In high-risk industries such as nuclear power and aerospace propulsion, the biggest pain point in procurement is standards compliance. Standard 718 alloy often fails to meet the stringent internal integrity and dimensional requirements of ASTM B983.
At Gnee Steel, as a Tier 1 manufacturer, our GH4169 (Inconel 718 equivalent) pipes are fully compliant with ASTM B983, providing the industrial durability required for your critical projects.
Request a quote and a sample MTC 3.1 report now
ASTM B983 GH4169 Seamless Tube Manufacturer
ASTM B983 GH4169 Seamless Tube Manufacturer
ASTM B983 GH4169 (Inconel 718) seamless tubing is a high-strength nickel-chromium-molybdenum alloy tube designed for extreme environments, offering exceptional corrosion resistance and high-temperature performance (up to 700°C). They are widely used in high-pressure, critical applications in the aerospace, oil and gas, and petrochemical industries.
What is the composition of GH4169 alloy?
The chemical composition of GH4169 alloy is as follows: Ni 53.44%, Cr 18.56%, Mo 3.02%, Nb 5.3%, Al 0.44%, Ti 1.04%, C 0.026%, P 0.005%, S 0.001%, B 0.002%, Fe balance (wt.%).
1. GH4169 Alloy Tube Equivalent Material
We supply Inconel 718 pipes that meet internationally recognized standards and global regulatory requirements. The main designations for this grade include UNS N07718 and DIN 2.4668. It is also known for its high strength, pitting resistance, and fracture toughness under extreme conditions.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| Inconel 718 | N07718 | / | GH4169 | NCF718 | / | 2.4668 | / |
2. Gnee Alloy GH4169 product availability forms
| Tube Type | Outside Diameter (OD) | Wall Thickness (WT) | Standard Compliance |
| Seamless Pipe | 6.0 mm - 219.0 mm | 0.5 mm - 25.0 mm | ASTM B983, AMS 5589 |
| Precision Tubing | 3.0 mm - 50.0 mm | h8 - h11 Tolerance | AMS 5590 |
| Instrumentation | 1/16" to 1" NPS | Sch 10, 40, 80, XXS | ASME SB637 / B670 |
Custom machining: Need non-standard wall thickness? We offer custom perforation and drawing services to meet the precise specifications of your drawings.
Contact us to customize GH4169 products to fit your project dimensions
3. Common Applications of GH4169 Seamless Steel Tubes
Aerospace: High-pressure hydraulic lines and fuel lines.
Oil & Gas: Downhole control lines, chemical injection lines, and subsea hydraulic lines.
Power Generation: Steam generators and heat exchangers in nuclear power plants.
4. Advantages of GH4169 Seamless Tubes with VIM + VAR
To meet the high purity requirements of ASTM B983, our GH4169 material is refined using a VIM (Vacuum Induction Melting) + VAR (Vacuum Arc Remelting) process.
Zero Inclusions: Eliminates dissolved gases and volatile impurities.
No Segregation: Prevents "spotting" and ensures excellent wall strength at 700°C (1292°F).
Result: The material exhibits superior high-cycle fatigue life and structural stability.
VIM (Vacuum Induction Melting) + VAR (Vacuum Arc Remelting) process
5. Gnee Steel GH4169 Seamless Pipe Testing
As a trusted supplier, Gnee Steel understands that trust is built on verifiable data. Every meter of our pipe undergoes rigorous inspection processes:
100% Non-Destructive Testing: Ultrasonic (UT) and Eddy Current (ET) testing are standard procedures.
Hydraulic Pressure Testing: Verified to withstand high internal pressures conforming to ASME B31.3 standards.
Traceability: Each pipe is marked with a furnace number and accompanied by complete documentation.
Global Compliance: Materials comply with AS9100 and ISO 9001 quality audit standards.
Why choose to source directly from the Gnee Alloy factory?
✅️Factory Direct Pricing: Eliminate middlemen and enjoy wholesale pricing advantages.
✅️Small Batch Order Support: We maintain standard-sized inventory to support R&D and prototyping, with low minimum order quantities.
✅️Global Logistics: Fast and secure shipping to Europe, the USA, the UAE, and Southeast Asia.
✅️Technical Support: Our engineers provide material selection advice to ensure you get the most cost-effective solutions.
Gnee Steel GH4169(inconel 718) Certificate
📦 Packaging and Shipping
All Nickel Based Alloy products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Gnee Steel GH4169 Product Packing
Contact us for the latest export price quote for GH4169 Alloy
FAQ
Q1: Is GH4169 technically equivalent to Alloy 718 for ASTM B983?
A: Yes. GH4169 is the technical designation used in GB standards for the same metallurgical system as Inconel 718 (UNS N07718). Our material meets all international requirements for chemical and mechanical parity.
Q2: What is the benefit of the h8-h11 tolerance for precision tubing?
A: Precision tolerances ensure a perfect fit for automated assembly and high-speed CNC machining of aerospace connectors and sensor housings, significantly reducing your secondary processing costs.
Q3: Can you provide tubes for sour gas (H2S) service?
A: Yes. When heat-treated to meet NACE MR0175 requirements, our GH4169 seamless tubes are the premier choice for downhole tools and high-pressure valves.
Q4: Do you offer "Cut-to-Length" services?
A: Absolutely. We offer precision bandsaw cutting to provide ready-to-install pipe sections, reducing your on-site labor and material waste
