Alloy ASTM A193 Grade B8 Class 2 Studs and Bolts

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Alloy ASTM A193 Grade B8 Class 2 Studs and Bolts

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Alloy ASTM A193 Grade B8 Class 2 Studs and Bolts Specification

Product Form
Studs, Threaded Rods, Hex Bolts

Material Composition %
Cr 18-20%, Ni 8-12%, C 0.08%, Mn 2%, Si 1%, P 0.045%, S 0.03%

Diameter
Standard range 1/4 to 2-1/2 (custom diameters available)

Size
Available in custom sizes as per specification

Heat Resistance
Yes

Coating Type
Uncoated/Passivated

Recyclable
Yes, 100% recyclable material

Tensile Strength
>=760 MPa (minimum)

Hardness
35 HRC (Maximum)

Corrosion Resistant
Yes, excellent corrosion resistance

Product Name
ASTM A193 Grade B8 Class 2 Studs and Bolts

Steel Type
Alloy Steel (Austenitic Stainless Steel)

Steel Product Type
Fasteners - Studs and Bolts

Grade
ASTM A193 Grade B8 Class 2

Thickness
Not applicable (determined by diameter and thread length)

Shape
Cylindrical (Studs and Hex/Bolts)

Steel Standard
ASTM A193

Surface
Bright, Cleaned, or Passivated Finish

Composition
AISI 304 stainless steel, solution treated, strain hardened

Application
High-temperature and high-pressure applications, petrochemical, chemical processing, oil & gas industries, power plants, pipelines, valves, and flanges

Dimension (L*W*H)
Varies as per requirement, standard lengths available from 1/2 to 72

Weight
Varies depending on size and dimension

Color
Silver / Metallic

Material Grade
Grade B8 Class 2

Finish Type
Passivated, Cleaned, Plain

Usage
Securing and joining mechanical components under high stress and temperature conditions

Yield Strength
600 MPa (minimum)

Stock Availability
Ready Stock Available

Manufacturing Process
Cold drawn and strain hardened

Standards Compliance
Conforms to ASTM, ASME, and other international standards

Thread Type
UNC/UNF threads, metric threads available as required

Packaging Type
Bulk packing, export-worthy wooden boxes or as specified

Rust Proof
Yes, resistant to atmospheric corrosion

Magnetism
Non-magnetic in annealed condition

Temperature Range
Service temperature -196C to +593C

Proof Load
660 MPa (minimum)

Elongation
>=15% (in 50 mm)

About Alloy ASTM A193 Grade B8 Class 2 Studs and Bolts

Grade B7 is a heat-treated chromium-molybdenum (Cr-Mo) alloy steel with minimum tensile strength requirement of 125 ksi, yield 105 ksi, and maximum hardness of 35HRC. Boltport uses Alloy Steel AISI 4140 bar stock or forging stock to produce B7 headed and non-headed bolts.

High-Performance Fastening Solutions

ASTM A193 Grade B8 Class 2 Studs and Bolts are specifically designed to handle demanding environments where high strength and exceptional corrosion resistance are essential. These fasteners are widely used in petrochemical plants, power stations, pipelines, and more, ensuring reliable performance even at extreme temperatures ranging from -196C up to 593C.

Stringent Quality and International Compliance

Manufactured through cold drawing and strain hardening processes, our studs and bolts conform to ASTM, ASME, and other global standards. Each product undergoes rigorous testing to ensure compliance with specified chemical composition, mechanical properties, and surface quality standards, making them trusted components in critical systems worldwide.

Flexible Sizing and Quick Availability

Standard lengths of 1/2 inch to 72 inches and diameters from 1/4 to 2-1/2 inches, with custom dimensions available on request, allow for precise fitment in diverse mechanical assemblies. Large, ready stock and export-worthy packaging ensure timely delivery across India and global markets.

FAQ's of Alloy ASTM A193 Grade B8 Class 2 Studs and Bolts:

Q: How are ASTM A193 Grade B8 Class 2 Studs and Bolts processed for enhanced strength?

A: These studs and bolts undergo cold drawing followed by strain hardening. This process refines the microstructure, increasing their yield and tensile strength to meet demanding mechanical requirements for high-stress applications.

Q: What types of threads are available for these fasteners?

A: Both UNC/UNF (Unified National Coarse/Fine) and metric threads are offered, and custom thread types or pitches can be provided according to project specifications, ensuring compatibility with global and regional standards.

Q: When should I select ASTM A193 Grade B8 Class 2 Studs and Bolts for my project?

A: These fasteners are ideal selections when your application involves high temperatures (up to 593C), high pressures, or corrosive environments, such as those found in chemical processing plants, oil & gas facilities, power plants, and critical pipeline systems.

Q: Where can these studs and bolts be used effectively?

A: They are suitable for high-performance mounting and joining in valves, flanges, pressure vessels, pipelines, and other heavy-duty industrial assemblies that demand both corrosion resistance and mechanical durability.

Q: What are the main benefits of using this grade of fastener?

A: ASTM A193 Grade B8 Class 2 fasteners offer high mechanical strength, non-magnetic behavior in annealed condition, superior corrosion and heat resistance, along with 100% recyclability. These traits provide reliable, long-term performance under extreme industrial conditions.

Q: How does the rust and corrosion resistance of these fasteners compare to other grades?

A: These studs and bolts, made from AISI 304 stainless steel and solution treated, exhibit excellent rust and corrosion resistance, outperforming standard carbon steel fasteners, and are also resistant to atmospheric and most chemical exposures.

Q: What is the standard packaging for these fasteners?

A: Products are available in bulk packaging or export-worthy wooden boxes. Custom packaging can also be arranged as per client specifications, ensuring safe transportation and handling during domestic or international shipment.

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