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S17700 17-7 PH AISI 631 Stainless Steel Round Bar Stock 260mm

Categories Stainless Steel Round Bar
Brand Name: MITTEL
Model Number: 631 17-7PH
Certification: ISO/NV/SGS
Place of Origin: Jiangsu,China
MOQ: 1ton
Price: USD2300-5000per ton
Payment Terms: L/C, T/T, Western Union
Delivery Time: within 10days after received the payment
Packaging Details: Standard seaworthy packaging / as per buyer’s request
Standard: ASTM, AISI, DIN, EN, GB, JIS
Dimensions: 3mm-500mm
Type: Round
Special Use: Valve Steels
Length: Customers' Requirements
Surface: Pickled Bright Polished Satin
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S17700 17-7 PH AISI 631 Stainless Steel Round Bar Stock 260mm

Stainless Steel PH 17-7 Material Round Bar Ø260 ASTM S17700 AISI631,SAE17-7PH Forge Rod


17-7 PH is a chromium-nickel-aluminum precipitation hardening stainless steel that provides high strength and hardness and a moderate level of corrosion resistance up to 600˚F. This grade can be easily formed in the austenitic condition similar to Type 301 stainless steel and hardened to high strength levels using relatively low heat treatments that minimize distortion. The corrosion resistance of 17-7 PH is comparable to that of Type 304 stainless steel, especially in the CH 900 temper, and it has been used for spring applications, washers, eyelets, fittings and fasteners.

Heat treatments can strengthen this type of stainless steel. The typical process for 17-7 PH heat treatment has three or four steps:

  • Conditioning using austenite.
  • Cooling, which turns the austenite into martensite.
  • Precipitation hardening until Condition TH 1050 or RH 950 has been reached.
  • To achieve the highest mechanical properties Condition A material is transformed to martensite at the mill by cold reduction to Condition C. After fabrication by the user, a single low-temperature heat treatment is preformed to achieve condition CH 900.
Chemical Composition
ElementContent(%)
Chromium, Cr16-18
Nickel, Ni6.50 – 7.75
Manganese, Mn1 max
Silicon, Si1 max
Aluminum, Al0.75 – 1.50
Carbon, C0.09 max
Phosphorous, P0.040 max
Sulfur, S0.030 max
Iron, Febalance
Physical Properties
PropertiesMetricImperial
Density7.80 g/cm30.282 lb/in3
Melting Range1404-1440°C2560-2625°F
Mechanical Properties
PropertiesMetricImperial
Tensile Strength1170 MPa170000 psi
Yield Strength965 MPa14000 psi
Modulus of Elasticity204 GPa29600 ksi
Poisson’s Ratio0.27-0.300.27-0.30
Elongation at Break6%6%
Hardness, Rockwell C3838


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