Niobium R04210 Fasteners are commercially pure niobium fasteners identified by UNS R04210 and commonly specified to ASTM B392 requirements for wrought niobium products. They are selected for their high ductility, corrosion resistance and suitability for specialized chemical-processing and high-temperature applications. We supply Niobium R04210 bolts, screws, studs, nuts, washers and custom fasteners in different sizes, thread configurations and finishes for industrial requirements.

Niobium R04210 is particularly useful where material ductility, resistance to aggressive chemical environments and reliable fabricated fastening are important. Depending on the application, fasteners can be supplied as socket head cap screws, flat washers, threaded rods, stud bolts and other non-standard configurations.

What Are Niobium R04210 Fasteners?

Niobium R04210 Fasteners are manufactured from commercially pure niobium and are designated under the UNS R04210 material identification system. Niobium is a refractory metal known for its high melting point, ductility and resistance to many corrosive environments.

These fasteners are intended for applications where conventional stainless steel or carbon steel fastening materials may not provide the required combination of corrosion resistance and material performance.

The R04210 grade is associated with high ductility, making it suitable for forming and fabrication into different fastener geometries. Depending on the design, we can supply precision-machined components for applications involving specialized equipment, chemical processing systems and other demanding industrial environments.

Niobium R04210 Fasteners Specifications

Property Details
ProductNiobium R04210 Fasteners
MaterialCommercially Pure Niobium
UNS DesignationR04210
StandardASTM B392
Product FormsBolts, Screws, Studs, Nuts, Washers, Threaded Rods
Screw TypeSocket Head Cap Screws
Washer TypeFlat Washers
ManufacturingMachined / Cold Worked / Fabricated as applicable
ThreadsMetric / UNC / UNF / Custom
SizeAs per drawing or customer requirement
FinishAs manufactured / Custom
ApplicationChemical, process, high-temperature and specialized equipment

Types of Niobium R04210 Fasteners We Supply

We manufacture and supply different fastening configurations according to application requirements.

➤ Niobium R04210 Bolts

R04210 niobium bolts are available in hex-head and other customized configurations. They can be produced for equipment assembly where resistance to corrosive environments is important.

➤ Niobium R04210 Socket Head Cap Screws

Niobium R04210 Socket Head Cap Screws feature a recessed hexagonal drive and compact head design. They are useful for assemblies where installation space is limited or a flush, compact fastening arrangement is preferred.

➤ Niobium R04210 Stud Bolts

Stud bolts provide threaded engagement at both ends and are commonly used with nuts for equipment flanges and specialized assemblies.

➤ Niobium R04210 Flat Washers

Niobium R04210 Flat Washers distribute the applied fastening load across the surface around a bolt or screw hole. They can be supplied in standard or customized dimensions.

➤ Niobium R04210 Nuts

Matching nuts can be manufactured or supplied for compatible niobium fastening assemblies.

➤ Niobium R04210 Threaded Rods

Threaded rods can be supplied in specified lengths and thread configurations for custom fabrication and equipment assembly.

➤ Custom Niobium Fasteners

For specialized projects, we can manufacture non-standard dimensions, head styles, thread configurations and component geometries according to customer drawings.

Chemical Composition of Niobium R04210

Element R04210 Maximum, wt.%
Carbon (C)0.010
Nitrogen (N)0.010
Oxygen (O)0.025
Hydrogen (H)0.0015
Zirconium (Zr)0.020
Tantalum (Ta)0.300
Iron (Fe)0.010
Silicon (Si)0.005
Tungsten (W)0.050
Nickel (Ni)0.005
Molybdenum (Mo)0.020
Hafnium (Hf)0.020
Titanium (Ti)0.030
Niobium (Nb)Balance

Mechanical Properties of Niobium R04210

Mechanical Property R04210
ConditionAnnealed
Ultimate Tensile Strength, min.125 MPa
Yield Strength, min.73 MPa
Elongation, typical/min. by applicable product requirement20–25%*
Elastic Modulus, typical~103 GPa
Density~8.57 g/cm³
Poisson's Ratio, typical~0.4

Niobium R04210 Fasteners Weight Chart

Product Size Example Approx. Weight Basis
Socket Head Cap ScrewM6 × 20Calculated from geometry
Socket Head Cap ScrewM8 × 30Calculated from geometry
Socket Head Cap ScrewM10 × 40Calculated from geometry
Hex BoltM12 × 50Calculated from geometry
Stud BoltM16 × 100Calculated from geometry
Flat WasherM10Calculated from OD/ID/thickness
Flat WasherM12Calculated from OD/ID/thickness
Threaded RodM10 × 1000Calculated from thread diameter and length

Equivalent Grades of Niobium R04210

Standard / System Equivalent or Related Designation
UNSR04210
ASTM B392Type 2
ASTM Material DescriptionCommercial Grade Unalloyed Niobium
Chemical SymbolNb
ElementNiobium / Columbium
W.Nr. / ENNo direct universally accepted one-to-one equivalent
R04200Related grade, but Type 1 reactor-grade unalloyed niobium
R04251Related grade, but niobium-1% zirconium
R04261Related grade, but commercial niobium-1% zirconium

Why Choose High Ductility Niobium UNS R04210 Fasteners?

