Monel K500 Tube for High-Strength Subsea Hydraulic Lines

Our Monel K-500 tube is a heavy-duty champ for high-strength subsea hydraulic lines, built to thrive in the brutal conditions of deep-sea oil and gas operations. This nickel-copper alloy, with about 65% nickel, 30% copper, and a boost from aluminum and titanium, is our top pick for applications where strength, corrosion resistance, and reliability are critical.

What makes Monel K-500 tube stand out is its incredible mechanical strength and hardness, thanks to the aluminum and titanium additions. It’s perfect for hydraulic lines, valve tubing, and fittings in subsea systems, where components face extreme pressure, vibrations, and corrosive seawater. This tube resists pitting and stress corrosion cracking, ensuring your hydraulic systems keep running smoothly, even miles below the surface.

This tube’s versatility is a major win. It’s stable up to 650°C, which is great for subsea hydraulic systems exposed to moderate heat, like those near hot oil flows or high-pressure pumps. Its moderate electrical conductivity (~3-4% IACS) is useful for applications with electrical integration, and its high fatigue resistance ensures it holds up under constant stress. From deep-sea rigs to subsea pipelines, Monel K-500 delivers.

We love how workable this tube is, even with its extra toughness. You can bend, weld, or shape it into whatever your subsea hydraulic design needs—seamless tubes for high-pressure lines or welded ones for cost efficiency. Need a custom diameter, wall thickness, or length? We can tailor it to fit your specs, keeping your project on track and manufacturing smooth.

The subsea industry’s all about materials that are tough, corrosion-resistant, and sustainable, and Monel K-500 tube checks every box. It’s recyclable, which is awesome for eco-friendly projects, and its long lifespan means less waste from replacements. With offshore oil and gas exploration growing—alongside subsea renewable energy like tidal power—demand for high-performance materials like Monel K-500 is soaring. Its durability supports the trend toward low-maintenance, efficient subsea systems.

Parameter:

Item	Ni	Cu	Fe	Mn	C	Si	S
Monel 400	≥63	28-34	≤2.5	≤2	≤0.3	≤0.5	≤0.025

Item	Ni	Cu	Al	Ti	Fe	Mn	S	C	Si
Monel K500	≥63	27-33	2.3-3.15	0.35-0.85	≤2	≤1.5	≤0.01	≤0.25	≤0.5

Item	Density	Melting point	Tensile Strength	Yield Strength	Elongation	HB
Monel 400	8.83 g/cm3	1300-1390℃	480	170	35%	≥331

Item	Density	Melting point	Tensile Strength	Yield Strength	Elongation
Monel K500	8.05 g/cm3	1288-1343℃	1100	790	20%

Monel 400	Bar / Rod	Forging	Pipe	Sheet / Strip	Welding Wire
Standard	ASTM B164	ASTM B564	ASTM B165	ASTM B127	ErNiCu-7

Monel K500	Bar/Rod	Forging	Pipe	Sheet/Strip	Welding Wire
Standard	ASTM B864	AMS4676	ASTM B865	ASTM B564	ErNiCu-7

For more details, pls directly contact us.

Our Monel K-500 tube sets the standard because we’re all about quality, customization, and customer success. We offer a wide range of diameters, wall thicknesses, and lengths, with fast delivery for both small and large orders. Our team dives into your project, optimizing the tube for your subsea hydraulic lines to ensure maximum strength and corrosion resistance in deep-sea conditions. We keep pricing competitive, especially for bulk orders, without cutting corners on quality. Our sustainable production process uses recyclable materials, aligning with green industry trends. Plus, our hands-on support means you’re always covered—whether it’s technical guidance or a custom solution, we make it happen.

Compared to other materials, our Monel K-500 tube is a standout. Monel 400 is a corrosion king but lacks K-500’s strength for high-pressure subsea applications. Stainless steel 316 is tough but struggles with chloride corrosion in seawater, unlike K-500. Inconel 625 is great for extreme heat but pricier and less fatigue-resistant in some cases. Our tube is the ultimate choice for high-strength subsea hydraulic lines.

We craft our Monel K-500 tube to meet strict standards like ISO 9001, ensuring quality you can trust every time. Whether you’re building hydraulic lines for subsea rigs or valve tubing for offshore systems, this tube’s ready to perform. Got a unique spec in mind? Let us know, and we’ll make it happen.

About Us:

Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications. 

For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.

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FAQs:

1. What is Monel K-500 tube made of?
   It’s a nickel-copper alloy with about 65% nickel, 30% copper, plus aluminum and titanium for high strength and hardness.

2. What are the main uses for Monel K-500 tube in subsea applications?
   It’s used for high-strength hydraulic lines, valve tubing, and fittings in subsea oil and gas systems.

3. How does Monel K-500 tube perform in subsea environments?
   It’s a beast, resisting seawater corrosion and handling extreme pressure and mechanical stress.

4. Can Monel K-500 tube handle high temperatures?
   Yep, it’s stable up to 650°C, ideal for subsea hydraulic systems with moderate to high heat.

5. Is Monel K-500 tube cost-effective?
   It’s pricier than Monel 400, but its strength and durability in subsea conditions make it a smart long-term choice.

6. How does Monel K-500 tube compare to Monel 400 tube?
   K-500 offers higher strength and hardness, while Monel 400 has slightly better corrosion resistance in seawater.

7. Can Monel K-500 tube be customized?
   Totally! We can adjust diameter, wall thickness, or length to meet your specific subsea hydraulic line needs.

8. Is Monel K-500 tube environmentally friendly?
   It’s recyclable, supporting sustainable practices, and its long lifespan reduces waste from replacements.