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Hot Rolled 17-7PH Stainless Steel Round Bar Diameter 10 - 350mm SA276 Custom Cutting in Length
Product Details
| Products Name | 17-7PH Stainless Steel Bar | Diameter | 10 - 350mm |
|---|---|---|---|
| Length | 6m Or Cutting Any Length As Request | Surface | Black Or Polishing |
| Service | Cutting | Standard | ASTM DIN GB EN |
| Other Products | Round Bar, Square Bar, Flat Bar.etc | Technique | Hot Rolled |
| Highlight | Hot Rolled 17-7PH Stainless Steel Bar,Custom Cut Stainless Steel Round Bar,SA276 Stainless Steel Bar with Warranty |
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Product Description
Hot Rolled 17-7PH Stainless Steel Round Bar Diameter 10 - 350mm SA276 Custom Cutting in Length
Products Specification
| Products Name | 17-7PH Stainless Steel Round Bar |
| Grade |
303,303Cu,304,304L,309S,310S,310H,316L,316Ti,316H,317L,321,329,347,410,415,420, 430F,431,440A/B/C,2205,2507,904l,254SMO,253MA,CD4MCU,XM-19,17-4PH,15-5PH,17-7PH,660,C276,600,601,625,718,800,800H,825,926.etc |
| Products Diameter Range | φ3mm - φ350mm |
| Length | 6m/pcs or cutting any length as request |
| Surface | Pickling finishing, bright finishing |
| Standard | ASTM JIS,GB,DIN EN |
| Service | Cutting |
| Other Shape | Square , Flat, Hexagonal, Round.etc |
| Loading Port | Shanghai Port |
| MOQ | 50 kgs |
Hot Rolled 17-7PH Stainless Steel Round Bar Diameter 10 – 350mm SA276 Custom Cutting in Length
Overview
The Hot Rolled 17-7PH Stainless Steel Round Bar, available in diameters ranging from 10mm to 350mm, is a premium-grade precipitation-hardening (PH) stainless steel engineered for applications demanding high strength, excellent corrosion resistance, and dimensional stability at elevated temperatures. Compliant with ASTM A276/A276M-2017 standards, this semi-austenitic PH alloy—also known as UNS S17700 or AISI 631—offers a unique combination of formability in the annealed condition and exceptional mechanical properties after heat treatment.
Ideal for aerospace, defense, chemical processing, nuclear, and high-performance industrial sectors, our 17-7PH round bars are manufactured under strict quality controls and can be custom-cut to your exact length specifications, ensuring seamless integration into your production workflow.
Key Features & Benefits
- High Strength-to-Weight Ratio: Achieves tensile strengths up to 1380 MPa (200 ksi) after aging.
- Excellent Corrosion Resistance: Superior to standard martensitic stainless steels; comparable to 304 in many environments.
- Controlled Phase Transformation: Utilizes a “conditioning” heat treatment to transform unstable austenite into martensite, followed by precipitation hardening.
- Good Fabricability: In the annealed (Condition A) state, it exhibits ductility suitable for cold forming, machining, and welding.
- Dimensional Stability: Minimal distortion during heat treatment due to low carbon content and controlled microstructure.
- Custom Lengths Available: Cut-to-order service eliminates waste and reduces secondary processing costs.
Typical Applications
| Industry | Application Examples |
|---|---|
| Aerospace | Landing gear components, jet engine parts, fasteners, springs |
| Defense | Missile components, ordnance hardware, structural brackets |
| Chemical Processing | Valves, pumps, shafts exposed to mild acids and chlorides |
| Nuclear | Instrumentation housings, control rod drive mechanisms |
| Industrial Machinery | High-strength shafts, gears, diaphragms, snap rings |
| Food & Beverage | High-strength conveyor components (e.g., frozen food belts) |
Chemical Composition (ASTM A276 / UNS S17700)
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.09 |
| Manganese (Mn) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Chromium (Cr) | 16.00 – 18.00 |
| Nickel (Ni) | 6.50 – 7.75 |
| Aluminum (Al) | 0.75 – 1.50 |
| Iron (Fe) | Balance |
Note: Aluminum is the key precipitation-hardening element, forming Ni₃Al intermetallic phases during aging.
Mechanical Properties (After Standard Heat Treatment)
The mechanical properties of 17-7PH are highly dependent on the heat treatment condition. Below are typical values for common conditions:
| Condition | Process | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HRC) |
|---|---|---|---|---|---|
| Condition A | Annealed (1040°C, air cool) | 1035 min | 345 min | 20 min | ≤ 22 |
| Condition TH1050 | Austenite conditioning + Aging at 565°C | 1310 min | 1170 min | 1–5 | 38–44 |
| Condition RH950 | Sub-zero treatment + Aging at 510°C | 1380 min | 1240 min | 1–4 | 44–48 |
Custom heat treatment schedules available upon request for optimized performance.
