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Stud Bolt B7 ANSI B1.13M
QS Fastener: Stud Bolt B7 ANSI B1.13M
Name: Stud Bolt B7 ANSI B1.13M
Standard: ANSI B1.13M
Length: 120mm
Size: M24
Application: Used in the Construction and Repair of Turbines, Gates and Other Dam Infrastructure
Finish: Hot Dip Galvanized
Class: 6G
Material: ASTM A193 B7
Standard: ANSI B1.13M
Length: 120mm
Size: M24
Application: Used in the Construction and Repair of Turbines, Gates and Other Dam Infrastructure
Finish: Hot Dip Galvanized
Class: 6G
Material: ASTM A193 B7
Quantity
Stud Bolt B7 ANSI B1.13M
Conforming to ANSI B1.13M standard with specifications of M24×120mm, the Stud Bolt B7 ANSI B1.13M is manufactured from high-strength alloy steel ASTM A193 B7 and hot-dip galvanized, combining exceptional tensile strength with superior corrosion resistance. Designed for critical structural connections in dam gates, hydro turbines, and high-pressure pipeline flanges, its zinc coating provides long-term rust protection, significantly reducing maintenance costs. This makes it an ideal choice for hydropower infrastructure and heavy equipment repair.
Conforming to ANSI B1.13M standard with specifications of M24×120mm, the Stud Bolt B7 ANSI B1.13M is manufactured from high-strength alloy steel ASTM A193 B7 and hot-dip galvanized, combining exceptional tensile strength with superior corrosion resistance. Designed for critical structural connections in dam gates, hydro turbines, and high-pressure pipeline flanges, its zinc coating provides long-term rust protection, significantly reducing maintenance costs. This makes it an ideal choice for hydropower infrastructure and heavy equipment repair.
Anti-Corrosion Technology of High-Strength Stud Bolt B7 ANSI B1.13M
The Stud Bolt B7 ANSI B1.13M features Hot-Dip Galvanizing surface treatment with strictly controlled zinc coating thickness ≥85μm (microns), complying with ISO 1461 and ASTM A153/A153M international standards. This ANSI B1.13M-compliant bolt is particularly suited for moderate corrosion environments like hydropower projects and marine installations, offering extended protection for flange connections.
The Stud Bolt B7 ANSI B1.13M features Hot-Dip Galvanizing surface treatment with strictly controlled zinc coating thickness ≥85μm (microns), complying with ISO 1461 and ASTM A153/A153M international standards. This ANSI B1.13M-compliant bolt is particularly suited for moderate corrosion environments like hydropower projects and marine installations, offering extended protection for flange connections.
Technical Principle & Advantages
The Stud Bolt B7 ANSI B1.13M undergoes immersion in 450°C molten zinc to form a metallurgically bonded zinc-iron alloy layer, featuring triple protection mechanisms:
1. Physical Barrier: 85μm zinc coating (≈610g/m²) isolates oxygen/moisture from ASTM A193 B7 steel substrate.
2. Cathodic Protection: Zinc's electrochemical potential (-0.76V) sacrifices itself to protect the base material.
3. Self-Healing: Zinc corrosion products (zinc hydroxycarbonate) fill micro-damages.
The Stud Bolt B7 ANSI B1.13M undergoes immersion in 450°C molten zinc to form a metallurgically bonded zinc-iron alloy layer, featuring triple protection mechanisms:
1. Physical Barrier: 85μm zinc coating (≈610g/m²) isolates oxygen/moisture from ASTM A193 B7 steel substrate.
2. Cathodic Protection: Zinc's electrochemical potential (-0.76V) sacrifices itself to protect the base material.
3. Self-Healing: Zinc corrosion products (zinc hydroxycarbonate) fill micro-damages.
Compared to standard electro-galvanized bolts, the Stud Bolt B7 ANSI B1.13M's hot-dip galvanizing extends service life by 3-5 times, achieving 20 years in C3 environments (verified per ISO 9224).
Performance Parameters & Testing
- Zinc Coating Thickness: Magnetic gauge measurement shows average ≥85μm (local ≥70μm), exceeding GB/T 13912-2000 requirements (≥50μm for threaded parts).
- Adhesion: Passed ISO 4520 hammer test and ASTM D3359 cross-cut test with zero peeling.
- Salt Spray Test: 720 hours without red rust per ASTM B117, outperforming standard galvanized bolts (120 hours).
- Zinc Coating Thickness: Magnetic gauge measurement shows average ≥85μm (local ≥70μm), exceeding GB/T 13912-2000 requirements (≥50μm for threaded parts).
- Adhesion: Passed ISO 4520 hammer test and ASTM D3359 cross-cut test with zero peeling.
- Salt Spray Test: 720 hours without red rust per ASTM B117, outperforming standard galvanized bolts (120 hours).
Application Scenarios & Maintenance
Ideal operating conditions for Stud Bolt B7 ANSI B1.13M:
- Freshwater (pH 6.5-8.5)
- Industrial atmosphere (SO₂ <50mg/m³)
- Temperature range: -30℃ to 150℃
Ideal operating conditions for Stud Bolt B7 ANSI B1.13M:
- Freshwater (pH 6.5-8.5)
- Industrial atmosphere (SO₂ <50mg/m³)
- Temperature range: -30℃ to 150℃
Precautions:
- Use epoxy coating in strong acid/alkali (pH <4 or >12) or seawater splash zones.
- Avoid direct contact with stainless steel (potential difference >0.5V).
- Use epoxy coating in strong acid/alkali (pH <4 or >12) or seawater splash zones.
- Avoid direct contact with stainless steel (potential difference >0.5V).
Maintenance Recommendations:
- Install with anti-friction washers
- Inspect zinc coating every 3 years
- Repair localized damage with Zinga patching compound
- Install with anti-friction washers
- Inspect zinc coating every 3 years
- Repair localized damage with Zinga patching compound
Conclusion
The Stud Bolt B7 ANSI B1.13M combines ASTM A193 B7's high strength (≥860MPa) with hot-dip galvanizing's corrosion resistance, making it a reliable choice for critical hydropower components like turbine gates and penstocks, while dramatically reducing lifecycle maintenance costs.
The Stud Bolt B7 ANSI B1.13M combines ASTM A193 B7's high strength (≥860MPa) with hot-dip galvanizing's corrosion resistance, making it a reliable choice for critical hydropower components like turbine gates and penstocks, while dramatically reducing lifecycle maintenance costs.
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