Introduction
High‑Alloy Steel Plate is a premium flat product in which alloying elements-such as chromium, nickel, molybdenum, vanadium, and sometimes cobalt-are added at levels typically above 5% total to impart exceptional hardness, wear resistance, corrosion resistance, and strength at elevated temperatures. These plates are engineered for the most demanding applications, including petrochemical processing, power generation, aerospace, and specialty tooling where ordinary steels cannot endure.
Key Specifications
| Specification | Details |
|---|---|
| Base Material | Carbon steel with ≥ 5% total alloying elements |
| Common Grades | ASTM A387 Gr. 11/22/91, 304/316L (EN 10028-7), Alloy 20, Inconel® 625, Hastelloy® C276 |
| Plate Thickness Range | 3.0 – 200 mm |
| Plate Width Range | 1,000 – 4,000 mm |
| Plate Length Range | 2,000 – 12,000 mm |
| Yield Strength | 250–950 MPa (grade dependent) |
| Tensile Strength | 450–1,200 MPa |
| Elongation (min) | ≥ 10 % |
| Hardness (max) | 250 HBW–600 HBW (depending on temper and grade) |
| Corrosion Resistance | Excellent in acids, chlorides, high‑temperature environments |
| Surface Finish | Mill scale, pickled, shot‑blasted, or precision ground |
Custom chemistries, heat treatments, and dimensions available on request.
Features & Advantages
Superior Corrosion Resistance: High chromium and nickel content resists pitting, crevice attack, and stress‑corrosion cracking in aggressive media.
Exceptional High‑Temperature Performance: Maintains mechanical strength and oxidation resistance up to 800 °C+ in many grades.
Outstanding Wear Resistance: Alloying with molybdenum, vanadium, and cobalt produces fine carbide dispersions for erosion and abrasion resistance.
High Mechanical Strength: Optimized alloy balance delivers tensile and yield strengths far exceeding those of carbon and low‑alloy steels.
Excellent Weldability & Fabricability: Grades formulated for stable welds and formability, with minimal post‑weld heat treatment required.
Applications
Petrochemical & Chemical Processing: Reactor vessels, heat exchangers, piping, and scrubbers handling sour or acidic streams.
Power Generation: Boiler tubes, superheater panels, and turbine casings exposed to corrosive flue gases and high temperatures.
Aerospace & Defense: Engine components, exhaust liners, and structural panels requiring heat and corrosion tolerance.
Mining & Minerals: Crusher liners, pump casings, and slurry piping facing abrasive, corrosive slurries.
Tooling & Molds: High‑temperature die plates, extrusion equipment, and glass‑container molds.
Packaging & Delivery
Packaging:
Plates stacked on treated timber or polymer skids with plastic or kraft interleaving.
Edges protected by galvanized steel angles; wrapped in moisture‑barrier film or oiled to prevent oxidation.
Delivery Lead Time: Standard production and shipment within 30–50 days after order confirmation; accelerated schedules available for critical projects.
Why Choose Our High‑Alloy Plates?
Advanced Metallurgy: Vacuum‑induction melting and ladle refining ensure ultra‑low inclusion levels and precise alloy chemistry.
Stringent Quality Control: Comprehensive testing including ultrasonic flaw detection, hardness mapping, tensile and impact testing, and corrosion evaluation.
Tailored Heat Treatments: Customized quenching, tempering, and annealing cycles to achieve target microstructures and mechanical properties.
Technical Expertise: In‑house metallurgists and application engineers support grade selection, weld procedure development, and failure analysis.
Contact Us
For high‑performance High‑Alloy Steel Plates engineered to your exact service conditions, please contact our sales team. We're ready to provide material test certificates, detailed quotations, and expert guidance for your most demanding applications.
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