EDC Gear Materials

14C28N is a premium martensitic stainless chromium steel developed by Sandvik for applications demanding a superior combination of edge performance, corrosion resistance, and ease of sharpening. Its optimized chemical composition typically includes approximately 0.62% Carbon (C), 14.0% Chromium (Cr), 0.11% Nitrogen (N), 0.2% Silicon (Si), and 0.2% Manganese (Mn). The carbon content contributes significantly to its high hardness and excellent edge retention, while the high chromium content, complemented by nitrogen, ensures outstanding corrosion resistance. The addition of nitrogen also promotes a fine grain structure and further enhances corrosion resistance. This steel is renowned for its ability to achieve a very fine, sharp edge and maintain it, coupled with good toughness for a steel of its hardness, making it highly versatile.

5Cr13MoV is a Chinese martensitic stainless steel, often considered a budget-friendly option for cutlery and tools. Its composition typically includes approximately 0.45-0.55% Carbon, 12.0-14.0% Chromium, 0.15-0.30% Molybdenum, and 0.10-0.20% Vanadium, along with smaller amounts of Manganese and Silicon. The high chromium content provides good corrosion resistance, while the carbon, molybdenum, and vanadium contribute to decent edge retention and wear resistance through the formation of carbides. It offers a good balance of properties for its cost, being relatively easy to sharpen and maintain, though its edge retention is not as high as premium steels. It is heat-treatable to achieve desired hardness levels.

9Cr18MoV is a high-carbon martensitic stainless steel, primarily developed in China. It is characterized by its excellent balance of properties, offering high hardness, good wear resistance, and strong corrosion resistance. The high chromium content (typically around 18%) forms a protective passive layer, while the significant carbon content (around 0.9%), along with additions of Molybdenum and Vanadium, contributes to its ability to achieve high hardness and maintain a sharp edge. Vanadium forms fine carbides that enhance wear resistance and grain refinement, and Molybdenum further improves corrosion resistance, particularly pitting resistance, and high-temperature strength. It is often considered a Chinese equivalent to steels like 440B or 440C, depending on the specific composition and heat treatment.

AEB-L is a high-carbon, low-chromium stainless steel, originally developed by Uddeholm (Sweden) for razor blades. It is renowned for its exceptionally fine grain structure and very small, evenly distributed carbides, which allow it to achieve and maintain an extremely keen and stable edge. This fine microstructure contributes to its excellent toughness for its hardness level, making it less prone to chipping compared to some other high-hardness steels. While its corrosion resistance is good, it is not as high as some super-stainless steels, requiring reasonable care. It is also known for being relatively easy to sharpen to a very high degree of polish.

AR-RPM9 is a proprietary spray-form stainless steel developed by Artisan Cutlery and CJRB, primarily engineered for knife blade applications. Although initially promoted with an emphasis on its 'nine elements' and powder metallurgy characteristics, it is essentially a spray-formed variant of 9Cr18MoV steel. This composition is closely related to 440C stainless steel but differentiates itself through its unique manufacturing process. The spray-forming technique yields a significantly finer and more uniform microstructure, characterized by smaller, rounder carbides compared to conventionally produced 9Cr18MoV or 440C. This microstructural refinement substantially enhances its toughness, making it more resistant to chipping, while simultaneously preserving excellent corrosion resistance and good edge retention. A key attribute of AR-RPM9 is its balanced performance profile – offering good toughness, high corrosion resistance, and relative ease of sharpening – all at an accessible price point, positioning it as a popular choice for value-oriented yet capable knives.

CPM S90V is a high-performance martensitic stainless steel produced by Crucible Industries, utilizing their proprietary Crucible Particle Metallurgy (CPM) process. This powder metallurgy process ensures a very fine and uniform distribution of its high alloy content, particularly its exceptionally high vanadium content (approximately 9%). This high vanadium forms a significant volume of extremely hard vanadium carbides within the steel matrix, which are the primary contributors to its unparalleled wear resistance and superior edge retention. It also contains a substantial amount of chromium (around 14%) providing significant corrosion resistance. While offering top-tier performance for demanding applications, its extreme hardness and high carbide volume make it notoriously difficult to grind, sharpen, and polish, often requiring diamond abrasives. Proper heat treatment is crucial to optimize its balance of hardness and toughness.

