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Crownia’s wholly owned subsidiary Jinsili, is a global specialty steel trader and distributor, which sells specialty steel products by virtue of the integration of Chinese strategic steel suppliers and global steel customers. Jinsili focuses on providing supply of specialty steel products to its customers in international markets, mainly emerging and developing countries with a large demand for specialty steel and countries with a developed manufacturing market.


Carbon structural steel

SAE1020, SAE1045, S355J2G3 Carbon structural steel

Carbon structure steel is steel where the main interstitial alloying constituent is carbon in the range of 0.12%-2.0%. The American Iron and Steel Institute (“AISI”) defines carbon steel as the following: “Steel is considered to be carbon steel when no minimum content is specified or required for chromium, cobalt, molybdenum, nickel, niobium, titanium, tungsten, vanadium or zirconium, or any other element to be added to obtain a desired alloying effect; when the specified minimum for copper does not exceed 0.40%, or when the maximum content specified for any of the following elements does not exceed the percentages noted: manganese 1.65%, silicon 0.60%, copper 0.60%.”


Alloy steel

AISI4140, AISI4130, AISI4340, AISI4145, SAE8620, 16MnCr5 Alloy structural steel

Alloy steel is steel that is alloyed with a variety of elements in total amounts between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low-alloy steels and high-alloy steels. The difference between the two is defined arbitrarily. However, most industry participants agree that any steel with alloyed elements (beside iron and carbon) that weight more than 8% of the steel’s weight, is considered high-alloy steel. Low-alloy steels are slightly more common and are usually used to achieve better harden ability, which in turn improves its other mechanical properties.

Alloy mould steel

P20, 1.2738, 1.2312, 1.2316, 1.2344, 1.2379, 1.2080, 1.2367 Alloy mould steel

Mould steel is used to make cold die and hot-forging moulds. Moulds are main processing tools used in machinery manufacturing, radio instruments, motors, appliances and in other industrial sectors. Mould/die steel can be classified into the following three categories: cold die steel, hot work die steel, and plastic mould steel. Mould steels are used for forging, stamping, cutting, and die-casting. Various mould/die steels are used for different purposes, and working conditions under which the mould/die steels are used can be complex. As a result, such mould/die steel needs to have a high level of hardness, strength, wear resistance, adequate toughness, high hardenability and meet other specific performance criteria. Performance requirements may vary due to the various working conditions under which the mould/die steel is used and different usage purposes.


Spring steel

100Cr6, 60Si2Mn Spring steel

Spring steel is a low alloy, medium carbon steel or high carbon steel with a very high yield strength. This allows objects made of spring steel to return to their original shape despite significant bending or twisting.Spring steel is one of the most popular materials used in the fabrication of lock picks due to its pliability and resilience. Tubular spring steel is used in landing gear of some smaller aircraft due to its ability to absorb the shock from landing. Other applications include piano wire, spring clamps, antennas, and springs.

Bearing steel

GCr15, SUJ2 Bearing steel

Bearing steel has carbon content in the range of 0.55-1.10%, manganese in the range of 0.10-1.15%, silicon in the range of 0.15- 2.0%, phosphorus and sulfur up to a maximum of 0.03%, chromium in the range of 0.5-2.0%, with the remaining percentage being iron. Chemical properties and composition determine the anti-corrosive properties of the bearing steel and dictate its mechanical and physical properties such as the strength and hardness, toughness and brittleness and ductility and malleability.Bearings are important mechanical components that find their primary application in continuously moving machine parts that may get subjected to high fatigue and stress conditions. These bearings help transmit dynamic loads within the machine body as well as reduce friction between the moving parts, thereby ensuring a smooth motion. Bearings could be of various types such as ball bearings, tapered, cylindrical and needle roller bearings. Bearings are manufactured using a grade of steel called bearing steel that has mechanical properties which are more suited for lowering the friction levels.Bearing steel has enormous hardness because the manufacturing process of bearing steel requires melting and degassing of the metal followed by certain metallurgical processes. It is then tempered and quenched. Bearing steel has a bending strength of 2400 MPa (Pascal Unit) and can withstand high stress and centrifugal forces but generally has a low corrosion resistance. Carbon increases the strength of bearing steel. Strength ensures that parts (i.e., bearings) made from it do not deform on the application of stress and load. Ductility and weldability, however, decrease with increasing carbon content. In addition to this, bearing steel is designed to have high fatigue strength and life and needs to respond uniformly to the heat treatment process.


High-speed steel

3343, M2, M36 High speed steel

High-speed steel is a subset of tool steels, commonly used in tool bits and cutting tools. It is often used in power saw blades and drill bits. The term “high-speed steel” was derived from the fact that it is capable of cutting metal at a much higher rate than the older high carbon tool steel. High-speed steel continues to cut and retain its hardness even when the point of the tool is heated to a low red temperature.At room temperature, with recommended heat treatment, high speed steels generally display higher hardness and abrasion resistance (linked to tungsten and vanadium content used in high-speed steel) compared to common carbon and tool steels. High-speed steel is considered by many as the toughest of all steel types since it has the ability to cut metals.


Given specialty steel’s resistance to corrosion, fire, and heat, hygienic qualities, aesthetic appearance, strength-to-weight advantage, ease of fabrication, and impact resistance, it is an essential material consumed by a broad range of industries in numerous applications. Jinsili’s specialty steel products are purchased by customers in a variety of industries, such as:

Automotive Industry


Cars are using more specialty steel now, primarily for exhaust system parts, gaskets, air bag inflator housings, windshield wipers and blades, fuel systems, fasteners, power train, structural parts, and many other critical components. Austenitic specialty steels are used by truck manufacturers to produce tanks for food and dairy containment, cryogenic applications, chemicals, and acids.

Electronics Industry


Electronics and communications equipment, including computers, mobile phones, and personal electronic devices, use alloys that have unique electrical, magnetic and corrosion-resistant properties.

Specialty steel is used in offshore, down-hole, and refinery applications. Other material applications support the production of liquefied natural gas, bio fuels, ethanol, gas to-liquid technology, and oil sands recovery. For oil platforms, specialty steel is used for blast walls, cable ladders, and walkways, and also is used in down-hole gas and oil flow systems, including tanks, pipes, pumps and valves.

Oil and Gas Industry


Specialty steel is used in commercial, business, and general aviation aircraft, jet engines, and space vehicles (including satellites, rockets, and missiles). Certain nickel-based alloys and specialty steels are necessary to support the high-temperature effects of oxidation and stress present in critical aerospace environments.

Aviation and Aerospace Industry


Construction Industry


Architecture, building, and construction are growing markets for specialty steel as more buildings are using specialty steel for cladding, roofing, and facades.

Pharmaceutical Industry


Specialty steel meets the stringent specifications this industry requires for internal cleanliness, surface quality, mechanical properties, chemistry control, and corrosion properties. Specialty steel is used by pharmaceutical companies for pill funnels and hoppers and for piping creams and solutions.

Specialty steel is used by general purpose machine shops with multi-axis computerized machine centers to produce intricately machined parts for the oil and gas, aerospace, and power-generation markets, among others.

Machinery and Equipment Industry



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