17-4PH SS 12.9S Hex Bolt for Steel Structures
The 17-4PH SS 12.9S hex bolt for steel structures is a high-performance fastener designed for applications demanding both superior strength and exceptional corrosion resistance. Offering excellent mechanical properties, these hex bolts are widely used in critical structural assemblies in construction and heavy industries. Manufactured to the highest international standards, they ensure structural integrity and long-term reliability under extreme environments.
Product Overview
The 17-4PH SS 12.9S hex bolt is produced using high-grade 17-4 precipitation-hardened stainless steel combined with 12.9S high-strength classification, making it ideal for steel structure applications where durability, strength, and corrosion resistance are essential. These hex bolts offer excellent tensile strength and yield strength, ensuring secure connection points in load-bearing applications.
These fasteners are designed to withstand high-stress environments such as infrastructure, bridges, skyscrapers, industrial plants, and marine constructions. Their hexagonal head shape provides ease of installation and secure tightening using standard tools, ensuring reliability in complex engineering systems.
Product Specifications
| Specification | Details |
|---|---|
| Product Name | 17-4PH SS 12.9S Hex Bolt |
| Grade | 12.9S High Strength |
| Material | 17-4PH Stainless Steel |
| Head Type | Hexagonal (Hex) |
| Thread Type | Fully or Partially Threaded |
| Finish | MoS₂ |
| Size Range | M6 – M36 |
| Standard Compliance | ASME B 18.2.6, GB1231, DIN7990 |
Technical Parameters
| Property | Value |
|---|---|
| Tensile Strength | ≥ 1,200 MPa |
| Yield Strength | Range between 1,100–1,200 MPa |
| Hardness | 35 – 45 HRC |
| Operating Temperature | Up to 600°C (continuous) |
| Corrosion Resistance | Excellent in marine & industrial environments |
Material Introduction and Production Process
The 17-4PH SS (also known as UNS S17400 or Grade 630) is a chromium-nickel-copper precipitation-hardened stainless steel with excellent mechanical properties. Its unique composition allows it to achieve a high-strength 12.9S grade after heat treatment without sacrificing its corrosion resistance.
Manufacturing Process:
- Raw Material Sourcing – Procurement of certified 17-4PH stainless steel.
- Forging – Forming the hex head using hot or cold forging methods.
- Threading – Precision threading via CNC equipment.
- Heat Treatment – Precipitation hardening to achieve 12.9S strength properties.
- Surface Finish – Cleaning, passivation or customer-specified coatings.
- Final Inspection – Dimensional and mechanical compliance verification.
Common Industries and Use Cases
- Steel Structure Fabrication
- Offshore Marine Platforms
- Construction of Bridges and Tunnels
- High-Rise and Commercial Buildings
- Wind Turbine Foundations
- Mining Equipment Assembly
- Aerospace Ground Support
- Transportation Infrastructure Projects
These industries prefer the 17-4PH SS 12.9S hex bolt for its combination of mechanical and climatic performance. Particularly, marine and coastal installations benefit from its rust and salt-resistance properties.
Product Advantages and Competitive Edge
Our 17-4PH SS 12.9S hex bolts boast several performance and logistical advantages:
- Premium Materials: High-grade 17-4PH stainless steel ensures heat resistance and structural endurance.
- Precision Engineering: Tight thread tolerances ensure a proper fit and optimal load distribution.
- Advanced Surface Coating: Superior rust-resistance and anti-corrosion capacity.
- Customization Ready: Tailored dimensions and coatings available upon request.
- Full Inventory Support: Rapid delivery from stocked standard sizes.
- Responsive Support: Trouble-free technical support and professional after-sales care.
Quality Control and Testing
At Flybear Fastener, we prioritize quality assurance throughout the production cycle. All bolts undergo:
- Raw material verification through spectrometric analysis
- Dimensional inspections using precision gauges
- Mechanical testing for tensile and yield strength
- Salt spray and corrosion resistance testing
- Thread integrity checks using standard thread gauges
Our ISO-certified quality management system ensures consistent compliance with global standards.
Choosing and Purchasing Guide
When selecting the right 17-4PH SS 12.9S hex bolt, consider the following:
- Identify your structural load and stress needs
- Confirm corrosion exposure level and temperature conditions
- Consult design drawings and technical requirements
- Choose appropriate dimensions (M, pitch, and thread length)
- Prefer certified suppliers with documented materials and test reports
We recommend contacting our technical team for choosing the best configuration for your project. OEM and special material customization are welcome.
Summary and Company Promotion
Backed by years of experience and continuous innovation, Flybear Fastener takes pride in delivering world-class fastening solutions. Our 17-4PH SS 12.9S hex bolts are trusted by engineers and construction managers worldwide due to their performance, durability, and adaptability.
We always adhere to the philosophy of “Quality First, Customer Supreme,” and are committed to bringing clients high-quality fastener products and a one-stop fastener solution for diverse industrial needs.
Explore our full catalog, or contact us today to get custom configurations, technical drawings, and pricing tailored to your application.
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