Inconel 690 Pipes – High-Performance Nickel Alloy Pipes for Extreme Environments
ASC LLP is a trusted manufacturer, exporter, and supplier of Inconel 690 Pipes, delivering high-quality nickel alloy solutions globally. Known for their exceptional resistance to heat, oxidation, and corrosion, Inconel 690 Pipes are ideal for high-temperature and high-pressure industrial environments.
We specialize in a wide variety of Inconel 690 Pipe types, including Inconel 690 Seamless Pipes, Inconel 690 Welded Pipes, Inconel 690 ERW Pipes, and Inconel 690 EFW Pipes, all available in custom sizes, thicknesses, and finishes.
What is Inconel 690?
Inconel 690, also known by its UNS designation UNS N06690, is a high-chromium nickel alloy. It offers outstanding resistance to a wide range of corrosive media, especially hot gases, acids, and steam. It contains approximately 58% nickel, 28-31% chromium, and 8-10% iron, giving it superior structural stability and corrosion resistance.
This material is commonly used in nuclear power plants, chemical processing, steam generators, and other high-temperature equipment. It is also registered under DIN 2.4856 and manufactured according to standards like ASTM B444 and ASME SB-444.
Advantages of Inconel 690 Pipes
- High-Temperature Resistance: Performs reliably up to 1200°C
- Superior Corrosion Resistance: Particularly against acids, oxidizing salts, and steam
- Oxidation Resistance: Outstanding in both air and combustion gases
- Stress Corrosion Cracking Resistance: Especially in chloride-bearing environments
- Versatile Fabrication: Easily welded, machined, and formed into complex shapes
Types of Inconel 690 Pipes We Offer
We supply a wide range of Inconel 690 Pipe variants to meet specific project requirements across industries:
1. Inconel 690 Seamless Pipes are manufactured without welds, ensuring uniform strength and structure. These pipes are ideal for high-pressure applications such as heat exchangers, condensers, and nuclear steam generators.
- Specifications: ASTM B163, ASTM B444
- Material Grade: UNS N06690 / DIN 2.4856
- Form: Round, square, and rectangular
2. Inconel 690 Welded Pipes are produced by welding flat-rolled metal into pipe form. These are more cost-effective and suitable for medium to low-pressure applications.
- Manufactured in accordance with ASME SB-444
- Available in various sizes and wall thicknesses
- Smooth internal surface and long service life
3. Inconel 690 ERW Pipes (Electric Resistance Welded) are manufactured using electric resistance welding, making them ideal for structural and industrial applications where precision and mechanical strength are crucial.
- Cost-efficient and easy to fabricate
- Uniform wall thickness
- Widely used in the petrochemical and oil & gas industries
4. Inconel 690 EFW Pipes (Electric Fusion Welded) are formed by electric fusion welding, mainly used in chemical, power generation, and high-temperature service conditions.
- Suitable for highly corrosive environments
- High strength at elevated temperatures
5. ASTM B444 Alloy 690 Square Pipes offer added strength and are ideal for modern structural and aesthetic designs in construction and industrial frameworks.
- Smooth finish with high dimensional accuracy
- Resistant to corrosion and thermal expansion
6. Inconel DIN 2.4856 Rectangular Pipes are often used in structural supports, chemical plant frames, and other custom fabrication industries.
