35CrMo Alloy Steel Grade 10.9 Dacromet Hex Bolt
Product Overview
Grade 10.9 Dacromet hex bolts are high-strength fasteners engineered for demanding applications that require both exceptional mechanical performance and outstanding corrosion resistance. Manufactured from 35CrMo alloy steel and coated with Dacromet, these bolts are ideal for use in harsh environments such as automotive chassis, infrastructure projects, wind power assemblies, and marine structures. The Dacromet finish ensures extended service life, especially in salt spray or corrosive chemical conditions.
Product Specification Table
| Specification | Detail |
|---|---|
| Product Name | Grade 10.9 Dacromet Hex Bolt |
| Material | 35CrMo Alloy Steel |
| Strength Grade | Grade 10.9 |
| Thread Type | Metric / UNC |
| Surface Coating | Dacromet (Zinc-Aluminum Flake Coating) |
| Standards | ISO 4014 /ISO4017 / DIN 933 / ANSI B18.2.1 |
| Size Range | M6–M30, 1/4″–1-1/4″ |
| Length Range | 12mm–300mm |
Technical Parameters
| Mechanical Property | Value |
|---|---|
| Tensile Strength | ≥1040 MPa |
| Yield Strength | ≥940 MPa |
| Hardness | 32–39 HRC |
| Salt Spray Resistance | ≥1000 hours |
| Proof Load | 90% of minimum tensile strength |
| Operating Temperature | -40°C to 300°C |
Material & Manufacturing Process
35CrMo alloy steel provides excellent mechanical properties including high tensile strength, wear resistance, and fatigue durability. The material is widely used for fasteners subjected to dynamic or high-load conditions.
Production Process:
Raw material selection and testing
Cold or hot forging depending on bolt size
Thread forming (rolling or CNC machining)
Heat treatment (quenching and tempering)
Dacromet coating application
Dimensional and mechanical property inspection
The Dacromet coating offers superior corrosion resistance without hydrogen embrittlement, making it suitable for critical environments where traditional plating methods fall short.
Typical Applications & Industries
Grade 10.9 Dacromet hex bolts are commonly used in:
Automotive chassis, suspensions, and engine systems
Offshore and marine engineering components
Wind turbine base structures and energy equipment
Construction steel structures, towers, and bridges
Agricultural and forestry machinery exposed to weather
Product Advantages & Competitive Features
Corrosion-Resistant Grade 10.9 Hex Bolts for Harsh Environments
Flybear Fastener delivers hex bolts that outperform typical coated fasteners with the combination of 35CrMo steel and Dacromet surface technology.
Premium Material Selection: 35CrMo alloy provides excellent mechanical strength and fatigue resistance
Advanced Surface Finish: Dacromet coating ensures 1000+ hours of salt spray resistance without cracking or peeling
Accurate Thread Control: Precision-rolled or cut threads for perfect engagement
Tailored Specifications: Custom production available for length, thread pitch, or head type
Rapid Delivery: In-stock items and bulk supply capabilities
After-Sales Technical Support: Timely response for application consulting and performance optimization
Company Quality Inspection & Control
All fasteners from Flybear Fastener are subjected to strict internal quality control protocols:
Raw material traceability and mechanical property verification
Surface coating thickness and salt spray resistance checks
Dimensional inspection with GO/NO-GO gauges
Conformity with ISO 898-1 and Dacromet technical standards
Batch testing and certification documentation available upon request
Selection & Procurement Guide
When selecting Grade 10.9 Dacromet hex bolts, customers should consider:
Load capacity and grade requirements for the application
Corrosion exposure—especially for outdoor, marine, or coastal use
Bolt length and thread configuration needed for assembly
Compatibility with other Dacromet-coated parts to avoid galvanic corrosion
For custom applications, project tenders, or OEM parts, feel free to provide detailed specs or drawings. We offer design support and logistics coordination for global shipping.
Conclusion & Company Promotion
We always uphold the philosophy of “quality first, customer foremost,” and are committed to providing customers with high-quality fastener products and one-stop fastening solutions.
Browse more corrosion-resistant fasteners or contact us to request samples, technical data sheets, or quotes tailored to your industry needs.
Follow Me!
