Custom 630 (17-4 PH) Project 70®+

UNS #S17400

Custom 630 (17Cr-4Ni) Project 70®+ is an improved-machining version of the convention martensitic precipitation/age-hardening stainless alloy offering high strength and hardness along with excellent corrosion resistance. Up to 15% and higher machining speeds with improved finishes and longer tool life can be obtained and the alloy can be age hardened by a single-step, low temperature treatment.

Type Analysis

  • Carbon (Maximum) 0.07
  • Phosphorus (Maximum) 0.04
  • Silicon (Maximum) 1
  • Nickel (Nominal) 3.00-5.00
  • Manganese (Maximum) 1
  • Sulfur (Maximum) 0.03
  • Chromium (Nominal) 15.00-17.50
  • Iron (Nominal) Balance
  • Copper (Nominal) 3.00-5.00
  • Columbium + Tantalum0.15-0.45

Applications

valve parts, chemical process equipment, aircraft fittings, fasteners, pump shafts, gears, paper mill equipment, missile fittings, and jet engine parts.

Applicable Specifications

  • AMS 5643
  • ASTM A564
  • ASME SA564
  • ASTM F899

Flats

Hexagons

Rounds

Square

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