Custom 465 Bars – UNS S46500 / AMS 5936
We supply Custom 465 (UNS S46500) round bar, bar stock, hex, flat, square and forged bar to AMS 5936, ASTM A564 and ASTM F899 – in the solution-treated condition ready for machining and aging to H950 or H1000 – with EN 10204 3.1 mill test certificates.
What is Custom 465 Stainless Steel?
Custom 465 (UNS S46500, often called 465 stainless steel) is a martensitic, precipitation-hardening stainless steel with about 11.5% chromium, 11% nickel, 1% molybdenum and 1.6% titanium. Titanium is the key: during aging it forms very fine nickel-titanium precipitates that give Custom 465 tensile strengths of about 1,600–1,770 MPa (230–256 ksi) – much higher than 17-4PH – while keeping good fracture toughness, ductility and stress-corrosion cracking resistance.
It is supplied soft (solution treated, Condition A) so it can be machined easily, then given a single low-temperature aging treatment – usually H950 for maximum strength or H1000 for the best balance of strength, toughness and SCC resistance.
Custom 465® is a registered trademark of CRS Holdings, Inc., a subsidiary of Carpenter Technology Corporation.
Key Properties of Custom 465
- Ultra-high strength: about 1,765 MPa (256 ksi) tensile in H950 – among the strongest stainless steels available.
- Toughness: notch tensile ratio of about 1.4–1.5 and good Charpy values, so it resists brittle fracture at high strength.
- Corrosion and SCC resistance: general corrosion resistance close to 17-4PH, with better stress-corrosion cracking resistance than other ultra-high-strength steels.
- Easy heat treatment: machine in Condition A, then age once at 510–538 °C – minimal distortion and no quench after aging.
- Magnetic: as a martensitic steel, Custom 465 is magnetic in all conditions.
Applications of Custom 465 Bars
- Aerospace: landing-gear components, actuators, flap and slat tracks, structural fittings, shafts and high-strength fasteners.
- Medical: surgical instruments to ASTM F899 – orthopaedic and spinal drivers, distractors and dental tools.
- Oil & gas: downhole tools, valve stems and high-strength shafts.
- Defence & other: firearm components, high-performance tooling and sports equipment.
Why Buy Custom 465 Bars from ASC LLP?
- Certified material: AMS 5936 / ASTM A564 bar with EN 10204 3.1 certificates and full heat traceability.
- All forms and sizes: round, hex, flat, square, forged bar and billet, wire, sheet and plate.
- Cut to length: small quantities and cut pieces for prototypes and short production runs.
- Testing: PMI, hardness and third-party inspection on request.
- Export packing: regular shipments to the USA, Europe, the Middle East and Asia.
Custom 465 Bar Forms & Size Range
| Form | Size range | Length | Finish / tolerance |
| Custom 465 round bar | 1/4″ to 16″ (6 – 400 mm) dia. | Random or cut lengths | Bright, peeled, turned or centreless ground; h9 / h11 |
| Hex bar | 10 – 100 mm A/F | Random or cut lengths | Cold drawn / bright |
| Flat bar | 10 – 200 mm wide | Up to 6 m | Hot rolled or machined |
| Square bar | 10 – 150 mm | Up to 6 m | Hot rolled or machined |
| Forged bar & billet | Larger sizes on request | As required | Rough turned / machined |
| Wire, sheet & plate | On request | As required | As per ASTM A693 / AMS |
Tolerances as per AMS 2241 / ASTM A484 unless agreed otherwise. Other sizes, cut pieces and special tolerances on request.
Custom 465 Mechanical Properties – H950 vs H1000
| Property (typical, longitudinal) | H950 | H1000 |
| Tensile strength | ≈ 1,765 MPa (256 ksi) | ≈ 1,595 MPa (231 ksi) |
| 0.2% yield strength | ≈ 1,655 MPa (240 ksi) | ≈ 1,495 MPa (217 ksi) |
| Elongation (4D) | ≈ 12% | ≈ 14% |
| Reduction of area | ≈ 57% | ≈ 63% |
| Notch tensile ratio | ≈ 1.40 | ≈ 1.52 |
| Hardness | ≈ 49.5 HRC | ≈ 47.5 HRC |
| Best for | Maximum strength | Strength + toughness + SCC resistance |
Typical values for 3″–9″ round bar. Guaranteed minimums depend on the specification (AMS 5936 / ASTM A564) and bar size and are shown on the mill certificate.
