20 Years Experience | 1000+ Brand Partners | Full Customization
We have 20 years of industry experience, have partnered with over 1,000 brands, and support any customization needs.
Technical Specifications
Product Overview
Metallurgical Characteristics
GB 9Cr18Mo is a high-carbon martensitic stainless steel with a complex microstructure consisting primarily of tempered martensite with dispersed chromium carbides. The high carbon content (0.85-0.95%) enables exceptional hardness after heat treatment, while the 17-19% chromium provides adequate corrosion resistance. The addition of molybdenum enhances hardenability and improves resistance to pitting corrosion.
Heat Treatment Process
MetalZenith employs precise heat treatment protocols for optimal performance. Annealing is performed at 840-870°C followed by slow cooling to achieve maximum softness for machining. Hardening involves austenitizing at 1020-1050°C, followed by oil or air quenching to achieve maximum hardness. Tempering at 150-200°C reduces brittleness while maintaining high hardness levels of 58-62 HRC.
Manufacturing Process Excellence
Our manufacturing process begins with carefully selected raw materials melted in vacuum induction furnaces to ensure chemical homogeneity and minimal inclusion content. The molten steel undergoes electroslag remelting (ESR) for further purification. Hot rolling and forging operations are performed within controlled temperature ranges to achieve optimal grain structure. Cold working processes include precision drawing and rolling to achieve tight dimensional tolerances.
Quality Standards and Testing
MetalZenith maintains strict quality control throughout production, with comprehensive testing including chemical analysis by optical emission spectroscopy, mechanical testing per ASTM standards, ultrasonic testing for internal soundness, and dimensional inspection. All products are supplied with material test certificates (MTC) and comply with international standards including GB/T 1220, ASTM A276, and EN 10088-3. Our quality management system is certified to ISO 9001:2015 and AS9100D for aerospace applications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.85-0.95 |
| Chromium (Cr) | 17.0-19.0 |
| Molybdenum (Mo) | 0.10-0.20 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Nickel (Ni) | ≤ 0.60 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Hardened & Tempered) | ≥ 1960 MPa |
| Yield Strength (0.2% Offset) | ≥ 1570 MPa |
| Elongation (A5) | ≥ 2% |
| Reduction of Area | ≥ 5% |
| Hardness (Hardened & Tempered) | 58-62 HRC |
| Impact Energy (Charpy V-notch, 20°C) | ≥ 15 J |
| Elastic Modulus | 200 GPa |
| Fatigue Limit (107 cycles) | 850 MPa |
| Poisson's Ratio | 0.27-0.30 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.70 g/cm³ |
| Melting Point | 1480-1520°C |
| Thermal Conductivity (20°C) | 24.2 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 10.4×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.60 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 760°C |
| Thermal Diffusivity | 6.8×10-6 m²/s |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, sheets, plates, strips, tubes, forgings |
| Round Bar Diameter | 6-500 mm |
| Flat Bar Dimensions | 10-200 mm thickness, up to 500 mm width |
| Sheet/Plate Thickness | 0.5-100 mm |
| Surface Finish | Hot rolled, cold drawn, ground, polished, machined |
| Heat Treatment Condition | Annealed, hardened & tempered, stress relieved |
| Standards Compliance | GB/T 1220, ASTM A276, EN 10088-3, JIS G4303 |
| Dimensional Tolerance | h9-h11 (bars), ±0.1-0.5 mm (sheets) |
| Length Options | 3-12 meters (standard), custom lengths available |
Let Us Create Success for Your Project
Professional Team, Premium Products, Complete Service - Your Project Success is Our Mission
Our Advantages in Processing GB 9Cr18Mo
Advanced Vacuum Melting Technology
MetalZenith utilizes state-of-the-art vacuum induction melting (VIM) and electroslag remelting (ESR) processes to produce GB 9Cr18Mo with exceptional chemical homogeneity and minimal inclusion content. Our controlled atmosphere melting ensures superior cleanliness and consistent mechanical properties throughout the material.
Precision Heat Treatment Capabilities
Our advanced heat treatment facilities feature computer-controlled furnaces with precise temperature and atmosphere control, enabling optimal austenitizing, quenching, and tempering cycles. This ensures consistent hardness levels up to 60 HRC while maintaining excellent toughness and dimensional stability.
Comprehensive Customization Services
MetalZenith offers extensive customization options including precision machining, surface treatments, and specialized heat treatment schedules tailored to specific applications. Our engineering team provides technical support for material selection and processing optimization to meet unique customer requirements.
YOUR TRUSTED STEEL
MANUFACTURING PARTNER
Quick Inquiry
Industries We Serve
Professional steel solutions across major industries
Qualifications & Certifications
