Stainless Steel 17-4PH

304/304L Stainless Steel

UNS S17400 (Grade 630)

We are a leading Manufacturer & Exporter of 17-4ph Stainless Steel such as 17-4ph Round Bar, 17-4ph Flat Bar and 17-4Ph Circle from India.

17-4ph Stainless Steel Round Bar :

Dimensions Dia. 8mm~400mm
Grade 600 Series
Model Number 17-4PH
Type Round
Application Propellar shaft of ship, pump shaft, valve parts
Shape Round
Certification BV
Special Use Valve Steels

17-4ph Stainless Steel Round Bar :

  • Dia.: 8mm~400mm
  • Finishing: solution-annealed + age hardening
  • 3ondition: H1150

Tolerance: H9, H11, +/-1MM as per customers' requirement.

Length: in fixed length or unfixed, generally within 7 meters.


  • Solution treatment, we call "Condition A"
  • Age hardening heat treatment (Condition: H900/ H925/ H1025/ H1075/ H1100/ H1150)

Surface: Black or Bright (Peeled, smooth turning surface, center-less grinding, polished)

Usage: Used as the propeller shaft of ship, pump shaft, valve parts, aircraft fittings, nuclear reactor components, gears, paper mill equipment, missile fittings and jet engine parts.

17-4ph Circle

The great benefit of this 17-4ph Circle is that they are generally supplied in the solution treated condition, in which they are just machinable, and then can be age hardened to achieve quite high strengths. This aging treatment is so low in temperature that there is no significant distortion. These grades are therefore well suited to production of long shafts, which require no re-straightening after heat treatment.

This grade has good oxidation resistance, but to avoid reduction of its mechanical properties and hardness it should not be used above its age hardening temperature. Prolonged exposure in the range 370-480°C should be avoided if ambient temperature toughness is critical.


  • 17-4ph Circle
  • 17-4ph Rings