Industry Insights

Technical Blog & Industry News

Expert insights on cobalt alloys, wear-resistant materials, and industrial sourcing from Qingdao STECO Metal.

Stellite

Stellite 720 Composition Properties and Alloy Comparisons

Stellite 720 is a high carbon cobalt chromium molybdenum alloy in the Stellite 700 series. Its unusually high chromium, molybdenum, and carbide content gives it a combination of high hardness, abrasion resistance, and corrosion resistance in reducing or chemically complex environments. What Is Stellite 720 The Stellite 700 family includes Stellite 703, 704, 706, 712, […]

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Uncategorized

Stellite 25 Composition Properties and Applications

Stellite 25 is a cobalt chromium tungsten nickel alloy developed for high temperature strength, oxidation resistance, and resistance to galling. In wrought alloy specifications it is widely associated with Haynes 25, L605 or L-605, Alloy 25, and UNS R30605. Unlike carbide-rich Stellite wear grades, this alloy uses a low-carbon, solid-solution-strengthened matrix to retain ductility and […]

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Stellite Stellite 6

Stellite 6 in Liquid Hydrogen Valves

Liquid hydrogen at -253°C punishes valve materials in ways conventional industrial service never does. Extreme thermal contraction and near-zero lubrication at metal contact surfaces make the seat, wedge, disc, and sealing face the components that decide whether an LH₂ valve holds up in service — and Stellite 6 is the material the cryogenic valve industry […]

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Stellite 20

Stellite 20 Valve Balls and Homogenizer Valve Parts

Wear-resistant cobalt alloy components for high-pressure valve assemblies What Is Stellite 20? Stellite 20 is a high-carbon cobalt-chromium-tungsten alloy used where hard particles, corrosive process media, and repeated surface contact cause rapid wear. Its nominal composition contains approximately 32.5% chromium, 17.5% tungsten, and 2.5% carbon, with cobalt as the balance, while published hardness is approximately […]

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Stellite 6

Stellite 6B Plate: Composition, Hardness, Applications, and Product Forms

Technical reference for Stellite 6B plate, sheet, and flat stockStellite 6B is a wrought cobalt-chromium-tungsten alloy supplied as hot rolled plate, sheet, strip, and flat stock.It is used for solid components that require resistance to wear, galling, erosion, corrosion, and elevated-temperature service. What Is Stellite 6B Plate? Stellite 6B plate is the flat-rolled form of […]

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Stellite 6

Stellite 6K Sheet

Technical reference for Stellite 6K sheet, plate, and flat stock Stellite 6K is a hot-rolled cobalt-chromium-tungsten alloy developed for industrial cutting, scraping, and slitting components. It is supplied as sheet, strip, plate, flat stock, rectangular blanks, and profile-cut blade material. The sections below address the technical questions most often associated with Stellite 6K flat products. […]

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Stellite 6

Stellite 6 Powder: Selection Guide for HVOF, Plasma Spray, PTA, and Laser Cladding

Why the Powder Specification Matters More Than the Grade When buyers source stellite powder, chemistry is usually the first question asked and the last one that causes problems. Two lots of Stellite 6 powder can be chemically identical and still behave completely differently in your equipment: one feeds smoothly and produces a dense, well-bonded coating, […]

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Stellite 6

High-Performance Stellite Round Bars: Material Selection Guide for Demanding Industrial Environments

Stellite round bars are widely specified in industries where component wear, heat, and corrosion directly drive maintenance costs and unplanned downtime. Unlike standard tool steels and stainless alloys, Stellite 6 maintains hardness and corrosion resistance in continuous service up to 800°C, making it a standard choice for valve trim, hardfacing overlays, and rotating equipment components […]

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Stellite Stellite 21

When to Choose Stellite 21 Alloy

Stellite 21 is often misunderstood because it does not win the simple hardness comparison. If the only question is which Stellite grade is harder, Stellite 21 is usually not the answer. But many real components do not fail because they need the highest hardness. They fail because corrosion, cavitation, erosion, impact, thermal fatigue, and moderate […]

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Stellite Stellite 6

When to Choose Stellite 12 Over Stellite 6

Stellite 6 is often the first cobalt alloy engineers consider for wear parts, and for good reason. It gives a practical balance of wear resistance, anti-galling behavior, corrosion resistance, hot hardness, and manufacturability. But when the damage on the part is dominated by severe abrasive wear or high contact pressure, Stellite 6 may not be […]

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Stellite Stellite 6

Stellite 6 Welding Rod: Properties, Applications, and Supplier Selection Guide

Stellite 6 welding rod is usually selected when a standard steel filler cannot create the wear-resistant surface an industrial part needs. Buyers and welding engineers use it to build or repair hardfaced layers on valve seats, seal faces, pump parts, sleeves, and other components exposed to sliding wear, abrasion, galling, or elevated temperature. The important […]

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Stellite

Cobalt Alloy Valve Seats for Severe Service Valves: Material, Grades, and Custom Manufacturing Guide

In severe service valves, the valve seat is often the small contact surface that determines whether the entire valve can keep sealing under pressure, temperature swings, solids, and repeated cycling. When that contact band wears, galls, erodes, or loses geometry, leakage starts long before the valve body itself reaches the end of its life. This […]

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Stellite Stellite 6

Stellite 6 Hardfacing for Oil and Gas Valve Seats: Process, Benefits, and Quality Control

Hardfacing Is a Process, Not Just a Material Name Stellite 6 hardfacing is used on oil and gas valve seats because the working surface needs properties the base valve material usually cannot provide alone. The base metal provides structure and pressure support. The Stellite 6 layer protects the sealing face from galling, abrasion, erosion, corrosion-wear, […]

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Stellite Stellite 1 Stellite 12 Stellite 20 Stellite 21 Stellite 6

What Are the Main Grades of Stellite Alloy?

Struggling to choose the right Stellite alloy? The number of grades can be confusing, and picking the wrong one leads to premature failure and costly downtime for your equipment. There is no single “best” Stellite grade. The main grades like Stellite 1, 6, 12, and 21 are simply different material solutions for different problems. The […]

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