HAYNES 188 Alloy Tube

Material:	Cobalt-Nickel-Chromium-Tungsten Alloy
Appearance:	Silvery metallic solid
Standard:	UNS R30188, ASTM B163/ ASME SB163, ASTM B516/ ASME SB516
Outer Diameter:	Seamless Tube: 3.175-101.6mm (0.125"-4") Welded Tube: 6.35-152mm (0.25"-6")
Wall Thickness:	0.5-5.6mm (0.02"-0.22") or customized
Finish:	Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF

 

Product Description

HAYNES 188 alloy tube is a high-performance cobalt-based superalloy designed for extreme temperature environments, offering exceptional oxidation resistance, thermal stability, and high-temperature strength. Composed primarily of cobalt, nickel, chromium, and tungsten, this alloy exhibits excellent mechanical integrity and creep resistance, making it ideal for aerospace, industrial gas turbines, and high-temperature chemical processing applications.

This tubing is available in both seamless and welded forms, ensuring flexibility for various applications. The seamless variant provides superior pressure resistance and structural integrity, while welded tubes offer cost-effective solutions for less demanding conditions. The high oxidation resistance up to 1095°C (2000°F) makes it ideal for heat exchangers, combustion systems, exhaust components, and high-temperature fluid transport.

Manufactured through precision extrusion, hot rolling, and welding techniques, HAYNES 188 alloy tubes ensure dimensional accuracy, smooth surface finish, and defect-free performance. Various surface finishes such as polished, annealed & pickled (AP), bright & annealed (BA), and mechanically finished (MF) further enhance corrosion resistance and longevity.

 

Features & Properties

✔ Exceptional High-Temperature Strength – Maintains mechanical stability at temperatures up to 1095°C (2000°F).
✔ Superior Oxidation Resistance – Prevents scaling and degradation in high-heat environments.
✔ Outstanding Creep & Thermal Fatigue Resistance – Ensures long-term performance under cyclic thermal conditions.
✔ Good Weldability & Fabrication – Easily welded, machined, and formed into custom configurations.
✔ Corrosion & Sulfidation Resistance – Suitable for extreme chemical processing conditions.

 

Applications & Related Industries

🔹 Aerospace Industry – Jet engine components, afterburners, exhaust ducts, and turbine combustion liners.
🔹 Industrial Gas Turbines – Heat exchanger tubing, burner nozzles, and power generation components.
🔹 Chemical & Petrochemical Processing – High-temperature fluid transport, heat recovery systems.
🔹 Defense & Military – Advanced propulsion systems, rocket engine components.

 

Synonyms

✅ Alloy 188 Tube
✅ UNS R30188 Tube

 

Health & Safety Information

⚠ Avoid inhaling dust or fumes during cutting or welding.
⚠ Use appropriate ventilation and protective equipment when handling high-temperature components.
⚠ Follow industry-standard safety procedures during machining and fabrication.

 

Production Method & Equipment

✔ Vacuum Induction Melting (VIM) & Vacuum Arc Remelting (VAR) – Ensures purity and defect-free structure.
✔ Hot Rolling & Extrusion – Enhances grain structure and mechanical properties.
✔ Seamless Tube Manufacturing – Precision extrusion for uniform wall thickness and strength.
✔ Welded Tube Fabrication – TIG or laser welding for consistent quality.
✔ Heat Treatment & Surface Finishing – Annealing and pickling for optimal corrosion resistance.

 

Size & Customization

✔ Outer Diameter:

Seamless Tube: 3.175-101.6mm (0.125"-4")

Welded Tube: 6.35-152mm (0.25"-6")
✔ Wall Thickness: 0.5-5.6mm (0.02"-0.22") or customized
✔ Finish Options: Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF (Mechanically Finished)
✔ Custom Lengths Available based on project specifications.

 

Certifications & Quality Assurance

✅ Conforms to ASTM, JIS, GB, EN, and BS standards
✅ Meets UNS R30188, ASTM B163/ASME SB163, ASTM B516/ASME SB516 requirements
✅ 100% Quality Inspection, including ultrasonic testing, eddy current testing, and mechanical property verification

 

Lead Time & MOQ

🚀 Lead Time: Varies based on order volume and specifications.
📦 MOQ: Contact for minimum order requirements.

 

FAQs

🔹 What temperature range can HAYNES 188 alloy tubes withstand?
HAYNES 188 alloy tubes provide excellent oxidation and structural stability up to 1095°C (2000°F).

🔹 Are both seamless and welded tube options available?
Yes, we offer seamless tubes for high-pressure applications and welded tubes for cost-effective solutions.

🔹 Can these tubes be customized?
Yes, we provide custom diameters, wall thicknesses, and finishes to meet your specific requirements.

 

How to Choose the Product

✅ Operating Temperature – Ensure compatibility with high-heat applications.
✅ Seamless vs. Welded – Choose seamless for high-pressure applications and welded for standard industrial use.
✅ Wall Thickness & Diameter – Select based on mechanical and fluid transport requirements.
✅ Surface Finish – Opt for polished, AP, BA, or MF finishes for enhanced corrosion resistance.

 

Product Specifications

✔ Material: Cobalt-Nickel-Chromium-Tungsten Alloy
✔ Density: 9.14 g/cm³
✔ Melting Point: 1330-1410°C (2425-2570°F)
✔ Tensile Strength: ≥850 MPa
✔ Hardness: Rockwell B80-B90

 

Production & Quality Control

HAYNES 188 alloy tubes undergo stringent quality checks, including:
✅ Vacuum melting and precision forging to ensure high-purity material.
✅ Ultrasonic and X-ray testing to detect internal defects.
✅ Dimensional accuracy verification to meet aerospace and industrial standards.

 

Shipping & Delivery Information

📦 Packaging: Secure wooden crates or custom protective packaging.
🚚 Shipping: Available via air, sea, or express delivery worldwide.
📅 Delivery Time: Depends on order volume and customization requirements.

 

Environmental Impact & Sustainability

♻ Recyclable Material – Supports eco-friendly manufacturing and material reuse.
♻ Sustainable Production – Advanced techniques reduce waste and emissions.

 

Maintenance & Care Instructions

✅ Store in a dry, controlled environment to prevent oxidation.
✅ Use proper handling and cutting techniques to maintain surface integrity.
✅ Follow correct welding and fabrication procedures for best performance.

 

Contact Us

For custom orders, bulk inquiries, or technical support, feel free to reach out to our team. 🚀

 

Chemical Composition

Element	Percent by Weight
Carbon	0.05 - 0.15%
Manganese	1.25% max
Silicon	0.20 - 0.50%
Chromium	20.0 - 24.0%
Nickel	20.0 - 24.0%
Tungsten	13.0 - 16.0%
Lanthanum	0.02 - 0.12%
Boron	0.015% max
Iron	3% max
Cobalt	Balance

Mechanical Properties

Yield Strength		Tensile Strength		Elongation
ksi	MPa	ksi	MPa	%
65	446	140	963	55

Physical Properties

Density	0.330 lb/in³ 9.14 g/cm³
Melting Range	2375-2425 °F 1300-1330 °C
Specific Heat	0.097 at 70 °F, Bru/lb °F 405 at 21 °C, J/kg °C
Permeability	1.0007 at 200 oersted
Coefficient of Expansion	6.6 0-200 °F, 10¯⁶ in/in•°F
Thermal Conductivity	84 Btu•in/ft²•h•°F W/wm•°C
Electrical Resistivity	613 ohm•circ mil/ft 102.0 microhm-cm

 

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