D2 is a high-carbon, high-chromium tool steel, known for its excellent wear resistance and good toughness. It is an air-hardening steel, meaning it can be hardened by cooling in air after austenitizing, which contributes to good dimensional stability during heat treatment. Its high chromium content (typically 11-13%) provides moderate corrosion resistance, superior to many other tool steels but not considered stainless. The high carbon content (typically 1.4-1.6%) combined with chromium forms a significant volume of hard carbides, which are responsible for its exceptional wear resistance. However, these carbides also make it somewhat difficult to machine and grind. It exhibits high compressive strength and retains a good cutting edge.

A6061-T6 is a precipitation-hardened aluminum alloy, part of the 6xxx series, which primarily contains magnesium and silicon as its major alloying elements. The 'T6' temper indicates that the alloy has been solution heat-treated and artificially aged, resulting in significantly increased strength and hardness. It is renowned for its excellent combination of high strength-to-weight ratio, good weldability, and superior general corrosion resistance, particularly in atmospheric and marine environments. It also exhibits good machinability and moderate formability. This alloy is non-magnetic and has good thermal and electrical conductivity.

Aluminum is a lightweight, silvery-white, soft, non-magnetic, and ductile metal. It is the third most abundant element in the Earth's crust. It forms a passive oxide layer when exposed to air, providing excellent natural corrosion resistance. It is an excellent conductor of heat and electricity and is highly recyclable. While pure aluminum is relatively soft, it is frequently alloyed with other elements (like copper, magnesium, silicon, zinc) to significantly increase its strength, making it suitable for structural applications.

Brass is a versatile alloy primarily composed of copper and zinc, with varying proportions that dictate its specific properties. It is highly valued for its excellent workability (malleability and ductility), good electrical and thermal conductivity, and attractive golden-yellow appearance. Brass exhibits good corrosion resistance, particularly to water and saline environments, making it suitable for marine applications. Its copper content also provides inherent antimicrobial properties. Minor additions of other elements like lead (to improve machinability), tin, manganese, or aluminum can further modify its characteristics, such as strength, color, and corrosion resistance.

G10 is a high-pressure fiberglass laminate, a type of composite material. It is manufactured by stacking multiple layers of glass cloth, saturating them with an epoxy resin, and then compressing the resulting material under high heat and pressure until the epoxy cures. This process yields an extremely dense, hard, and lightweight material with a distinctive layered appearance. Its cross-hatched fiber structure provides exceptional strength, impact resistance, and resistance to cracking or chipping. G10 exhibits excellent dielectric properties, making it an effective electrical insulator. It is highly resistant to moisture, chemicals, and temperature fluctuations, ensuring superior dimensional stability even in harsh environments. Its non-porous nature prevents the absorption of liquids and odors, contributing to its hygiene and ease of maintenance.

Glass-Reinforced Nylon (GRN) is a high-performance thermoplastic composite material, typically consisting of a nylon (polyamide) polymer matrix reinforced with chopped glass fibers. The addition of glass fibers significantly enhances the mechanical properties of the base nylon, including tensile strength, flexural modulus, and dimensional stability. It exhibits a higher heat deflection temperature, reduced creep, and a lower coefficient of thermal expansion compared to unreinforced nylon. GRN maintains good chemical resistance to many oils, fuels, and solvents, and offers improved abrasion and fatigue resistance. Its excellent processability allows for complex part geometries through injection molding. The specific properties vary depending on the type of nylon (e.g., PA6, PA66) and the percentage of glass reinforcement (commonly 10% to 50%). While generally tougher than unreinforced nylon, high glass content can sometimes lead to increased brittleness in certain impact scenarios.

Grade 2 titanium is the most widely used commercially pure (CP) titanium, often referred to as 'workhorse' titanium. It offers an excellent balance of moderate strength, good ductility, and superior corrosion resistance, particularly in oxidizing and mildly reducing environments, including seawater, chlorides, and various acids. It is highly weldable, formable, and possesses good impact toughness. Its non-magnetic nature and biocompatibility further expand its application range.

Grade 5 Titanium, also known as Ti-6Al-4V, is the most commonly used titanium alloy, accounting for over 50% of total titanium usage. It is an alpha-beta alloy containing 6% aluminum and 4% vanadium. This alloy is renowned for its exceptional combination of high strength-to-weight ratio, excellent corrosion resistance (especially to seawater, chlorides, and many acids), good fracture toughness, and superior fatigue strength. It is heat treatable, allowing for increased strength, and exhibits good biocompatibility, making it suitable for medical applications. While it offers outstanding performance, it is more expensive and generally more challenging to machine and form compared to many other engineering metals.