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ASTM B535 NiFeCrSi Alloy Seamless Pipe
ASTM B535 is the standard specification for "Seamless Tube of Nickel-Iron-Chromium-Silicon Alloys".
This standard covers seamless tubes and pipes intended for heat-resisting and general corrosive service, made from a specific family of nickel-iron-chromium-silicon alloys. The most common alloys under this specification are UNS N08330 and UNS N08332.
The standard defines the requirements for chemical composition, mechanical properties, dimensions, and testing for these seamless pipes.
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ASTM B535 NiFeCrSi Alloy Seamless Pipe Supplier
Professional NiFeCrSi Alloy Seamless Pipe Manufacturer for High-Temperature Industrial Applications
ASTM B535 NiFeCrSi alloy seamless pipe is a high-performance heat resistant nickel alloy tube designed for extreme temperature environments requiring excellent oxidation resistance, thermal stability, and long-term structural reliability. Compared with conventional stainless steel tubing, NiFeCrSi alloy seamless pipe offers superior resistance to carburization, scaling, thermal fatigue, and high-temperature corrosion.
Xi'an Dongmeng Group Co., Ltd specializes in manufacturing and exporting ASTM B535 seamless nickel alloy pipes and tubes for demanding industries including petrochemical processing, industrial furnaces, heat treatment systems, power generation, and thermal engineering projects.
Our factory supplies:
ASTM B535 NiFeCrSi seamless pipes
Heat resistant alloy tubes
High temperature nickel alloy tubing
Furnace radiant tubes
Custom nickel alloy seamless tubing
Industrial thermal processing pipes
With advanced seamless pipe production lines, strict inspection systems, and international export experience, we provide reliable nickel alloy piping solutions for EPC contractors, industrial distributors, and OEM manufacturers worldwide.
UNS N08330 and UNS N08332
These alloys are renowned for their excellent resistance to oxidation, carburization, and thermal cycling at high temperatures.
Common Names:
UNS N08330: Commonly known as Alloy 330 (Werkstoff Nr. 1.4886).
UNS N08332: A variant with improved resistance to carburization and sulfidation, often called Alloy 332 or RA 330.
Characteristics and Composition
| Feature | UNS N08330 (Alloy 330) | UNS N08332 (Alloy 332) |
|---|---|---|
| Common Name | Alloy 330, 1.4886 | Alloy 332, RA 330 |
| Key Composition | 35% Ni, 19% Cr, 45% Fe, 1.0-1.5% Si | 35% Ni, 19% Cr, 45% Fe, 1.8-2.5% Si |
| Key Characteristics | Excellent strength and resistance to oxidation, carburization, and thermal cycling. Good resistance to chlorine attack. | Enhanced version with higher Silicon, providing superior resistance to carburizing atmospheres and sulfidation. |
| Primary Advantage | A versatile, general-purpose heat-resistant alloy with good strength from room temperature to 2100°F (1150°C). | Maximum protection in severe carburizing and sulfur-containing environments. |
| Relationship | The industry-standard workhorse for high-temperature furnaces. | A specialized upgrade for the most aggressive carburizing conditions. |
ASTM B535 UNS N08330 and N08332 Chemical Composition:
ASTM B535 UNS N08330 and N08332 Mechanical properties
ASTM B535 UNS N08330 and N08332 permissible variations
Why the Nickel (Ni) and Chromium (Cr) Content is Critical
Nickel (35%): Provides austenitic stability, ductility, and resistance to thermal cycling, carburization, and chlorine-containing atmospheres.
Chromium (19%): Forms a protective, adherent chromium oxide scale on the surface, providing excellent resistance to oxidation (scaling) and sulfidation.
Why the Silicon (Si) Content is Critical:
Silicon further enhances the formation of a protective surface scale, significantly improving resistance to carburization (carbon pickup) and sulfidation (sulfur attack). The higher silicon in N08332 makes it the preferred choice for the most severe conditions.
Physical Properties
| Property | Value |
|---|---|
| Density | 7.8 – 8.1 g/cm³ |
| Melting Range | 1350 – 1400°C |
| Thermal Conductivity | 11 – 15 W/m·K |
| Electrical Resistivity | 1.0 – 1.3 μΩ·m |
| Thermal Expansion | 14 – 16 μm/m·°C |
Machining Performance Analysis
Excellent Machinability for Precision Industrial Components
ASTM B535 NiFeCrSi alloy seamless tube can be processed through:
CNC turning
Precision cutting
Deep hole machining
Automatic welding preparation
Tube bending
End forming
Machining Recommendations
Use carbide tooling for stable cutting performance
Apply moderate cutting speed
Use high-quality coolant for heat dissipation
Suitable for precision thermal equipment manufacturing
Our factory supports:
CNC machining service
Pipe beveling
Precision cutting
Custom length production
Surface polishing
OEM fabrication
Welding Performance Analysis
Superior Weldability for Industrial Pipeline Systems
NiFeCrSi alloy seamless pipes offer excellent welding compatibility in high-temperature process systems.
Recommended Welding Methods
GTAW / TIG Welding
GMAW / MIG Welding
Plasma Arc Welding
Automatic Orbital Welding
Welding Advantages
Stable weld structure
Reduced hot cracking tendency
Excellent high-temperature joint strength
Good post-weld oxidation resistance
Professional welding procedures ensure reliable performance in petrochemical pipelines, furnace systems, and thermal processing equipment.
Corrosion Resistance Analysis
Outstanding Oxidation & High-Temperature Corrosion Resistance
ASTM B535 NiFeCrSi alloy pipe performs exceptionally well in:
Oxidizing atmospheres
Thermal cycling environments
Carburizing atmospheres
Sulfidation conditions
High-temperature industrial gas systems
Corrosion Resistance Features
Excellent scaling resistance
Long-term thermal oxidation stability
Strong resistance to thermal shock
Reduced surface degradation under continuous heat exposure
Compared with standard stainless steel tubes, NiFeCrSi alloy seamless tubing provides significantly longer service life in extreme industrial heat applications.
