Grade B7 Hex Bolt

Premium Grade B7 Hex Bolts for High-Temperature Industrial Applications

Trusted Manufacturer of ASTM/ASME-Compliant Fasteners

At Xi’an QinSteel, we engineer Grade B7 Hex Bolts that excel in extreme conditions. Designed for refinery, pipeline, and energy infrastructure projects, our bolts combine chromium-molybdenum alloy strength with precision manufacturing. With GMP-certified production, global certifications, and same-day dispatch capabilities, we ensure reliability where it matters most.

What Are Grade B7 Hex Bolts?

The products are high-strength fasteners made from heat-treated chromium-molybdenum steel (ASTM A193 B7). These bolts withstand temperatures up to 450°C (842°F) and pressures exceeding 10,000 PSI, making them ideal for:

• Oil refinery flange connections
• High-pressure gas pipelines
• Power plant turbine assemblies
• Offshore drilling equipment

Certified to ASTM A193/A320 and ASME B18.2.1 standards, they offer unmatched tensile strength (125 ksi minimum) and stress corrosion resistance.

Key Specifications

Why Our B7 Hex Bolts Outperform?

1. Engineered for Extreme Environments

Our bolts undergo specialized heat treatment to resist thermal creep and cyclic stress in hydrocarbon processing systems.

2. Global Compliance Ready

Pre-certified with ISO 9001, ASTM A193, and ASME B18.2.1 – accepted in North America, Europe, and APAC regions.

3. Rapid Customization

Need non-standard lengths or NACE MR0175-compliant coatings? Our OEM team delivers prototypes in 7–10 days.

4. Zero Inventory Delays

1,200+ metric tons of Grade B7 Hex Bolts in stock, with 15-day shipping to EU/US warehouses.

5. Unmatched Traceability

Blockchain-powered batch tracking and digital Material Test Reports (MTRs) included with every order.

Critical Applications

• Flange Bolting: Secure high-pressure valve connections in refineries
• Structural Fastening: Reinforce offshore drilling platforms
• Pressure Vessels: Maintain seal integrity in chemical processing units
• Turbine Assembly: Withstand thermal cycling in power generation systems

Built for Your Industry Challenges

Solve Supply Chain Risks

• Dual Continental Warehouses: Reduce transit times by 60%
• Emergency Stock Reserves: 5,000–20,000 units available for urgent outages

Eliminate Certification Hurdles

• Pre-tested for PED (EU), API 20E (North America), and NACE MR0175 (sour gas)
• Full DNV-GL/ABS documentation for offshore projects

Quality Assurance Protocol

1. Material Verification: Spectrometer testing for alloy composition

2. Dimensional Checks: Laser measurement (±0.01mm tolerance)

3. Performance Testing: 100% hardness, tensile, and Charpy impact tests

4. Coating Analysis: Salt spray tests per ASTM B117

Quality Control

Factory Equipment

Shipping Packaging

FAQs

Q: Can you match legacy bolt specs for older equipment?

A: Yes! Share drawings or samples – we replicate non-standard threads/dimensions.

Q: How are bolts protected during shipping?

A: VCI anti-rust film + shock-absorbent crates ensure damage-free delivery.

Q: What’s the MOQ for customized orders?

A: 1,000 pieces (varies by size). Request a sample kit first.

Q: Do you provide on-site technical support?

A: Our engineers can assist with installation torque calculations and corrosion prevention.

Contact Us

Contact our Grade B7 Hex Bolt specialists:

📧 info@sxqinsteel.com

Include project specs, quantity, and certification needs for a same-day quote. Bulk order discounts available!