Tech Insights

Density is one of the quiet variables that shapes every stainless steel project. It turns a drawing into a shipping weight, a casting model into a material quotation, and a tank wall into a lifting requirement. Yet using one generic value for every stainless steel grade can create avoidable errors, especially when quantities are large or weight is commercially important. This guide provides a practical stainless steel density chart, explains why grades differ, and shows how engineers and purchasers can use density correctly for sheet, machined parts and investment cast components. Comparing stainless steel mass starts with defined geometry, a known grade and an appropriate density value. What Is the Density of Stainless Steel? Most stainless steels have a density between approximately 7.7 and 8.0 g/cm³, or 7,700 to 8,000 kg/m³. Austenitic grades such as 304 and 316 are generally at the upper end of that range, while ferritic and martensitic grades are usually lighter. Duplex grades normally sit between the two. Density is mass divided by volume. It should not be confused with strength, hardness or corrosion resistance. A lower-density grade is not automatically a better lightweight material: its mechanical properties, corrosion performance, fabrication method and life-cycle cost still control material selection. Stainless Steel Density Chart by Grade The following figures are typical nominal values at or near room temperature (about 20°C). They are suitable for preliminary weight calculation, costing and logistics planning. For critical design, contractual mass guarantees or material verification, use the applicable producer data sheet, purchase specification or material test certificate. Stainless Steel Grade Metallurgical Family Density (g/cm³) Density (kg/m³) Density (lb/in³) 304 / 304L Austenitic 7.93 7,930 0.286 316 / 316L Austenitic 7.98 7,980 0.288 321 Austenitic, Ti-stabilized 7.93 7,930 0.286 904L High-alloy austenitic 8.00 8,000 0.289 430 Ferritic 7.70 7,700 0.278 410 Martensitic 7.75…

Stainless steel is corrosion-resistant, not corrosion-proof. Learn why it rusts, compare 304, 316L and duplex grades by environment, and prevent corrosion failures.

Compare common metal material grades across GB/T, ASTM/UNS/SAE, EN/DIN and JIS for stainless steel, alloy steel, aluminum, copper, titanium and nickel alloys.

Compare duplex stainless steel grades with 304 and 316L for corrosion, strength and wear-related service. Learn when 2205 or 2507 is the better material choice.

Explore high-temperature alloy bolt materials, including A-286, Inconel X-750, Inconel 718 and Waspaloy, with practical guidance for heat-resistant fastener selection.

Precision casting, also known as investment casting or lost-wax casting, is a metal forming process used to produce parts with accurate dimensions, clean surfaces, and complex shapes that are difficult to make by ordinary machining or sand casting. It is widely used for stainless steel, carbon steel, alloy steel, aluminum, brass, and other metals. The main value of precision casting is simple: it allows manufacturers to turn an exact pattern into a near-net-shape metal component. That means less machining, less material waste, and better consistency from part to part. How Precision Casting Works The process starts with a wax pattern. This wax pattern has the same shape as the final casting. Several wax patterns are often connected to a central runner system to form a wax tree. The tree is then dipped into ceramic slurry and coated with fine refractory material. After several layers are built up and dried, the ceramic shell becomes strong enough to hold molten metal. Next, the wax is melted out of the ceramic shell. This is why the process is often called lost-wax casting. The empty ceramic cavity is heated, and molten metal is poured into it. After cooling, the ceramic shell is removed, the individual castings are cut from the tree, and each part is cleaned, heat treated, machined, and inspected as required. Why Manufacturers Use Precision Casting Precision casting is chosen when a part needs a good balance of shape complexity, dimensional accuracy, and reliable mechanical performance. Compared with many other casting methods, it can produce thinner walls, finer details, and smoother surfaces. It is especially useful for parts with internal shapes, curved profiles, ribs, bosses, holes, and other features that would be costly to machine from solid material. For buyers, the advantage is not only the shape. A well-controlled precision casting process…