Industry Applications
Industrial Furnace Industry
Applications:
Furnace radiant tubes
Burner systems
Heat treatment lines
Retort tubes
Benefits:
High thermal stability
Long service life
Oxidation resistance
Power Generation Industry
Applications:
Boiler systems
Waste heat recovery units
Exhaust gas pipelines
Thermal transfer systems
Benefits:
Stable mechanical strength
High-temperature durability
Reliable thermal conductivity
Petrochemical Industry
Applications:
High-temperature process pipelines
Reformer tubes
Thermal cracking systems
Heat exchangers
Benefits:
Corrosion resistance
High-pressure reliability
Excellent thermal fatigue resistance
Thermal Processing Equipment
Applications:
Annealing systems
Continuous heat treatment furnaces
Industrial kilns
Thermal reactors
Benefits:
Excellent scaling resistance
Reliable cyclic heating performance
Reduced maintenance costs
ASTM B535 NiFeCrSi Alloy Seamless Pipe Specifications
| Outside Diameter | Wall Thickness | Length |
|---|---|---|
| 6 mm – 610 mm | 0.5 mm – 40 mm | Up to 12 m |
Available Supply Forms
Seamless Pipe
Seamless Tube
Precision Tube
Annealed Tube
Pickled Tube
Polished Tube
Surface Finish
Bright Annealed
Pickled
Industrial Finish
Polished Finish
Size Standards
Metric Sizes
Imperial Sizes
SCH 10 / SCH 40 / SCH 80
Custom OEM Dimensions
Manufacturing Standards
International Standards
ASTM B535
ASME SB535
ASTM A999
ASTM A1016
EN / DIN Equivalent Standards
Inspection Standards
PMI Testing
Ultrasonic Testing
Eddy Current Testing
Hydrostatic Testing
Dimensional Inspection
Production Capability
Advanced Nickel Alloy Seamless Pipe Manufacturing
Xi'an Dongmeng Group Co., Ltd operates advanced production facilities for seamless nickel alloy pipe manufacturing.
Production Advantages
Hot extrusion production lines
Cold drawing precision systems
Solution annealing furnaces
Automatic polishing equipment
CNC machining support
Export Capability
Global export packaging
Fast production lead time
OEM customization
Multi-country project supply
Industrial bulk order support
Inspection & Quality Assurance
Strict Industrial Quality Control System
Every ASTM B535 NiFeCrSi alloy seamless pipe undergoes comprehensive quality inspection before shipment.
Inspection Process
Raw material verification
Chemical composition analysis
Mechanical property testing
Dimensional inspection
Surface quality inspection
Eddy current testing
Ultrasonic testing
Hydrostatic pressure testing
Quality Documents Available
EN 10204 3.1 Certificate
Mill Test Certificate (MTC)
PMI Report
Third-Party Inspection Report
SGS / BV / TUV Inspection Support
Our inspection system ensures stable quality for high-temperature industrial projects worldwide.
Professional Export Packaging for Nickel Alloy Pipes
We provide secure export packaging solutions for global industrial transportation.
Packaging Methods
Wooden export cases
Waterproof wrapping
Plastic end caps
Steel bundle packing
Container loading protection
Shipping Support
Sea Freight
Air Freight
Rail Transportation
FOB / CIF / DDP Terms
Global Logistics Coordination
Why Choose Xi'an Dongmeng Group Co., Ltd
Trusted Industrial Nickel Alloy Pipe Supplier
Factory Direct Supply
Competitive pricing from professional nickel alloy manufacturer.
Rich Export Experience
Serving industrial customers in Europe, Middle East, Southeast Asia, and North America.
Full Customization Support
Custom dimensions, processing, packaging, and OEM production available.
Strict Quality Control
Comprehensive inspection system with third-party certification support.
Fast Response Service
Professional technical sales team for quick quotation and engineering assistance.
Stable Global Supply
Reliable production capacity for bulk industrial procurement projects.
FAQ
What is ASTM B535 NiFeCrSi alloy seamless pipe?
ASTM B535 NiFeCrSi alloy seamless pipe is a heat resistant nickel alloy tube designed for high-temperature industrial environments requiring oxidation resistance, thermal stability, and corrosion resistance.
What industries commonly use NiFeCrSi alloy tubes?
Typical industries include:
Petrochemical processing
Industrial furnace manufacturing
Power generation
Heat treatment systems
Thermal engineering equipment
What is the maximum operating temperature?
Depending on application conditions, ASTM B535 NiFeCrSi alloy pipes can operate continuously in high-temperature environments exceeding 1000°C.
Can you provide custom pipe sizes?
Yes. We support custom outside diameter, wall thickness, length, and surface finish according to project requirements.
Do you provide third-party inspection certificates?
Yes. SGS, BV, TUV, and other third-party inspection reports are available upon request.
What surface finishes are available?
Available finishes include:
Pickled
Bright annealed
Polished
Industrial finish
Can you supply CNC machined nickel alloy pipe components?
Yes. Our factory supports CNC cutting, beveling, threading, precision machining, and fabricated alloy pipe components.
How can I get a quotation quickly?
Please send:
Material grade
Pipe dimensions
Quantity
Application environment
Technical requirements
Our team will provide a fast professional quotation.
Contact Us
Xi'an Dongmeng Group Co., Ltd
Professional Supplier of ASTM B535 NiFeCrSi Alloy Seamless Pipe
Phone / WhatsApp / WeChat: +8615769214734
Email: office@dongmjd.com
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