condition. Carpenter designed it to provide excellent notch tensile strength and fracture toughness, outperforming previous high‑strength stainless alloys. The alloy was also intended to offer stress‑corrosion‑cracking resistance superior to other PH steels when overaged to H1000. Custom 465® became widely recognized as one of the strongest commercially available stainless steels that still maintains corrosion resistance approaching 304 stainless.
How Custom 465® Was Developed
Carpenter developed Custom 465® to solve several limitations in existing high‑strength stainless steels, including high strength, improved stress corrosion cracking resistance, and the ability to maintain corrosion resistance close to 304 stainless in atmospheric and salt-spray environments. The chemistry of this element enabled martensitic matrix for strength, precipitation hardening, high toughness, and corrosion resistance. The alloy is premium melted, meaning vacuum melting routes are used to ensure purity and toughness.
Early Applications of Custom 465®
Because of its exceptional strength and corrosion resistance, early adopters were industries requiring high‑performance, lightweight, corrosion‑resistant components. Early applications included aerospace fasteners and structural components, landing gears, medical instruments, oil and gas drilling components, and high performance springs.
How Custom 465® is Used Today
Custom 465® remains one of the most widely used ultra‑high‑strength stainless steels in aerospace, medical, defense, and industrial markets.
- Aerospace: Fasteners, actuators, shafts, landing gear components, structural fittings
- Medical: Surgical instruments, orthopedic tools, dental tools
- Energy & Industrial: High strength shafts, valves, downhole tools
Your Trusted Supplier of Custom 465® Stainless
Our medical-grade Custom 465® stainless round bar is domestically melted and manufactured. We stock bar sizes 0.125" - 1.250". United Performance Metals is Approved ISO 13485 : 2016. This alloy is most commonly used in the medical industry for surgical instruments in the orthopedic, spinal and dental markets.
Product FAQs
Custom 465® offers higher ultimate tensile strength, fracture toughness, and stress corrosion cracking resistance compared to Custom 455®. Both grades offer similar corrosion resistance and Custom 455® has better fabrication abilities.
Custom 465® is capable of ultimate tensile strength above 250 ksi in the H950 condition. When overaged to H1000, it provides a superior combination of strength, toughness, and stress‑corrosion‑cracking resistance compared to Custom 455® or 13‑8 stainless.
In the solution‑annealed condition, machinability is similar to other PH stainless steels. After aging (H950/H1000), it becomes significantly harder and more difficult to machine due to its very high strength.