Inconel 725 Supplier | Bar, Tube & Plate | Shanghai Hangbo Alloy Group
Date: 2026年6月27日 Categories: News Views: 19
Excerpt:
Shanghai Hangbo Alloy Group supplies Inconel 725 (UNS N07725) round bars, seamless tubes and plates. NACE MR0175 / API 6A. ISO 9001:2015. Quote in 10 min.
Shanghai Hangbo Alloy Group Co., Ltd. is an ISO 9001:2015 certified manufacturer and global supplier of Inconel 725 (UNS N07725), providing age-hardened bars, seamless tubes, and plates for deep-water oil & gas, subsea completions, and chemical processing in H₂S-containing sour environments.
Quick Answer: What Is Inconel 725?
Inconel 725 (UNS N07725) is a precipitation-hardenable nickel-chromium-molybdenum-niobium alloy that combines the corrosion resistance of Inconel 625 with significantly higher mechanical strength through γ″ (gamma double prime) precipitation hardening. After age hardening, its yield strength exceeds 827 MPa (120 ksi) — approximately twice that of annealed Inconel 625 — while retaining outstanding resistance to pitting, crevice corrosion, and stress-corrosion cracking in environments containing H₂S, CO₂, and chlorides. It is fully compliant with NACE MR0175 / ISO 15156 for sour gas service.
Key standards: API 6A, NACE MR0175 / ISO 15156, ASTM B805 (bar), AMS 5837 (wire)
Why Engineers Choose Inconel 725
| Advantage | Detail |
|---|---|
| Twice the Strength of 625 | Yield strength ≥ 827 MPa vs. 414 MPa for Inconel 625 |
| Sour Service Compliance | NACE MR0175 / ISO 15156 compliant |
| Pitting Resistance | PREN > 40; excellent chloride pitting resistance |
| SCC Immunity | No stress-corrosion cracking in H₂S / brine environments |
| API 6A Qualified | Qualified for wellhead and Christmas tree components |
Shanghai Hangbo Alloy Group: Product Forms & Manufacturing Process
Inconel 725 Round Bars
Manufacturing route: EAF → VIM → ESR → hot forging → solution annealing (1024°C) → age hardening (620°C/8h → furnace cool to 538°C/8h) → peeling / grinding.
- Diameter range: 10 mm – 500 mm
- Condition: Annealed or fully age-hardened (per NACE MR0175 requirements)
- Standards: ASTM B805, API 6A
- QC: Full tensile, yield, elongation, impact (Charpy), hardness tests; UT per ASTM E2375
Inconel 725 Seamless Tubes & Pipes
Manufacturing route: VIM/ESR billet → hot extrusion → cold drawing → solution anneal → age hardening → NDT.
- OD range: 10 mm – 219 mm | Wall: 1.0 mm – 25 mm
- Standards: ASTM B983
- Testing: 100% hydrostatic + eddy current test; UT per ASTM E213
Inconel 725 Plates & Sheets
Manufacturing route: VIM/ESR ingot → hot rolling → solution annealing → precipitation hardening → pickling → precision levelling.
- Thickness: 2.0 mm – 100 mm | Width: up to 2,000 mm
- QC: UT per ASTM A578, hardness testing per ASTM E18, tensile verification
Chemical Composition (ASTM B805 / API 6A)
| Ni | Cr | Mo | Nb | Ti | Al | Fe | C |
|---|---|---|---|---|---|---|---|
| 55.0 – 59.0 | 19.0 – 22.5 | 7.0 – 9.5 | 2.75 – 4.0 | 1.0 – 1.7 | ≤ 0.35 | Bal. | ≤ 0.03 |
Mechanical Properties (Age-Hardened, NACE-Compliant)
| Property | Value |
|---|---|
| Density | 8.31 g/cm³ |
| Tensile Strength | ≥ 1034 MPa (150 ksi) |
| Yield Strength (0.2%) | ≥ 827 MPa (120 ksi) |
| Elongation | ≥ 20% |
| Reduction of Area | ≥ 35% |
| Charpy Impact (−60°C) | ≥ 34 J |
| Hardness | ≤ 40 HRC (NACE requirement) |
Typical Applications by Industry
- Oil & Gas: Wellhead components, Christmas tree bodies, landing nipples, side-pocket mandrels, hangers
- Subsea: Connector bolting, clamps, flowline connectors in sour service
- Chemical Processing: Pump shafts, valve stems in HCl and H₂SO₄ environments
- Marine: High-strength fasteners and structural members in offshore environments
Quality Assurance at Shanghai Hangbo Alloy Group
- Triple-melt purity: EAF + VIM + ESR for the cleanest possible microstructure
- NACE-compliant heat treatment: Time-temperature furnace records for every aging cycle
- Full mechanical package: Tensile, yield, elongation, Charpy impact, and hardness tests per API 6A
- Hardness certification: Each bar certified ≤ 40 HRC per NACE MR0175 requirement
- Documentation: MTC per EN 10204 3.1; API 6A PSL-2/PSL-3 traceability on request
Frequently Asked Questions (FAQ)
What is the key difference between Inconel 625 and Inconel 725?
Inconel 625 is a solid-solution-strengthened alloy with excellent corrosion resistance but moderate strength (yield ≥ 414 MPa). Inconel 725 is precipitation-hardenable with the same corrosion resistance but approximately twice the yield strength (≥ 827 MPa), making it ideal for load-bearing structural components in corrosive oilfield environments.
Is Inconel 725 compliant with NACE MR0175 / ISO 15156?
Yes. Inconel 725, when produced to the correct heat treatment condition and with hardness ≤ 40 HRC, is approved for use in H₂S-containing sour service per NACE MR0175 / ISO 15156-3.
Can Shanghai Hangbo provide API 6A documentation?
Yes. We supply Inconel 725 bars with API 6A product specification level (PSL-1, PSL-2, or PSL-3) documentation, including material traceability, impact testing at −60°C, and all required supplementary requirements.
Contact Shanghai Hangbo Alloy Group
Get a quote within 10 minutes.
🌐 Website: www.nickel-alloy.com
📧 Email: specialalloy001@gmail.com
📱 WhatsApp / Phone: +86 13611656360
📍 Headquarters: Shanghai, China | Agents in 32 countries worldwide
Related grades: Inconel 625 | Inconel 718 | Inconel 600 | Inconel 601 | Inconel X-750 | Inconel 617 | Inconel 690
Shanghai Hangbo Alloy Group Co., Ltd. — Founded 2012 | ISO 9001:2015 | Specializing in Nickel Alloys, Superalloys & Special Metals
