AMS 5629 specification covers a premium aircraft-quality, corrosion-resistant steel (13-8PH / UNS S13800) in the form of bars, wire, forgings, flash-welded rings, and extrusions up to 12 inches (305 mm) in nominal diameter in the solution heat-treated condition, and stock of any size for forging, flash-welded rings, or extrusions. 13-8PH (UNS S13800) is a precipitation-hardening steel alloy with high strength and toughness and good corrosion resistance. Even in larger sections, the alloy consistently offers superior ductility and transverse toughness. The alloy's chemical composition combined with a controlled melting practice ensures that the material's microstructure is typically ferrite-free. In production, the alloy is double melted in a vacuum induction furnace (VIM) followed by consumable electrode vacuum melt (CEVM / VAR) . A single precipitation-hardening heat treatment creates the performance characteristics of the alloy. 13-8PH offers suitability in applications where good ductility, corrosion resistance, stress-corrosion resistance, and high strength are predetermined requirements. ZYTC Alloy is an ISO 9001 and AS 9120B certified superalloy manufacturer and supplier, offering AMS 5629 13-8PH stainless steel bar at factory-direct prices with full material traceability and fast global delivery. If you don't see your desired alloy on our catalog, don't worry. Tell us what you need – we offer custom solutions.
Size Availability – AMS 5629| Product Form | Size Limit |
|---|
| Bars, Wire, Forgings, Rings, Extrusions | ≤ 12 inches (305 mm) | | Forging Stock | Any size | | Ring Stock | Any size | | Extrusion Stock | Any size |
Product Forms & Availability – 13-8PH (UNS S13800)Bar & Related Forms (AMS 5629 – Condition A)| Product Form | Size Range | Condition |
|---|
| Round Bar | Φ3mm – 12″ (305 mm) | Solution heat treated | | Square Bar | Up to 12″ | Solution heat treated | | Flat Bar | Up to 12″ thickness | Solution heat treated | | Hex Bar | Up to 12″ across flats | Solution heat treated | | Wire | Various gauges | Solution heat treated | | Forgings | Up to 12″ | Solution heat treated | | Flash-Welded Rings | Up to 12″ | Solution heat treated | | Extrusions | Up to 12″ | Solution heat treated | | Forging Stock | Any size | Solution heat treated |
Additional 13-8PH Product Forms| Product Form | Availability |
|---|
| Sheet | Available | | Plate | Available | | Strip | Available | | Welding Wire | Available |
For all stock availability, contact Sales.
Specifications – 13-8PH Stainless Steel| Specification | Product Form | Description |
|---|
| AMS 5629 | Bars, wire, forgings, rings, extrusions | Premium aircraft quality | | UNS S13800 | – | Unified numbering system | | ASTM A693 | Plate, sheet, strip | General standard | | ASTM A705 | Bar and forgings | Standard specification |
Operating Conditions & Selection Criteria13-8PH bar is specified when designers require a premium aircraft-quality precipitation-hardening stainless steel with high strength, superior ductility, excellent transverse toughness, and good corrosion resistance — even in larger cross-sections. Premium Aircraft-Quality: AMS 5629 specifies double melted (VIM + VAR) material with ferrite-free microstructure for critical applications Service Temperature Range: Excellent properties up to 315°C (600°F); good oxidation resistance to 650°C (1200°F) Strengthening Mechanism: Age-hardened through precipitation of aluminum-rich intermetallic phases during single-step aging Superior Toughness: Even in larger sections, offers consistent superior ductility and transverse toughness — better than 17-4PH and 15-5PH in thicker cross-sections Ferrite-Free Microstructure: Controlled melting ensures typically ferrite-free microstructure for reliable performance Corrosion Resistance: Good corrosion resistance comparable to 304 stainless; excellent stress-corrosion resistance Single-Step Aging: Simple low-temperature heat treatment — no complex processing required Double Melted: VIM + VAR for superior cleanliness and homogeneity
ApplicationsAircraft Structural Parts: Bulkheads, fuselage frames, wing components, engine mounts Landing Gear Components: High-strength structural parts, landing gear forgings Shafts: High-strength shafts for aerospace and industrial applications Valves: High-pressure valve components for petrochemical and aerospace Fittings & Fasteners: High-strength bolts, studs, nuts for critical assemblies Petrochemical Components: Sour gas service components, wellhead equipment Large Section Components: Applications requiring consistent properties in larger cross-sections
Factory Price – AMS 5629 13-8PH Stainless Steel Bar (UNS S13800)Indicative factory pricing (FOB China): | Diameter Range | Product Form | Condition | Price (USD/kg) |
|---|
| Φ3mm – 25mm | Round Bar | Condition A | $8 – $18 | | Φ25mm – 50mm | Round Bar | Condition A | $7 – $16 | | Φ50mm – 100mm | Round Bar | Condition A | $6 – $15 | | Φ100mm – 200mm | Round Bar | Condition A | $6 – $14 | | Φ200mm – 305mm (12″) | Round Bar | Condition A | $5 – $13 | | Flat / Square / Hex Bar | Up to 12″ | Condition A | $7 – $16 | | Wire | Various | Condition A | $10 – $20 | | Forging Stock | Any size | Condition A | $5 – $13 |
Heat Treated (Aged) Conditions: Add $2 – $5/kg for H950/H1000/H1025/H1050/H1100/H1150, etc. Volume discounts available for orders above 100 kg. Custom sizes, tolerances, and aged conditions available – contact us for a firm quote.
Delivery Lead Times (after pre-payment confirmation)| Stock Status | Delivery Time |
|---|
| Products in stock | Within 3 days | | Raw material in stock | Within 10 days | | Re-melting required | 15 – 25 days |
Contact UsRequest a quote for AMS 5629 / 13-8PH Stainless Steel Bar (UNS S13800) – Premium Aircraft Quality – Precipitation-Hardening – High Strength & Toughness – VIM + VAR Melted . Please provide: Diameter / size (round, square, flat, hex, wire) Length or weight required Product form (bar / wire / forging / ring / extrusion / stock) Heat treatment condition (Cond A / H950 / H1000 / H1025 / H1050 / H1100 / H1150, etc.) Tolerance requirement Destination port Any special certification requirements
📧 Email: daisy@zytcsteel.com
📱 WhatsApp / WeChat: +86 17335753350 |
