Your trusted manufacturer of nickel-based superalloys and high-performance stainless steel since 2008-Gnee Alloy
Since 2008, Gnee Alloy has served as a professional manufacturer and trusted supply chain partner for global clients across oil & gas, aerospace, petrochemical, power generation and marine engineering sectors. For project engineers, procurement managers and technical decision-makers who demand strict material compliance, stable high-temperature performance and reliable corrosion resistance, we deliver end-to-end alloy solutions from vacuum smelting to finished product delivery.
We ensure every batch of Inconel, Incoloy, Monel and Hastelloy alloys meets stringent international and regional standards including ASTM, ASME, AMS and KS. We combine large-scale stable production capacity with dedicated technical support to solve complex material challenges for industrial projects worldwide.
The Development History of Gnee Alloy
2008
Founded in China, focusing on special alloy smelting and precision processing
2012
Introduced imported vacuum induction melting line, expanded nickel-based superalloy production capacity
2015
Established formal quality management system and material certification framework, began serving international customers in Europe, the Middle East and Southeast Asia.
2018
Upgraded rolling and precision testing equipment, realized full in-house production from smelting to finished processing
2022
Launched aerospace-grade alloy production line, obtained AS9100 aviation quality system certification
2025
Continuously improve the high‑end superalloy delivery system and build a global service network, delivering stable custom‑material solutions for worldwide high‑end equipment industries.
Gnee Alloy Factory Production and End-to-End Quality Control
Gnee Alloy Core Production Equipment for Nickel-Based Alloys
US-imported vacuum induction furnace + German-made vacuum consumable arc furnace: Enables precise compositional control for over 15 grades of nickel-based superalloys.
2800mm four-high reversing rolling mill: Supports custom plate sizes up to 2.6m × 16m with strict control over thickness tolerances.
Cold-drawn and hot-rolled pipe production lines: Capable of producing seamless pipes with single-piece lengths up to 15m; offers pickling and bright annealing surface treatments.
Comprehensive vacuum annealing furnaces: Ensure uniform material properties, meeting the requirements for long-term high-temperature service conditions.
Gnee Alloy Main Nickel Based Alloy Products
Contact our experts to recommend the right alloy for your project
Gnee Alloy Nickel-Based Alloy Production Process
1. Raw Material Intake: 100% spectral analysis of chemical composition
2. Melting Stage: Heat-by-heat composition verification with full heat number traceability
3. Forming Stage: Dimensional inspection at each processing step
4. Heat Treatment: Full process recording and sampling tests for mechanical properties
5. Finished Products: 100% UT/ET non-destructive testing (NDT), plus dimensional and visual inspections
6. Pre-shipment: Review and verification of complete Mill Test Certificate documentation
Click to view the production process for Gnee Alloy's nickel-based alloy products
GNEE ALLOY Nickel Alloy Delivery Cases
Case 1：
Project Overview: 20 tons Inconel 713C nickel-based superalloy round bars, produced to ASTM B637 standard.
Application Scenario: Fabrication of high-temperature load-bearing components for overseas aerospace and energy equipment.
Key Technical Points：Inconel 713C easily suffers uneven grain structure and surface oxidation during heat treatment. We used vacuum-melted raw material and staged heat treatment to stabilize grain size. Every bar passed PMI composition check and Rockwell hardness sampling. Each bar was wrapped with anti-rust plastic film, bundled with soft strapping, and packed in fumigated heat-treated wooden crates to avoid scratches and oxidation in transit.
Delivery Outcome：All products passed pre-shipment sampling inspection and were delivered within agreed lead time. We issued full EN 10204 3.1 mill test certificates containing heat analysis, mechanical and NDT records. Fumigated wooden cases meet international export standards. The shipment finished export formalities and passed the end-user's on-site incoming acceptance.
Contact us to get technical data and quotations for Inconel 713C round bars.
View Inconel 713C Product Page →
Case 2：
Project Overview: 5 tons Inconel 625 nickel alloy seamless tubes, bright annealed condition.
Application Scenario: Corrosion-resistant piping assemblies for high-pressure industrial process systems.
Key Technical Points：Bright annealing demands low-oxygen environments to retain the bright surface of Inconel 625 tubes. We adopted protective-atmosphere furnace annealing to prevent scaling. Each tube went through 100% eddy current and ultrasonic NDT. Tube ends were fitted with plastic plugs, bundles wrapped with VCI anti-rust film and cushioned, then loaded into individual fumigated wooden crates against impact damage.
Delivery Outcome：Dimensional, surface and non-destructive test results fully complied with ASTM B163. We supplied a complete document set with heat records, annealing logs and inspection reports. Goods shipped on schedule. The special packaging kept bright surfaces intact after transit, and the batch passed the buyer's incoming quality audit smoothly.
Reach out for specifications and pricing of bright annealed Inconel 625 seamless tubes.
View Inconel 625 Product Page →
Chemical Composition Analysis
Mechanical Testing
PMI
UT
PT
RT
Hardness
Impact Test
Metallographic Examination
Corrosion Test
Hydro Test
Gnee Alloy Nickel Based Alloy PMI Test
GNEE Product Packaging And Shipping
We adopt standard export seaworthy packaging solutions to ensure product safety during long-distance international transportation:
Standard packaging: Waterproof anti-rust paper + steel strap binding + wooden case / steel pallet reinforcement
Custom packaging available according to client specific requirements
Container loading: 6m lengths for 20ft containers, 12m lengths for 40ft containers; we provide full loading photos and container sealing records
Transport options: Sea freight, railway freight, air freight, supporting door-to-door delivery service
Delivery cycle: 7-15 days for stock items, 25-30 days for custom orders, with real-time logistics tracking updates
Contact us to select your preferred packaging and shipping method
Gnee Alloy Nickel-Based Alloy Product Quality Inspection Report
Gnee Alloy Nickel-Based Alloy Product Quality Inspection Report
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Gnee Alloy's nickel-based alloy products undergo 100% UT/ET non-destructive testing, spectral analysis, mechanical property testing, and dimensional inspection. Gnee Alloy holds SGS certification and has obtained ISO9001 and EN 10204 3.1B certifications, as well as relevant heat treatment and non-destructive testing reports, ensuring that all nickel-based alloy pipes and fittings meet quality requirements.
Our Address
25th Floor, Huafu Commercial Center, Anyang, Henan Province, China
Phone Number
+86 15824687445
ss@gneesteel.com
