1.2731 X50NiCrWV13-13 SUH31 Valve Steel & Tool Steel – Premium Hot Work Solution
High-Performance Austenitic Valve Steel and Hot Work Tool Steel with Tungsten-Vanadium by FUSHUN SPECIAL STEEL
1.2731 SUH31 Advanced Valve Steel & Tool Steel Introduction
FUSHUN SPECIAL STEEL presents 1.2731 (X50NiCrWV13-13, SUH31), a premium austenitic valve steel and hot work tool steel specifically engineered for demanding high-temperature applications. This advanced grade combines exceptional valve performance with superior tool steel characteristics, incorporating tungsten and vanadium for enhanced strength and wear resistance.
As a leading manufacturer of 1.2731 SUH31 valve steel and tool steel, FUSHUN SPECIAL STEEL specializes in producing high-quality austenitic grades with optimized tungsten-vanadium content. Our 1.2731 SUH31 steel delivers exceptional performance in valve applications, extrusion dies, and hot forming tools where traditional steels may fail under extreme conditions.
Key Applications: High-temperature valves (SUH31 grade), extrusion dies for copper and copper alloys, hot forming tools, forged valve components, and specialized valve steel applications requiring superior thermal stability and wear resistance.
Grade Equivalents and Designations
| DIN Standard | Material Number | JIS Standard | Classification |
|---|---|---|---|
| X50NiCrWV13-13 | 1.2731 | SUH31 | Austenitic Hot Work Steel |
International Recognition: 1.2731 is internationally recognized as SUH31 in Japanese standards, ensuring global compatibility and acceptance in valve and tool manufacturing industries worldwide.
1.2731 SUH31 Chemical Composition (Weight %)
| Carbon (C) | Silicon (Si) | Manganese (Mn) | Chromium (Cr) | Molybdenum (Mo) |
|---|---|---|---|---|
| 0.50 | 1.35 | 0.70 | 13.00 | – |
| Nickel (Ni) | Vanadium (V) | Tungsten (W) | Others |
|---|---|---|---|
| 13.00 | 0.65 | 2.15 | – |
SUH31 Enhanced Composition for Valve Applications: Balanced chromium-nickel content (13.00% each) provides excellent corrosion resistance for valve environments, while tungsten (2.15%) and vanadium (0.65%) enhance high-temperature strength and wear resistance, meeting SUH31 specifications.
1.2731 SUH31 Physical Properties for Valve & Tool Applications
| Property | Value | Unit | Condition |
|---|---|---|---|
| Modulus of Elasticity | 210 | GPa | Ambient |
| Density | 8.00 | g/cm³ | Ambient |
| Service Hardness | 1000 | N/mm² | Ready for Use |
SUH31 Valve Performance Advantage: Service hardness of 1000 N/mm² provides exceptional wear resistance for valve components, while optimal density ensures reliable performance in demanding SUH31-specified valve applications.
Thermal Expansion Properties – Critical for SUH31 Valve Design
| Temperature Range | 20-100°C | 20-200°C | 20-400°C | 20-600°C |
|---|---|---|---|---|
| Coefficient (10⁻⁶ °C⁻¹) | 16.3 | 17.4 | 17.9 | 17.7 |
SUH31 Valve Design Advantage: Predictable thermal expansion characteristics are crucial for SUH31 valve performance. 1.2731’s controlled expansion properties ensure reliable valve operation across wide temperature ranges in engine and industrial applications.
1.2731 SUH31 Valve Steel & Tool Steel Applications
SUH31 High-Temperature Valves
Exceptional performance in exhaust valves, steam valves, and high-temperature industrial valves meeting SUH31 specifications for thermal stability and corrosion resistance.
Copper Extrusion Dies
Specialized extrusion dies for copper and copper alloys, leveraging SUH31’s superior hot work properties and tungsten-enhanced wear resistance.
Valve Components (SUH31)
Forged valve stems, valve seats, and valve guides conforming to SUH31 standards, requiring exceptional strength and thermal stability in demanding environments.
Hot Forming Tools
High-temperature forming tools and dies where SUH31-grade materials are specified for extreme operating conditions and extended service life.
Available Forms for SUH31 Valve & Tool Manufacturing
Forged Discs (SUH31)
Precision forged discs meeting SUH31 specifications, optimized for valve manufacturing and specialized tool applications
Round Bars
High-quality SUH31-grade round bars for valve stem production and precision tool manufacturing
Tubes
Seamless tubes conforming to SUH31 standards for specialized valve applications and complex tool geometries
Simple Profiles
Custom SUH31 profiles designed for specific valve and tool manufacturing requirements
Heat Treatment & Processing for SUH31 Valve Applications
SUH31 Ready-to-Use Condition
Supplied at SUH31-specified service hardness of approximately 1000 N/mm², ready for immediate valve manufacturing without additional heat treatment.
Preheating Requirements
Preheating to 400-500°C is recommended before use to ensure optimal SUH31 performance in valve applications.
Hot Forming Temperature
Optimal hot forming temperature of 1100-850°C for SUH31 valve forging and specialized component manufacturing.
1.2731 SUH31 Key Advantages for Valve & Tool Applications
SUH31 Tungsten-Vanadium Enhancement
Tungsten (2.15%) and vanadium (0.65%) content meeting SUH31 specifications provides exceptional high-temperature strength and wear resistance for demanding valve applications.
Excellent Corrosion Resistance
Balanced chromium-nickel content ensures superior corrosion resistance conforming to SUH31 standards in aggressive valve environments and high-temperature conditions.
Thermal Stability (SUH31)
Austenitic structure maintains integrity and predictable thermal expansion across wide temperature ranges critical for SUH31 valve performance specifications.
Ready-to-Use SUH31 Hardness
Supplied at optimal SUH31 service hardness, eliminating complex heat treatment requirements and reducing manufacturing costs for valve producers.
FUSHUN SPECIAL STEEL Manufacturing Excellence
Advanced Melting Technology
State-of-the-art melting processes ensure precise tungsten-vanadium control and ultra-clean SUH31-grade steel production for consistent valve performance.
SUH31 Forging Expertise
Specialized forging capabilities for SUH31 valve components and tool applications, ensuring optimal grain structure and mechanical properties.
Quality Assurance
Comprehensive testing protocols including hardness testing, thermal expansion verification, and microstructural examination for SUH31 valve applications.
Global SUH31 Support
Worldwide distribution with dedicated support for valve manufacturers requiring SUH31-grade steel solutions and technical consultation.
Leading 1.2731 SUH31 Valve Steel & Tool Steel Manufacturer
FUSHUN SPECIAL STEEL is your premier manufacturer for 1.2731 X50NiCrWV13-13 SUH31 valve steel and tool steel. We deliver advanced tungsten-vanadium enhanced solutions for demanding valve and tool applications.
Experience the SUH31 advantage – contact our valve steel specialists for your requirements.
Ready for 1.2731 SUH31 Valve Steel Excellence? Contact FUSHUN SPECIAL STEEL
Join valve manufacturers worldwide who trust FUSHUN SPECIAL STEEL for premium 1.2731 SUH31 valve steel and tool steel solutions. As your dedicated manufacturer, we provide advanced tungsten-vanadium enhanced steel technology.
Contact our 1.2731 SUH31 valve steel division today for technical consultation and competitive pricing.
