ASTM A193 B8M Class 2 Round Bar Supplier

Looking for ASTM A193 Grade B8M Class 2, 316 stainless steel fastener material or round bars for stud bolt manufacturing?

WTE PowerSteel is a European supplier and stockholder of ASTM A193 B8M Class 2 stainless steel round bars for manufacturing high-strength corrosion-resistant fasteners. We supply certified round bars with full material traceability, EN 10204 3.1 certification and fast worldwide delivery.

ASTM A193 Grade B8M Class 2 is a strain-hardened austenitic stainless steel bolting material based on AISI 316 / 316L. It combines excellent corrosion resistance with significantly higher mechanical strength than standard solution-annealed Class 1 material, making it ideal for critical bolting applications used in pressure vessels, valves, flanges and piping systems.

The material is widely used for manufacturing stud bolts, threaded rods, hex bolts and other corrosion-resistant fasteners operating in offshore, petrochemical, chemical processing and power generation industries. Its combination of high tensile strength and excellent corrosion resistance makes ASTM A193 B8M Class 2 one of the most widely specified stainless steel bolting materials for pressure equipment.

Why Choose ASTM A193 B8M Class 2?

Compared with standard ASTM A193 B8M Class 1, Class 2 offers significantly higher mechanical strength through strain hardening while maintaining the excellent corrosion resistance of molybdenum-alloyed 316 stainless steel. It is the preferred choice for highly loaded fasteners used in pressure equipment and aggressive industrial environments.

Key Benefits

• High tensile strength
• Excellent corrosion resistance
• Molybdenum-alloyed stainless steel
• Excellent chloride resistance
• Strain hardened for increased strength
• Suitable for pressure bolting
• Excellent fatigue resistance
• Long service life
• Ideal for stud bolt manufacturing
• Suitable for offshore and chemical industries

Typical Applications

ASTM A193 B8M Class 2 is commonly used for manufacturing:

• Stud bolts
• Threaded rods
• Hex bolts
• Anchor bolts
• Pressure vessel fasteners
• Valve bolting
• Flange bolting
• Heat exchanger fasteners
• Offshore fasteners
• Petrochemical fasteners
• Precision CNC machined components
• Corrosion-resistant fasteners

Industries Served

Our customers use ASTM A193 B8M Class 2 in:

• Oil & Gas
• Offshore
• Petrochemical
• Chemical Processing
• Power Generation
• Water Treatment
• Marine
• Industrial Equipment Manufacturing

Available Product Forms

We supply:

• Round Bars
• Peeled Bars
• Bright Bars
• Cold Drawn Bars
• Thread Rolling Bars (TRB)
• Cut-to-Length Pieces

Available diameters and lengths upon request.

Inspection & Certification

Material can be supplied with:

• ASTM A193 Grade B8M Class 2
• EN 10204 3.1 Inspection Certificate
• EN 10204 3.2
• PMI (Positive Material Identification)
• Ultrasonic Testing (UT)
• Customer-specific inspection requirements

International Designations

This material is also known as:

• ASTM A193 Grade B8M Class 2
• SA193 B8M Class 2
• ASTM A320 B8M Class 2
• AISI 316 (base material)
• AISI 316L (base material)
• 1.4401 (base material)
• 1.4404 (base material)

Frequently Asked Questions

What is ASTM A193 B8M Class 2?

ASTM A193 B8M Class 2 is a strain-hardened stainless steel bolting material based on AISI 316 / 316L. It is designed for high-pressure and corrosion-resistant fastening applications used in pressure vessels, valves, flanges and piping systems.

What is the difference between Class 1 and Class 2?

The main difference is the manufacturing condition. Class 1 is solution annealed, while Class 2 is solution annealed and strain hardened by cold working. This significantly increases tensile and yield strength while maintaining excellent corrosion resistance.

Is ASTM A193 B8M Class 2 equivalent to A4-80?

In many fastening applications, ASTM A193 B8M Class 2 provides mechanical properties comparable to A4-80 because both are based on strain-hardened molybdenum-alloyed austenitic stainless steels. However, they are specified according to different international standards, and the applicable project specification should always be followed.

Do you stock ASTM A193 B8M Class 2 round bars?

Yes. WTE PowerSteel supplies ASTM A193 B8M Class 2 round bars from European stock. Please contact our sales team for current stock availability, dimensions and delivery times.

Can you supply cut-to-length material?

Yes. We supply both full-length bars and precision cut-to-length pieces according to customer requirements.

Why Choose WTE PowerSteel?

WTE PowerSteel is a European supplier and stockholder of stainless steels, heat-resistant steels and nickel alloys for fastener manufacturers, pressure equipment, offshore, petrochemical and power generation industries. We supply ASTM A193 B8M Class 2 round bars with full material traceability, EN 10204 3.1 certification, fast quotations, Thread Rolling Bars (TRB), cut-to-length service and worldwide delivery.