20# carbon structural steel

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Product information

Brand: 20#
The 20 of No. 20 steel refers to the carbon content of 0.2%, which is low carbon steel. Steel can be divided into low carbon steel, medium carbon steel and high carbon steel.
Carbon content: low carbon steel is generally less than 0.25%; Medium carbon steel is generally between 0.25 and 0.60%; High carbon steel is generally greater than 0.60%.
In addition to containing carbon (C) element and containing a certain amount of silicon (Si) for deoxidation (generally not more than 0.40%), manganese (Mn)(generally not more than 0.80%, higher up to 1.20%) alloying elements, does not contain other alloying elements (except residual elements).
Usually the carbon content of less than 0.02% is called wrought iron, greater than 2.11% to 4.3% is called pig iron, and the middle is steel.
(1) Characteristics The steel is a high-quality low-carbon carbon steel, cold extruded, carburized hardened steel. The steel has low strength, good toughness, ductility and weldability. The tensile strength is 253-500MPa, and the elongation is ≥24%.
The characteristics of 20 are basically similar to those of 15 steel, but the strength is slightly higher. Application: Suitable for manufacturing cars, tractors and general machinery manufacturing to build less important small and medium-sized carburizing carbonitriding and other parts, such as handbrake shoe on the car, lever shaft, transmission speed fork, transmission passive gear and tractor camshaft, suspension equalizer shaft, equalizer inside and outside bushing; It is used in hot rolling or normalizing state to manufacture various mechanical parts with little force and high toughness. In the heavy and medium-sized machinery manufacturing industry, such as forged or pressed tie rods, carabiners, levers, sleeves, fixtures, etc. In the steam turbine and boiler manufacturing industry, it is mostly used for pipes, flanges, header and various fasteners working in non-corrupting media with pressure ≤6N/ square and temperature ≤450℃; In railway, rolling stock for the manufacture of cross head, piston and other castings.
Normalizing can promote spheroidization of the steel, refine large block proeutectoid ferrite, and improve the cutting performance of blank less than 160HBS.
The process route of the steel die parts is: blanking → forging die blank → annealing → mechanical roughing → cold extrusion forming → recrystallization annealing → mechanical finishing → carburizing → quenching, tempering → grinding and polishing → assembly.

Product parameter

Chemical composition
Carbon (C) : 0.17%~0.24%
Silicon (Si) : 0.17%~0.37%
Manganese (Mn) : 0.35%~0.65%
Sulfur (S) : ≤0.035%
Phosphorus (P) : ≤0.035%
Chromium (Cr) : ≤0.25%
Nickel (Ni) : ≤0.25%
Copper (Cu) : ≤0.25%
Mechanical property
Tensile strength σb (MPa) : ≥410(42)
Yield strength σs (MPa) : ≥245(25)
Elongation δ5 (%) : ≥25
Section shrinkage ratio ψ (%) : ≥55
Hardness: No heat treatment,≤156HB
Sample size: 25mm

Product display

COMPANY PROFILE




Shiyu Metal Material Technology Co., Ltd. is a collection of procurement, processing, agent, sales, logistics, warehousing in one of the enterprises, the company has a large-scale spot supply base in China, with domestic and foreign large steel mills and suppliers to maintain good relations of cooperation, with a full range of multi-channel procurement resources.
Shiyu Metal main products: nickel base alloy, Hastelloy, super austenitic stainless steel, duplex stainless steel, cobalt base alloy, pure nickel, titanium and titanium alloy, heat resistant, corrosion resistant alloy and other kinds of steel, a large number of product categories, can meet the size and thickness customization, prefabrication and other diversified needs.
The company has ISO9001 quality certification, the company's product standards include: the United States (UNS) ASTM /ASME, AMS, German DIN/EN, Japan (SUS) JIS and other standards supply, provide the original material certificate. We can supply according to the standards and technical requirements provided by customers to ensure that the goods and specifications are complete to meet the needs of various merchants. From raw materials to finished products, all go through three quality inspection to ensure the qualified rate of finished products. Shiyu Metal strives for perfection in every detail to ensure that the quality of products in different countries and regions around the world can meet international standards. Shiyu Metal has established a good strategic cooperative relationship with the world famous steel mills such as HAYNES, ATI, SPECIALMETALS, VDM, OUTOKUMPU, Japan Metallurgy, Nippon Steel, and Datong Special Steel.
The products supplied by Shiyu Metal are widely used in nuclear power, petrochemical, mechanical engineering, precision processing, aerospace, electronic instruments, medical equipment, automobile manufacturing, environmental protection, wind power application, seawater desalination, shipbuilding industry, paper making machinery, mining engineering, cement manufacturing, metallurgical manufacturing, corrosion resistant environment field, high temperature environment field, mold field, etc. It is a global high-quality supplier of special steel materials.
Shiyu Metal Material Technology Co., Ltd. is committed to the purchase, agent and sales of special steel, and has a perfect special steel sales management system and product quality supervision system. The company has been adhering to the "integrity, innovation, responsibility, win-win" business philosophy, adhere to the "quality first, customer first" service purpose, to provide customers with quality services and high-quality steel products. Shiyu Metal actively participates in the development of domestic steel industry ecology, and is willing to contribute to the development of national special steel.



ENTERPRISE ADVANTAGE




SERVICE

From steel procurement, processing, logistics, warehousing, 
Shiyu Metal has a perfect management system, tailor-made solutions for each customer, strictly control each link, to ensure safe, efficient and accurate product delivery to customers;




RESOURCE

Shiyu Metal maintains good cooperative relations with medium and large steel mills and suppliers at home and abroad, 

and has established good strategic cooperative relations with world famous steel mills such as the United States, Germany, Finland and Jap.




SCALE

Shiyu Metal set procurement, processing, agency, sales, logistics, 

warehousing in one, can provide customers with steel products procurement, processing, logistics and other one-stop services.




PRODUCT

Shiyu Metal operates a wide range of steel products, can provide customers with product size and width customization, prefabrication and other services, perfect product quality supervision system, to ensure high standards of product quality, high quality.