Custom 465®

Custom 465® Stainless Steel (Carpenter Steel product) is a double vacuum-melted martensitic alloy that has a good combination of strength and resistance to corrosion. The grade was first developed for the aerospace industry but the material is now also used in the medical, industrial and energy sectors.

Common Applications

Due to the material’s high strength and corrosion resistance Custom 465® is used in a wide range of applications including airplane structural parts in addition to a range of medical applications. See below for a few examples:

  • Surgical instruments (orthopedic, spinal and dental)
  • Aerospace structural parts
  • Oil & gas production equipment
  • Drill bits
  • Drivers
  • Shafts
  • Sporting equipment

Medical Applications Details

Because of the material’s high strength and strong corrosion resistance with an ASTM F899 specification, the grade is used in a wide range of surgical instruments. However, in contrast to other grades, Custom 465® is not an implantable metal. Instead, it is primarily used for various surgical instruments including but not limited to surgical scissors, ear pins, rollers and guides.

Material Characteristics 

Custom 465® is more expensive than other steel alloys including 15-5PH, 13-8 and 300M. It is still widely used because it does not require cadmium, nickel or chrome plating to improve corrosion resistance. As a result, the material is much more resistant to cracking.

Additionally, because the material does not require coatings to protect against corrosion, applications using the grade do not need to be inspected as frequently. This valuable benefit reduces both maintenance costs and equipment down time.

Standard heat treatment for the grade is generally done on solution annealed material. Standard conditions include H900, H950, H1000, H1050, H1100 and H1150.

As a premium melted, age-hardenable steel Custom 465® is capable of ultimate tensile strength of over 1700 MPa (250ksi) in the H900 condition. In condition H1100 the material has superior strength and corrosion resistance to other products such as Custom 455.

General corrosion resistance for the grade is comparable to 304. In both the H950 and H1000 condition, the material did not rust after 2000 hours of exposure to 5% neutral salt spray.

Additional Information:

Martensitic Stainless Steel (Custom 465® PH Classification)

Stainless steels fall into four main categories: martensitic, austenitic, ferritic, and duplex. Martensitic stainless steels are defined by material that can be tempered and hardened by aging or heat treatment.

Martensitic material can be sub-divided into two categories:

1) High carbon material (above 0.4% carbon) used mainly for wear resistance (surgical instruments, molds, etc.)

2) Low carbon material (below 0.4% carbon) used mostly for their mechanical properties (shafts, valves, etc.)

Relative to other martensitic material, Customer 465® has a low carbon content (<0.05%).


Custom 465® Summary Information

Specs Markets Applications Forms
ASTM F899 Medical, Aerospace, Industrial Surgical Scissors, Aerospace Structural Parts, Oil & Gas Equipment, Drill Bits, Drivers, Shafts Bar



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