- Excellent weldability and machinability
- Available in various wall thicknesses and lengths
Schedule and Size Chart for Inconel 690 Pipes
| Schedule (SCH) | Nominal Pipe Size (NPS) | Outside Diameter (OD) | Wall Thickness | Pipe Type |
| SCH 5S | 1/2″ – 24″ | 21.3 mm – 610 mm | 1.65 mm – 7.80 mm | Seamless / Welded |
| SCH 10S | 1/2″ – 24″ | 21.3 mm – 610 mm | 2.11 mm – 9.27 mm | ERW / Seamless |
| SCH 40S (STD) | 1/2″ – 24″ | 21.3 mm – 610 mm | 2.77 mm – 11.13 mm | Seamless / Welded / EFW |
| SCH 80S (XS) | 1/2″ – 24″ | 21.3 mm – 610 mm | 3.73 mm – 17.48 mm | Seamless / ERW |
| SCH 160 | 1/2″ – 24″ | 21.3 mm – 610 mm | 4.78 mm – 31.75 mm | Seamless / Welded |
| XXS | 1/2″ – 24″ | 21.3 mm – 610 mm | 5.54 mm – 38.10 mm | Seamless |
Mechanical Properties Chart for UNS N06690 Inconel Pipes
| Property | Value (Metric) | Standard |
| Tensile Strength, min | 620 MPa (90 ksi) | ASTM B444 / B163 |
| Yield Strength, 0.2% offset min | 310 MPa (45 ksi) | ASTM B444 / B163 |
| Elongation in 50 mm, min | 30% | ASTM B444 / B163 |
| Hardness (Rockwell B) | ≤ 85 HRB | ASTM B444 |
| Modulus of Elasticity | ~207 GPa | Reference Value |
| Impact Strength (Charpy V-Notch) | Good at elevated temp. | Application Dependent |
Key Standards and Designations of Inconel 690 Seamless Pipes
| Standard | Description |
| ASTM B444 | Seamless and Welded Pipes made from nickel-chromium-iron alloys |
| ASME SB-444 | Seamless/Welded Pipes for high-temperature service |
| ASTM B163 | Seamless Pipes for heat exchanger and condenser applications |
| UNS N06690 | Unified Numbering System designation for Inconel 690 |
| DIN 2.4856 | European standard designation for Inconel 690 |
Chemical Composition Chart for ASTM B163 Inconel 690 Seamless Pipes
| Element | Minimum (%) | Maximum (%) | Function / Role |
| Nickel (Ni) | 58.0 | Balance | Base metal; provides excellent corrosion resistance and high-temperature strength |
| Chromium (Cr) | 27.0 | 31.0 | Enhances oxidation resistance, particularly in acidic and high-temperature environments |
| Iron (Fe) | 7.0 | 11.0 | Improves mechanical strength and toughness |
| Silicon (Si) | — | 0.50 | Deoxidizer; improves surface finish and oxidation resistance |
| Manganese (Mn) | — | 0.50 | Enhances hot-working properties and deoxidation |
| Carbon (C) | — | 0.05 | Controlled to improve weldability and corrosion resistance |
| Sulfur (S) | — | 0.015 | Kept low to prevent hot cracking during welding |
| Aluminum (Al) | — | 0.50 | Enhances oxidation resistance and stability |
| Titanium (Ti) | — | 0.50 | Improves strength at elevated temperatures |
| Copper (Cu) | — | 0.50 | Controlled for better corrosion resistance |
Inconel 690 Pipe Properties
| Property | Value |
| Density | 8.19 g/cm³ |
| Melting Point | 1343–1377°C |
| Tensile Strength | ≥ 620 MPa |
| Yield Strength | ≥ 310 MPa |
| Elongation | ≥ 30% |
| Corrosion Resistance | Excellent in acidic and high-temperature environments |
| Weldability | Good with proper filler materials |
Applications of Inconel 690 Pipes
Thanks to their unique composition and thermal stability, Inconel 690 Pipes are used in:
- Nuclear Power Plants: Steam generators, heat exchangers, tubing
- Chemical Processing: Acid tanks, reactors, distillation towers
- Petrochemical Industry: High-pressure piping, sulfuric acid service lines
- Power Generation: Superheater tubes, reheater tubing
- Marine & Aerospace: Corrosion-resistant structural piping
Why Choose ASC LLP for Inconel DIN 2.4856 pipes?
At ASC LLP, we are known for:
- Global Supply Chain: Delivering to over 90 countries
- Certified Manufacturing: ISO, PED, and ASME certified processes
- Customized Solutions: Pipes available in various shapes – round, square, and rectangular
- On-Time Delivery: Prompt shipping and packaging for domestic and export orders
- Customer-Centric Approach: Technical support and material traceability provided
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality Inconel 690 Pipes. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
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