Product Specifications
| Parameter | Details |
|---|---|
| Material Grade | 17-7PH (UNS S17700, AISI 631, 07Cr17Ni7Al) |
| Standard | ASTM A276/A276M-2017 |
| Form | Hot Rolled Round Bar |
| Diameter Range | 10 mm – 350 mm |
| Tolerance | ±0.1 mm to ±1.0 mm (depending on size and customer requirement) |
| Surface Finish | As-rolled (scale), pickled, or machined (optional) |
| Length Options | Standard: 3m, 4m, 6m Custom Cutting: Any length from 100mm to 6000mm |
| Certification | Mill Test Report (MTR) per EN 10204 3.1/3.2 available |
| Packaging | Bundled with steel straps, moisture-resistant wrapping, seaworthy export packaging |
Why Choose Our 17-7PH Round Bars?
✅ Precision Manufacturing: Produced in ISO 9001-certified mills with full traceability.
✅ Flexible Customization: Cut-to-length service reduces machining time and material waste.
✅ Global Compliance: Meets ASTM, AMS, and DIN standards; ideal for international projects.
✅ Technical Support: Our metallurgical team assists with heat treatment recommendations and application guidance.
✅ Fast Lead Times: Ready stock for common sizes; custom orders fulfilled within 2–4 weeks.
✅ Flexible Customization: Cut-to-length service reduces machining time and material waste.
✅ Global Compliance: Meets ASTM, AMS, and DIN standards; ideal for international projects.
✅ Technical Support: Our metallurgical team assists with heat treatment recommendations and application guidance.
✅ Fast Lead Times: Ready stock for common sizes; custom orders fulfilled within 2–4 weeks.
Heat Treatment Guidelines (Simplified)
To achieve optimal properties, 17-7PH typically undergoes a three-step process:
- Solution Annealing (Condition A): Heat to 1040°C, hold, then air cool. This yields a ductile austenitic structure for forming.
- Conditioning Treatment: Heat to 955°C, hold, then rapidly cool to -73°C (for RH950) or air cool (for TH1050). This promotes martensite formation.
- Aging: Precipitation hardening at 510–565°C for 1–4 hours, depending on desired strength/toughness balance.
Always consult a qualified heat treater or refer to AMS 5528/AMS 5667 for aerospace applications.
Ordering Information
When placing an order, please specify:
- Grade: 17-7PH (UNS S17700)
- Standard: ASTM A276
- Diameter: e.g., 50 mm
- Length: e.g., 2500 mm (custom)
- Quantity: in kg or pieces
- Surface Finish: As-rolled, pickled, or ground
- Heat Treatment Condition: As-supplied (usually Condition A) or pre-aged
- Certification Requirements: MTR, chemical analysis, mechanical test report
Frequently Asked Questions (FAQ)
Q: Can 17-7PH be welded?
A: Yes, but only in the annealed (Condition A) state. Post-weld heat treatment is required to restore mechanical properties.
A: Yes, but only in the annealed (Condition A) state. Post-weld heat treatment is required to restore mechanical properties.
Q: How does 17-7PH compare to 17-4PH?
A: 17-7PH offers better ductility and fatigue resistance; 17-4PH achieves higher hardness faster but has lower toughness.
A: 17-7PH offers better ductility and fatigue resistance; 17-4PH achieves higher hardness faster but has lower toughness.
Q: Is 17-7PH magnetic?
A: Yes—after martensitic transformation (post-conditioning), it becomes ferromagnetic.
A: Yes—after martensitic transformation (post-conditioning), it becomes ferromagnetic.
Q: What’s the maximum service temperature?
A: Continuous use up to 315°C (600°F); short-term exposure up to 480°C (900°F).
A: Continuous use up to 315°C (600°F); short-term exposure up to 480°C (900°F).
Conclusion
The Hot Rolled 17-7PH Stainless Steel Round Bar (10–350mm) represents the pinnacle of precipitation-hardening stainless technology—delivering unmatched strength, corrosion resistance, and thermal stability in a single alloy. With ASTM A276 compliance, custom cutting capabilities, and global technical support, our product ensures reliability in the most demanding engineering environments.
Whether you're designing a next-generation aircraft component or a high-cycle industrial spring, 17-7PH provides the performance backbone your project deserves.
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