1.4718 X45CrSi9-3 Valve Steel – Premium HNV3 SUH1 Solution
High-Performance Martensitic Valve Steel for Internal Combustion Engines by FUSHUN SPECIAL STEEL
Steel Grade Introduction and Applications
FUSHUN SPECIAL STEEL proudly presents 1.4718 (X45CrSi9-3), a premium martensitic valve steel also known as HNV3 and SUH1, specifically engineered for demanding internal combustion engine applications. This high-performance steel grade fully complies with EN 10090:1998 standards for valve steels and alloys, making it the preferred choice for automotive and industrial engine manufacturers globally.
As a leading manufacturer, FUSHUN SPECIAL STEEL specializes in producing 1.4718 HNV3 SUH1 valve steel for critical engine valve applications. Our manufacturing capabilities ensure exceptional heat resistance, oxidation resistance, and superior mechanical strength required for high-temperature engine environments. We welcome large-volume orders from automotive manufacturers and engine component suppliers worldwide.
Key Applications: Exhaust valves, intake valves, valve guides, valve seats, and other high-temperature engine components requiring superior corrosion resistance and mechanical performance in automotive and industrial engines.
Chemical Composition – EN 10090:1998
| Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Nickel (Ni) |
|---|---|---|---|---|
| Content (%) | 0.4 – 0.5 | 2.7 – 3.3 | max 0.6 | max 0.5 |
| Element | Phosphorus (P) | Sulfur (S) | Chromium (Cr) |
|---|---|---|---|
| Content (%) | max 0.04 | max 0.03 | 8 – 10 |
Optimized composition ensures excellent high-temperature performance and oxidation resistance
Available Processing Types
Hot Rolled
Premium hot rolled 1.4718 valve steel with exceptional dimensional accuracy and superior mechanical properties, manufactured using advanced rolling technology for consistent automotive grade quality.
Hot Forged
Precision hot forged components with optimized grain structure and enhanced mechanical performance, ideal for critical valve applications requiring maximum strength, durability and high-temperature resistance.
FUSHUN SPECIAL STEEL – Your trusted manufacturer for automotive valve steel with large-volume production capabilities.
Available Shapes for Valve Manufacturing
Round Bars
Precision round bars for valve stem machining and high-performance component manufacturing
Flat Bars
High-quality flat bars for valve head manufacturing and specialized engine components
Plates
Heavy plates for valve seat manufacturing and large automotive component production
Wire
Precision wire products for specialized valve components and engine applications
Available Sizes and Custom Manufacturing Solutions
Standard Inventory Sizes
FUSHUN SPECIAL STEEL maintains comprehensive inventory of standard valve steel sizes for immediate delivery to automotive manufacturers. Our extensive stock includes common dimensions for all product shapes, ensuring rapid response to urgent automotive production requirements and just-in-time delivery schedules.
Request our detailed stock list and competitive pricing for bulk automotive orders. As a dedicated manufacturer serving the global automotive industry, we specialize in large-volume supply agreements and can provide comprehensive quotations for annual valve steel requirements.
Custom Size Manufacturing Capabilities
Beyond standard dimensions, FUSHUN SPECIAL STEEL offers comprehensive custom manufacturing services for specialized valve applications. Our state-of-the-art production facilities can accommodate unique specifications and dimensional requirements for automotive OEMs and Tier 1 suppliers.
Consult our automotive engineering team for custom production capabilities and lead times. We excel in large-scale automotive manufacturing projects and provide complete technical support for your HNV3 SUH1 valve steel requirements.
Mechanical Properties (Heat Treated Conditions)
| Property | Value | Unit | Condition |
|---|---|---|---|
| Tensile Strength (Rm) | 900-1100 | MPa | +QT |
| 0.2% Proof Strength (Rp0.2) | 700 | MPa | +QT |
| Min. Elongation at Fracture (A) | 14 | % | +QT |
| Nominal Thickness Range | to 40 | mm | +QT |
| Reduction in Cross Section (Z) | 40 | % | +QT |
| Brinell Hardness (HB) | 266-325 | HB | +QT |
| Brinell Hardness (HB) | 300 | HB | +A |
Heat Treatment Codes: +QT = Quenched and Tempered, +A = Annealed
Note: Optimal mechanical properties achieved through precise heat treatment ensure maximum valve performance and extended service life in engine applications.
Heat Treatment Specifications for Valve Applications
Quenching and Tempering (+QT)
Optimal heat treatment for valve applications requiring maximum strength, toughness, and high-temperature performance. Our precisely controlled quenching and tempering process ensures consistent mechanical properties and valve reliability.
Achieves: 900-1100 MPa tensile strength with excellent ductility and high-temperature stability
Annealing (+A)
Stress relief annealing for improved machinability and dimensional stability during valve manufacturing processes, ensuring optimal machining characteristics.
Achieves: 300 HB hardness for superior machining characteristics and surface finish
International Equivalent Grades
| EU/EN Standard | China/GB Standard | Russia/GOST Standard |
|---|---|---|
| X45CrSi9-3 | 4Cr9Si2 4Cr9Si8 | 40KH9S2 |
Note: Equivalent grades shown for reference only. FUSHUN SPECIAL STEEL produces to exact EN 10090:1998 specifications ensuring global automotive industry compliance.
FUSHUN SPECIAL STEEL Manufacturing Excellence
Advanced Smelting Technology
State-of-the-art ESR (Electroslag Remelting), VIM (Vacuum Induction Melting), and VAR (Vacuum Arc Remelting) technologies ensure ultra-clean steel with superior valve performance characteristics and extended service life.
Precision Heat Treatment
In-house controlled atmosphere heat treatment facilities with precise temperature control ensure consistent valve steel properties, optimal microstructure, and reliable performance in demanding engine environments.
Automotive Industry Expertise
Specialized knowledge in automotive valve steel requirements with rapid delivery capabilities, quality assurance programs, and technical support designed specifically for high-volume automotive production environments.
Complete Processing Services
Comprehensive machining and surface finishing services reduce downstream processing time and costs, delivering ready-to-use valve steel components with precise dimensions to automotive manufacturers.
Global Automotive Manufacturing Partner
FUSHUN SPECIAL STEEL is your premier manufacturer for 1.4718 X45CrSi9-3 HNV3 SUH1 valve steel. We specialize in large-volume automotive production with stringent quality control, reliable supply chain management, and global delivery capabilities.
Partner with us for your automotive valve steel requirements – contact our global automotive division today.
Physical Properties
| Property | Value | Unit |
|---|---|---|
| Density | 7.7 | g/cm³ |
Optimal density providing excellent strength-to-weight ratio for automotive valve applications
Ready to Partner? Contact FUSHUN SPECIAL STEEL
Join leading automotive manufacturers worldwide who trust FUSHUN SPECIAL STEEL for their 1.4718 HNV3 SUH1 valve steel requirements. As your dedicated manufacturer, we provide comprehensive support for large-scale automotive valve production projects.
Contact our automotive valve steel division today for technical consultation and competitive bulk pricing.
