Custom 450 / Custom 455 / Custom 465 Round Bars
Custom 450, Custom 455 and Custom 465 are martensitic, age-hardenable stainless steels that are supplied in the soft solution annealed condition and reach very high strength after a single, low temperature ageing treatment. Custom 450 offers corrosion resistance close to 304 with strength above 17-4PH; Custom 455 reaches around 1600 MPa; and Custom 465, a double vacuum melted grade, exceeds 1700 MPa with excellent fracture toughness and stress corrosion resistance.
Nexforge Alloys supplies Custom 450, 455 and 465 round bars in the annealed (Condition A) or aged condition to AMS 5763, AMS 5617 and AMS 5936 respectively. Bars are ground to close tolerances for precision machining and are supported by chemical, mechanical and hardness certification.
Custom 450 (UNS S45000), Custom 455 (UNS S45500) and Custom 465 (UNS S46500) round bars from 6 mm to 200 mm diameter, as per AMS 5763 / 5617 / 5936 and ASTM A564.
Custom 450 / 455 / 465 Round Bar Specification
| Parameter | Details |
|---|---|
| Grades | Custom 450 (UNS S45000), Custom 455 (UNS S45500), Custom 465 (UNS S46500) |
| Standards | AMS 5763, AMS 5617, AMS 5936, ASTM A564 / A705 (S45000, S45500), ASME SA564 |
| Size Range | 6 mm to 200 mm diameter |
| Length | Random 3 to 4 metres, or cut to length |
| Condition | Solution annealed (Condition A) or precipitation hardened H900 / H950 / H1000 / H1050 / H1150 |
| Surface Finish | Centreless ground, peeled, polished |
| Tolerance | h9 / h10 or as per drawing |
| Testing | Chemical, tensile, hardness, macro-etch, UT (AMS 2154) on request |
| Certification | EN 10204 3.1 mill test certificate |
Chemical Composition (% by weight)
| Grade (UNS) | C | Mn | Si | P | S | Cr | Ni | Mo | Cu | Ti | Nb | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Custom 450 (S45000) | 0.05 max | 1.00 max | 1.00 max | 0.030 max | 0.030 max | 14.0 - 16.0 | 5.0 - 7.0 | 0.50 - 1.00 | 1.25 - 1.75 | - | 8 x C min | Balance |
| Custom 455 (S45500) | 0.05 max | 0.50 max | 0.50 max | 0.040 max | 0.030 max | 11.0 - 12.5 | 7.5 - 9.5 | 0.50 max | 1.50 - 2.50 | 0.80 - 1.40 | 0.10 - 0.50 | Balance |
| Custom 465 (S46500) | 0.02 max | 0.25 max | 0.25 max | 0.015 max | 0.010 max | 11.0 - 12.5 | 10.75 - 11.25 | 0.75 - 1.25 | - | 1.50 - 1.80 | - | Balance |
Mechanical Properties
| Grade | Condition | Tensile Strength (typ. min) | 0.2% Yield Strength (typ. min) | Elongation (min) | Hardness (typ.) | Density |
|---|---|---|---|---|---|---|
| Custom 450 | H900 (aged 482 °C) | 1240 MPa (180 ksi) | 1170 MPa (170 ksi) | 10 % | 39 - 42 HRC | 7.75 g/cm³ |
| Custom 455 | H900 (aged 482 °C) | 1620 MPa (235 ksi) | 1520 MPa (220 ksi) | 8 % | 47 - 49 HRC | 7.76 g/cm³ |
| Custom 465 | H900 (aged 482 °C) | 1725 MPa (250 ksi) | 1585 MPa (230 ksi) | 10 % | 49 - 51 HRC | 7.80 g/cm³ |
Values are minimum or typical figures as per the referenced standards and are for guidance only. Please refer to the mill test certificate supplied with the material for actual values.
Key Features
- Machinable in the annealed condition, then aged with minimal distortion
- Very high strength combined with good corrosion resistance
- Custom 465 provides excellent fracture toughness and resistance to stress corrosion cracking
- Single-step, low temperature age hardening
Applications
- Aerospace fasteners, actuators, landing gear and flap track components
- High strength shafts, gears and pump parts
- Surgical and dental instruments, orthopaedic tools
- Firearm and defence components
- Oil and gas tools requiring high strength and corrosion resistance