Based on the stainless 17-4PH chemistry used in applications like aviation and motorsport, Reynolds offer a range of tubes and matched additive (3D printed) components for cycle frame use as well as other engineering projects.

Key product features:

  • Butted main triangle tubing at 38.1, 34.9, 31.7 ,28.6, 25,4mm diameters in various butt profiles
  • Rear stays available in the range 24.00 -16mm OD, shaped where required
  • Matched additive (3D printed) parts suitable for both brazed and TIG construction
  • Normally supplied pre-aged, ready for fabrication/welding
  • Chemistry and heat-treatment totally compatible with Reynolds 953 alloy and existing parts/fittings including weld wire
  • Corrosion resistance similar to type 300 Series Stainless steel
  • Plain gauge tubing options for custom projects

Why it works:

UTS: 1200-1350 MPa, density 7.8 gm/cc

931 has a 17% Chromium, 4% Nickel and Copper content, and is designated a stainless steel. When cold-worked and then aged/welded, this alloy cools to form a fine-grained, tough martensitic structure (“precipitate”) which offers builders ductile but strong fabrications.

At around 1300MPa tensile strength depending on heat-treatment, this steel is strong enough to be cold-drawn to tube walls around 0.4mm thick, offering light, competitive frame weights for durable frames with the RIDE OF STEEL.

Learn More

Click here to download a metal alloys comparison (extract) PDF for designers.