When comparing 304 vs 316 stainless steel for a real component, the right choice depends less on appearance and more on service environment. Both grades look almost identical at first glance, but 304 vs 316 stainless steel performance can differ sharply when the part has to live with chloride, salt spray, cleaning chemicals, higher corrosion risk, or a strict cost target. In short, 304 stainless steel is a practical, cost-effective choice for general industrial environments. 316 stainless steel adds molybdenum, which gives it stronger resistance to pitting and crevice corrosion, especially in marine, chemical, and chloride-rich conditions. What is 304 stainless steel? 304 stainless steel is the most common grade in the 300-series stainless family. It typically contains around 18% chromium and 8% nickel, which is why it is often described as 18/8 stainless steel. This composition gives 304 good corrosion resistance, clean appearance, and reliable performance in many indoor and mildly outdoor applications. For machined parts, cast components, brackets, housings, food equipment parts, and general hardware, 304 is often the first grade engineers consider. It balances availability, fabrication performance, and cost very well. What is 316 stainless steel? 316 stainless steel is also an austenitic stainless steel, but it includes molybdenum in addition to chromium and nickel. That molybdenum content is the key reason 316 performs better where chlorides or aggressive chemicals are present. If the part will be used near seawater, exposed to de-icing salts, cleaned frequently with chemical agents, or installed in a corrosive processing environment, 316 is usually the safer option. It is not “rust-proof,” but it gives the surface more time and resistance before localized corrosion starts. 304 vs 316 stainless steel: main differences Factor 304 stainless steel 316 stainless steel Main alloy difference Chromium and nickel based Chromium, nickel, plus molybdenum Corrosion resistance Good…

Stainless steel gear components often look simple from a distance, but the critical work happens inside the tooth profile, bore, and internal contour. When these areas must be accurate, smooth, and consistent, slow wire EDM machining is one of the most reliable ways to produce the geometry without forcing the material or creating heavy cutting stress. For Aodson, wire EDM is especially useful on stainless steel parts where a clean internal profile, stable fit, and repeatable edge quality matter. The process uses a thin traveling wire and controlled electrical discharge to remove material along the programmed path. Because the tool does not push against the part like a conventional cutter, the final profile can stay very close to the CAD design even when the component has narrow slots, small radii, or deep internal features. Why stainless steel gear parts benefit from slow wire EDM Stainless steel is strong, corrosion resistant, and durable, but it can be demanding to machine. Heat, work hardening, and tool pressure may affect dimensional control during traditional cutting. Slow wire EDM helps reduce these concerns because the cutting force is extremely low and the wire follows the programmed contour with fine control. This makes the process suitable for gear-like parts, pump components, mechanical transmission parts, indexing pieces, and custom stainless profiles that require accurate mating surfaces. Internal gear windows and curved tooth roots can be cut directly rather than approximated with multiple milling passes. Key advantages for precision gear profiles Process considerations before cutting A successful wire EDM part starts before the machine is switched on. Material grade, blank thickness, start-hole position, allowance, drawing tolerance, and final surface requirement should be reviewed together. For stainless steel gear components, the cutting path must protect the functional tooth profile while allowing enough material for finishing if polishing or…

Explore stainless steel recessed manhole covers, hidden linear drainage channels and stainless steel grating for commercial, industrial and architectural floors, including application scenarios, selection tips and installation methods.

Why Concealed Hinges Matter in Modern Architectural Doors In high-end commercial buildings, hotels, villas, offices, hospitals, and public facilities, door hardware is expected to do more than simply open and close. It must support heavy panels, maintain accurate alignment, protect the door structure, and preserve a clean architectural appearance. That is why more contractors and door manufacturers are choosing concealed hinges, also called hidden hinges or invisible hinges. A concealed hinge is installed inside the door leaf and frame, so the hinge body is not exposed when the door is closed. This creates a flush, minimalist look while improving safety, reducing tampering risks, and supporting premium door designs such as marble doors, fire-rated doors, wooden doors, metal doors, and custom architectural panels. AODSON provides professional concealed hinge solutions for demanding door projects, including marble-clad doors and fire door applications where strength, precision, and reliable installation are essential. Concealed Hinges for Marble Doors Marble doors are visually impressive, but they also place special demands on hinge hardware. Natural stone, composite stone, and marble-faced panels are heavier than standard interior doors. They also require careful support to avoid sagging, cracking, edge damage, or uneven gaps over time. For marble door concealed hinge applications, the hinge should offer: When properly selected and installed, AODSON concealed hinges help marble doors achieve a refined appearance without sacrificing durability. This makes them suitable for luxury apartments, hotel suites, office lobbies, private clubs, showrooms, and high-end residential projects. Concealed Hinges for Fire-Rated Doors Fire-rated doors require hardware that supports safety, stability, and compliance with the door system design. In many modern buildings, designers want fire doors to look clean and integrated with the surrounding wall, especially in corridors, public areas, and commercial interiors. A fire door concealed hinge solution can help achieve that appearance while supporting reliable…