Alloy 17-7 PH Composition

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Stainless Steel 17-7

Related Metals:-
  • 17-7 PH(tm)
  • AL 17-7(tm)
  • Specifications : 9RU10(tm)
    • AISI 631
    • AMS 5528
    • AMS 5529
    • AMS 5568
    • AMS 5644
    • AMS 5678
    • ASTM A313 (631)
    • ASTM A564 (631)
    • ASTM A579 (631)
    • ASTM A693 (631)
    • ASTM A705 (631)
    • DIN 1.4568
    • MIL S-25043
    • UNS S17700
    Chemistry Data
    • Aluminum:- 0.75 - 1.5
    • Carbon:- 0.09 max
    • Chromium:- 14 - 16
    • Iron:- Balance
    • Manganese:- 1 max
    • Nickel:- 6.5 - 7.75
    • Phosphorus:- 0.04 max
    • Silicon:- 1 max
    • Sulphur:- 0.04 max
    General Information
    Principal Design Features
    A precipitation hardenable chromium-nickel-aluminum stainless steel combining high strength, moderate corrosion resistance and properties well suited for flat springs.


    Applications Used for applications requiring good strength, corrosion resistance and mechanical properties up to 800 F in service. It is often used for very detailed, intricate parts due to its low distortion in heat treatment. Very stable. Commonly found in a variety
    MachinabilityRated at 75 % of B1112. This alloy displays long gummy chips that require chip breakers to overcome. Slow speeds and constant feeds are recommended for best results.
    Corrosion Resistance
    Not suitable for use in marine applications. Resistant to a wide variety of dilute acids, fresh water and atmosphere. Superior to standard heat treatable chromium stainless steels, it approaches 301 and 302 stainless corrosion resistance. Resistant to liqWeldingMost common arc and resistance methods have been successfully employed with 17-7 PH. It is recommended that inert gas shielding be employed during fusion welding to reduce the oxidation of aluminum during the process. Pre-heating and post-weld annealing a
    Heat Treatment
    CONDITION C - Results from heavy cold working (generally 45-50% reduction) of solution treated material. CONDITION CH900- Heat Condition C material to 900 F(482 C), hold for 1 hour, air cool. CONDITION A1750- After fabrication, heat solution treated mater
    Cold Working
    In Condition A, this material can be easily formed using most common procedures.


    Annealing 1950 F (1066 C) for 3 minutes for each .1 inch (2.5 mm) of thickness, air cool.
    AgingSolution anneal at 2150 F for 4 hours and air cool. Follow with 1975 F for 4 hours and air cool, then 1550 F for 24 hours, air cool and 1400 F for 16 hours, air cool to complete precipitation hardening process. Resistant to liquid oxygen and hydrogen an
    • Density (lb / cu. in.):- 0.282
    • Specific Gravity:- 7.81
    • Specific Heat (Btu/lb/Deg F - [32-212 Deg F]):- 0.11

    Mechanical Data
    • Form : Sheet
    • Condition : A 1750
    • Temper : 70
    • Tensile Strength : 132
    • Yield Strength : 40
    • Elongation : 20
    • Rockwell : B85
    • Form : Sheet
    • Condition : A Annealed
    • Temper : 70
    • Tensile Strength : 130
    • Yield Strength : 45
    • Elongation : 20
    • Rockwell : B85
    • Form : Sheet
    • Condition : C
    • Temper : 70
    • Tensile Strength : 219
    • Yield Strength : 191
    • Elongation : 5
    • Rockwell : c43
    • Form : Sheet
    • Condition :CH 900
    • Temper : 70
    • Tensile Strength : 265
    • Yield Strength : 259
    • Elongation : 3
    • Rockwell : C49
    • Form : Sheet
    • Condition :R 100
    • Temper : 70
    • Tensile Strength : 174
    • Yield Strength : 115
    • Elongation : 10
    • Rockwell : C37
    • Form : Sheet
    • Condition : RH 950
    • Temper : 70
    • Tensile Strength : 220
    • Yield Strength : 200
    • Elongation : 9
    • Rockwell : C46
    ]
    • Form : Sheet
    • Condition : T
    • Temper : 70
    • Tensile Strength : 145
    • Yield Strength : 99
    • Elongation : 10
    • Rockwell : C31
    • Form : Sheet
    • Condition : TH 1050
    • Temper : 70
    • Tensile Strength : 190
    • Yield Strength : 160
    • Elongation : 10
    • Rockwell : C42


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