Custom 465 Specifications
| Standard | Designation | Covers |
| UNS | S46500 | Unified Numbering System |
| AMS | AMS 5936 | Bars, wire and forgings – aerospace |
| ASTM | A564 (UNS S46500) | Hot-finished and cold-finished age-hardening stainless bars |
| ASTM | F899 | Stainless steels for surgical instruments |
| ASTM | A693 | Plate, sheet and strip |
| Design data | MMPDS | Aerospace design allowables |
| Test certificate | EN 10204 3.1 | Third-party inspection on request |
Custom 465 Heat Treatment (H950 & H1000)
| Step | Process | Purpose |
| 1. Solution treat (Condition A) | About 982 °C (1,800 °F), then cool rapidly | Softest condition – bar is normally supplied and machined like this |
| 2. Refrigerate | About −73 °C (−100 °F) for 8 hours, then warm to room temperature | Completes transformation to martensite before aging |
| 3a. Age to H950 | 510 °C (950 °F) for 4 hours, air cool | Maximum strength (≈ 49.5 HRC) |
| 3b. Age to H1000 | 538 °C (1,000 °F) for 4 hours, air cool | Higher toughness and SCC resistance (≈ 47.5 HRC) |
Always follow the heat-treatment requirements of the applicable specification (AMS 2759/3 or the customer drawing). Allow for a small dimensional change on aging when finish-machining before heat treatment.
Custom 465 Chemical Composition (UNS S46500)
| Element | Composition (wt %) |
| Chromium (Cr) | 11.00 – 12.50 |
| Nickel (Ni) | 10.75 – 11.25 |
| Molybdenum (Mo) | 0.75 – 1.25 |
| Titanium (Ti) | 1.50 – 1.80 |
| Carbon (C) | 0.02 max |
| Manganese (Mn) | 0.25 max |
| Silicon (Si) | 0.25 max |
| Phosphorus (P) | 0.015 max |
| Sulphur (S) | 0.010 max |
| Iron (Fe) | Balance |
Custom 465 Physical Properties
| Property | Value (approx.) |
| Density | 7.81 g/cm³ (Condition A) · 7.83 (H950) · 7.84 (H1000) |
| Modulus of elasticity | ≈ 200 GPa (29 × 10⁶ psi) |
| Magnetic | Yes – magnetic in all conditions |
| Microstructure | Martensitic, precipitation hardening |
Custom 465 vs 17-4PH vs 15-5PH vs 13-8Mo
| Grade | Typical peak tensile strength | Main advantage |
| Custom 465 (H950) | ≈ 1,765 MPa (256 ksi) | Highest strength with good toughness and SCC resistance |
| PH 13-8Mo (H950) | ≈ 1,550 MPa (225 ksi) | Very good transverse toughness |
| {a(“/17-4ph-round-bars/”,”17-4PH”)} / 15-5PH (H900) | ≈ 1,380 MPa (200 ksi) | Lower cost, widely available |
Engineers often move from 17-4PH or 13-8Mo to Custom 465 when they need a smaller, lighter part at the same load, or better stress-corrosion cracking resistance than low-alloy steels such as 4340 or 300M. For even higher strength in a non-stainless alloy, see MP35N; for hot sections, see Inconel 718 and A286.
Get a Quote for Custom 465 Bars
Send your grade, specification (AMS 5936 / ASTM A564 / F899), condition, size and quantity to sales@amardeepsteel.com or call 022-67439130. See also our full range of stainless steel bars and rods and our article on Custom 465 in aerospace components.
Frequently Asked Questions – Custom 465
What is Custom 465?
Custom 465 (UNS S46500) is a martensitic, precipitation-hardening stainless steel with about 11.5% Cr, 11% Ni, 1% Mo and 1.6% Ti. After aging it reaches about 1,600–1,770 MPa tensile strength with good toughness and stress-corrosion cracking resistance.
What is the difference between Custom 465 H950 and H1000?
H950 is aged at 510 °C (950 °F) for maximum strength – about 1,765 MPa tensile and 49.5 HRC. H1000 is aged at 538 °C (1,000 °F) – slightly lower strength (about 1,595 MPa, 47.5 HRC) but better toughness and SCC resistance.
Which specification covers Custom 465 bar?
Custom 465 bar is supplied to AMS 5936 for aerospace, ASTM A564 (UNS S46500) for general use and ASTM F899 for surgical instruments. Plate, sheet and strip are covered by ASTM A693.
Is Custom 465 stronger than 17-4PH?
Yes. Custom 465 in H950 reaches about 1,765 MPa tensile strength, compared with about 1,380 MPa for 17-4PH in H900, while also offering better toughness and SCC resistance at that strength.
Is Custom 465 magnetic?
Yes. Custom 465 is a martensitic stainless steel and is magnetic in all conditions.
Can Custom 465 be machined?
Yes. It is normally machined in the solution-treated Condition A, then aged to H950 or H1000. Allow for a small dimensional change during aging.
Global Reach
ASC LLP supplies Custom 465 and other high-strength alloys to aerospace, medical, defence and oil & gas customers worldwide, with prompt delivery and full documentation. Buyers in the USA, Europe, the Middle East and Asia rely on our Custom 465 bars for certified properties and traceability.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
