AMS 5568 specification covers a corrosion- and heat-resistant steel (17-7PH / UNS S17700) in the form of welded tubing. 17-7PH is a precipitation-hardening stainless steel that provides high strength and hardness, excellent fatigue properties, good corrosion resistance, good formability, and minimum distortion upon heat treatment. This alloy offers valuable property combinations particularly well suited for aerospace applications. It also provides benefits for other applications requiring high strength and good corrosion resistance, as well as excellent properties for flat springs at temperatures up to 315°C (600°F) .
Product Forms & Availability – 17-7PH (UNS S17700 / AISI 631)Welded Tubing (AMS 5568)| Parameter | Range |
|---|
| Outside Diameter | Custom – as required | | Wall Thickness | Custom – as required | | Condition | Condition A – solution heat treated | | Form | Welded tubing |
Additional 17-7PH Product Forms| Product Form | Specification | Availability |
|---|
| Sheet | AMS 5528 | Available | | Strip | AMS 5528 / AMS 5529 | Available | | Plate | AMS 5528 | Available | | Bars | AMS 5644 / ASTM A564 | Available | | Forgings | AMS 5644 | Available | | Wire | AMS 5678 | Available | | Welding Wire | AMS 5824 | Available | | Foil (Shim) | Various thicknesses | Available |
View Foil Stock List, Sheet/Plate Stock List or contact Sales for further availability.
Specifications – 17-7PH | Specification | Product Form | Description |
|---|
| AMS 5568 | Welded tubing | Corrosion resistant, precipitation hardening | | AMS 5528 | Sheet, strip, plate | Solution heat treated | | AMS 5529 | Sheet, strip | Cold rolled | | AMS 5644 | Bars and forgings | Per ASTM A564 Type 631 | | AMS 5678 | Wire | 17-7PH wire | | AMS 5824 | Welding wire | Filler metal | | MIL-S-25043 Cond. C | Sheet, strip, plate | Military specification | | ASTM A693 | Plate, sheet, strip | Standard | | ASTM A313 | Wire | Spring wire | | ASTM A564 | Bar | Standard | | ASTM A579 | Forgings | Standard | | ASTM A705 | Forgings | Standard | | ASME SA564 | Bar | Boiler code | | ASME SA693 | Plate, sheet, strip | Boiler code | | ASME SA705 | Forgings | Boiler code | | UNS S17700 | – | Unified numbering system | | AISI 631 | – | AISI designation |
Operating Conditions & Selection Criteria17-7PH welded tubing is specified when designers require a precipitation-hardening stainless steel with high strength, excellent fatigue properties, good corrosion resistance, and minimum distortion upon heat treatment for aerospace applications. Service Temperature Range: Suitable for flat spring applications up to 315°C (600°F); retains useful properties at elevated temperatures Strengthening Mechanism: Precipitation-hardened through aluminum additions (0.75-1.50%) forming Ni₃Al intermetallic compounds Minimum Distortion: Heat treatment process results in minimal dimensional change — critical for precision tubing applications Fatigue Properties: Excellent fatigue properties for cyclic loaded components Corrosion Resistance: Good corrosion resistance comparable to 304 stainless steel Formability: Good formability in solution heat-treated condition (Condition A) Weldability: Good weldability using GTAW (TIG) and resistance welding methods Multiple Heat Treatments: Variety of heat treatment options (TH1050, RH950) to achieve different property combinations
ApplicationsAerospace: Hydraulic lines, fuel lines, instrumentation tubing, structural components, aircraft skins Springs: Flat springs, leaf springs, spring washers, retaining rings (up to 315°C / 600°F) Chemical Processing: Corrosion-resistant tubing for moderate environments Instrumentation: Precision tubing for sensing and control systems Heat Exchangers: Tubing for moderate temperature service
Request a quote for AMS 5568 / 17-7PH Welded Tubing (UNS S17700 / AISI 631) – 17Cr – 7Ni – 1Al – Precipitation Hardening . Please provide: Outside diameter (OD) and wall thickness required Length required Heat treatment condition (Cond A / TH1050 / RH950 / CH900, etc.) Quantity (kg, meters, or pieces) Destination port Any special certification requirements
📧 Email: daisy@zytcsteel.com
📱 WhatsApp / WeChat: +86 17335753350 |