The key reason for selecting High Ductility Niobium UNS R04210 Fasteners is the material's combination of ductility and corrosion-resistant characteristics.

  • High Ductility: Niobium is a highly ductile refractory metal. This characteristic supports fabrication into different shapes and specialized fastener geometries.
  • Corrosion Resistance: Niobium has strong resistance to corrosion in many chemical environments because of its stable protective oxide layer.
  • High-Temperature Capability: Niobium has a very high melting point and retains its importance in specialized high-temperature material applications.
  • Specialized Chemical-Service Performance: R04210 fasteners can be considered for chemical-processing equipment and environments where compatibility with aggressive media is a major material-selection factor.
  • Custom Manufacturing: We can supply fasteners in different dimensions, thread standards and configurations based on drawings, specifications and application requirements.

Applications of Niobium R04210 Fasteners

Niobium fasteners are used in specialized industries where material compatibility is more important than the cost advantages offered by conventional fastener materials.

Common application areas include:

  • Chemical processing equipment
  • Corrosive-service assemblies
  • Specialized heat-treatment equipment
  • High-temperature industrial systems
  • Process equipment
  • Laboratory and research equipment
  • Specialized fabrication
  • Pharmaceutical and chemical equipment
  • Refractory-metal assemblies
  • Custom engineering applications

Actual suitability should always be evaluated against the operating temperature, chemical environment, mechanical loading, joining method and applicable engineering specification.

Niobium R04210 Fasteners Supplier in India

As a Niobium R04210 Fasteners Supplier, we support industrial buyers requiring specialized refractory-metal fastening products. Our supply range includes bolts, studs, screws, socket head cap screws, nuts, flat washers and custom-machined fasteners.

We focus on matching the supplied product with the required UNS designation, ASTM specification, dimensions, thread form and application requirements.

For custom orders, buyers can share drawings, dimensional specifications, material requirements and quantity so that the appropriate manufacturing route can be determined.

Niobium R04210 Fasteners Exporter to UAE

We supply Niobium R04210 Fasteners for export to the UAE and other international markets. Export orders can be prepared according to project specifications, packing requirements and agreed documentation.

Our Niobium R04210 Fasteners Exporter to UAE service is suitable for distributors, engineering companies, process-equipment manufacturers, contractors and industrial procurement teams requiring specialized niobium fastening components.

International orders can include relevant material documentation and inspection requirements according to the purchase order.

Manufacturing of Niobium R04210 Fasteners

manufacturing-of-niobium-r04210-fasteners

Ordering Niobium R04210 Fasteners

When requesting a quotation, provide the UNS R04210 designation, ASTM specification, fastener type, size, thread standard, quantity and delivery destination.

For custom products, technical drawings or dimensional specifications can help us determine the required manufacturing details.

Whether you require Niobium R04210 Socket Head Cap Screws, Niobium R04210 Flat Washers, bolts, studs or custom fasteners, we can discuss the required configuration and supply requirements.

Contact us with your drawings or specifications to enquire about Niobium R04210 Fasteners, pricing, availability and export requirements.

FAQs – Niobium R04210 Fasteners

Niobium R04210 Fasteners are specialized fastening components manufactured from UNS R04210 Type 2 commercial-grade unalloyed niobium. The material can be supplied to the applicable requirements of ASTM B392.
The UNS designation is R04210 for Type 2 commercial-grade unalloyed niobium under ASTM B392.
ASTM B392 is the specification for wrought niobium and niobium-alloy bar, rod and wire. Its current edition identifies R04210 as Type 2 commercial-grade unalloyed niobium.
No. ASTM B392 is primarily a material/product-form specification for niobium and niobium-alloy bar, rod and wire. Finished fastener dimensions and configurations should be specified separately.
We supply bolts, stud bolts, socket head cap screws, threaded rods, nuts, flat washers and custom-machined fasteners according to requirements.
They are compact-head screws with an internal hexagonal drive manufactured from R04210 niobium material. They are useful for specialized assemblies where compact fastening is required.
Yes. Niobium R04210 Flat Washers can be supplied in specified inside diameter, outside diameter and thickness, including custom dimensions.
For applicable ASTM B392 Types 1 and 2 annealed rod requirements, the minimum ultimate tensile strength is 18,000 psi (125 MPa). The applicable yield and elongation requirements depend on the product form and dimensions.
No. ASTM B392 identifies R04200 as Type 1 reactor-grade unalloyed niobium and R04210 as Type 2 commercial-grade unalloyed niobium. They should not be treated as automatically interchangeable.
Yes. We supply Niobium R04210 Fasteners for export to UAE and can discuss dimensions, quantities, documentation and packaging requirements for international orders.
Yes. Custom dimensions, thread configurations, head styles, lengths and washer dimensions can be produced according to the applicable drawing and agreed material specification.

Our Products


Drop us a line

We respects customer privacy and ensures absolute confidentiality of any information that is given to us.

We respect your privacy.