ZYTC Alloy is an ISO 9001 and AS 9120B certified superalloy manufacturer and supplier, offering 1.4568 / 17-7PH stainless steel at factory-direct prices with full material traceability and fast global delivery. 1.4568 (17-7PH / UNS S17700 / AISI 631) is a semi-austenitic precipitation-hardening stainless steel that combines high strength and hardness with excellent fatigue properties, good corrosion resistance, good formability, and minimum distortion upon heat treatment . It is easily formed in the annealed condition (Condition A) and then hardened to high strength levels by simple heat treatments to Conditions CH900, RH950, or TH1050.
Product Forms & Availability – 1.4568 / 17-7PH (UNS S17700 / AISI 631)| Product Form | Availability |
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| Strips | Available | | Wires | Available | | Sheets | Available | | Bars | Available | | Foil (Shim) | Available (various thicknesses) |
Bar & Sheet Forms| Product Form | Size Range | Condition |
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| Round Bar | Φ3mm – 500mm | Condition A (solution annealed) | | Flat Bar | Custom sizes | Condition A | | Sheet | 0.010″ – 0.187″ | Condition A | | Strip | 0.005″ – 0.187″ | Condition A | | Wire | Various gauges | Condition A |
For all stock availability, contact Sales.
Specifications – 1.4568 / 17-7PH| Specification | Product Form | Description |
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| DIN 1.4568 | – | German standard | | X7CrNiAl17-7 | – | EN designation | | UNS S17700 | – | Unified numbering system | | AISI 631 | – | AISI designation | | AMS 5528 | Sheet, strip, plate | Solution heat treated | | AMS 5529 | Sheet, strip | Cold rolled | | AMS 5644 | Bars and forgings | Standard | | AMS 5568 | Welded tubing | Standard | | ASTM A693 | Plate, sheet, strip | Standard |
Physical Data| Chemical Composition (Weight %) | 17-7PH Specification |
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| Chromium (Cr) | 16.0 - 18.0 | | Nickel (Ni) | 6.5 - 7.75 | | Aluminum (Al) | 0.75 - 1.50 | | Carbon (C) | 0.09 max. | | Manganese (Mn) | 1.00 max. | | Silicon (Si) | 1.00 max. | | Iron (Fe) | Balance |
| Physical Properties | Metric | Imperial |
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| Density | 7.80 - 7.81 g/cm³ | 0.282 lb/in³ | | Modulus of Elasticity | 200 GPa | 29.5 × 10³ ksi | | Melting Range | 1400 - 1450°C | 2550 - 2640°F |
| Mechanical Properties by Condition | Tensile Strength | Yield Strength | Elongation | Hardness |
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| Condition A (Annealed) | 150 ksi max (1034 MPa) | 65 ksi (448 MPa) | 20% | 92 HRB max | | TH1050 | 170 ksi (1170 MPa) | 150 ksi (1035 MPa) | 4-6% | 38-46 HRC | | RH950 | 210 ksi (1450 MPa) | 190 ksi (1310 MPa) | 4-6% | 46 HRC | | Condition C (Cold Rolled) | 200 ksi min (1380 MPa) | 175 ksi min (1207 MPa) | 1% | 41 HRC min | | CH900 | 240 ksi min (1650 MPa) | 230 ksi min (1585 MPa) | 1% | 46 HRC min |
Heat Treatment Conditions| Condition | Treatment | Description |
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| Condition A | 1900-2050°F (1038-1121°C), rapid cool | Soft, formable condition; austenitic structure | | TH1050 | Condition A + 1050°F (566°C) × 1.5h, air cool | High strength with good ductility | | RH950 | Condition A + -100°F (-73°C) × 8h + 950°F (510°C) × 1h, air cool | Maximum strength | | Condition C | Cold rolled (60-70% reduction) | Work-hardened; martensitic structure | | CH900 | Condition C + 900°F (482°C) × 1h, air cool | Highest strength (240 ksi min) |
ApplicationsAerospace: Aircraft components, honeycomb structures, bulkheads, structural panels, fasteners Springs: Flat springs, spring washers (Belleville, Grower), wave springs Valve Parts: Diaphragms, tanks, fittings Industrial: Heat exchangers, machine construction components, food knives
Factory Price – 1.4568 / 17-7PH Round Bar (UNS S17700 / AISI 631)Indicative factory pricing (FOB China): | Diameter Range | Product Form | Condition | Price (USD/kg) |
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| 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 – 250mm | Round Bar | Condition A | $6 – $14 | | Φ250mm – 500mm | Round Bar | Condition A | $5 – $13 |
Heat Treated Conditions (CH900 / RH950 / TH1050): Add $2 – $5/kg. Volume discounts available for orders above 500 kg. Custom sizes and specifications available – contact us for a firm quote.
Delivery Lead Times (after pre-payment confirmation)| Stock Status | Delivery Time |
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| Products in stock | Within 3 days | | Raw material in stock | Within 10 days | | Re-melting required | 15 – 25 days |
Contact ZYTC Alloy TodayRequest a quote for 1.4568 / 17-7PH Stainless Steel (UNS S17700 / AISI 631) – Austenitic Cr-Ni + Al – Excellent Fatigue & High Strength – Up to 480°C . Please provide: Diameter / size Product form (bar / sheet / strip / wire) Heat treatment condition (A / CH900 / RH950 / TH1050) Length or weight required Quantity Destination port Any special certification requirements
📧 Email: daisy@zytcsteel.com
📱 WhatsApp / WeChat: +86 17335753350 |
