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20# hot rolled steel sheet

No. 20 round steel belongs to high-quality low-carbon carbon steel, cold-extruded, carburized and hardened steel.

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Steel Round Bars

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Product introduction

(1) Characteristics The steel belongs to high-quality low-carbon carbon steel, cold extruded, carburized and hardened steel. The steel has low strength, good toughness, plasticity and weldability. The tensile strength is 253-500MPa, and the elongation is ≥24%.
The properties of 20 are basically similar to those of 15 steel, but the strength is slightly higher. Uses: suitable for the manufacture of small and medium carburizing and carbonitriding parts that are not important for the construction of automobiles, tractors and general machinery manufacturing, such as handbrake shoes, lever shafts, gearbox speed forks, transmission passive gears and Camshafts on tractors, suspension equalizer shafts, equalizer inner and outer bushings, etc.; used to manufacture various mechanical parts that are not stressed but require high toughness under hot-rolled or normalized conditions; in heavy and medium-sized machinery manufacturing Medium, such as forged or pressed tie rods, shackles, levers, sleeves, clamps, etc. In the steam turbine and boiler manufacturing industry, it is mostly used for pipes, flanges, headers and various fasteners working in non-corrosive media with a pressure of ≤6N/square and a temperature of ≤450℃; used to make crosses on railways, locomotives and vehicles Castings such as heads and pistons.
Normalizing can promote the spheroidization of the steel, refine the massive proeutectoid ferrite, and improve the cutting performance of the blank less than 160HBS.
The process route of the steel die parts is: blanking→forging die blank→annealing→mechanical rough machining→cold extrusion molding→recrystallization annealing→mechanical finishing→carburizing→quenching, tempering→grinding and polishing→assembly.
(2) Delivery state and hardness Unheated state, hardness ≤156HBS.

Technical data

The chemical composition of standard JB/T 6057-92 steel (mass fraction, %)

C	Si	Mn	P	S	Ni	Cr	Cu
0.17~0.23	0.17~0.37	0.35~0.65	≤0.035	≤0.035	≤0.30	≤0.25	≤0.25

Mechanical properties
(5) Phase transition temperature (approximate value) Ac1=735℃, Ac3=855℃, Ar3=835℃, Ar1=680℃
(6) Normalizing specification The temperature is 920~950℃, and the furnace is air cooled. The hardness is 131~156HBS.
(7) Specification for softening treatment of cold pressed blanks The temperature is 700~720℃, the holding time is 8~15h, and the cooling rate is 50~100℃/h, and the temperature drops to 550~600℃ with the furnace, and the furnace is air cooled.
The hardness before treatment is ≤143HBS, and the hardness after softening is ≤131HBS.
(8) Quenching specification Temperature 910℃±10℃, cooling with 10% NaCl brine.
(9) Measured yield strength fy=245Mpa, elastic modulus E=206Gpa, Poisson’s ratio ν=0.3.
(10) The shear strength is 275~392MPa, the tensile strength is 253~500MPa, the yield strength is 275MPa, and the elongation is 25%.
(11) The annealing temperature is only 600-650 degrees, and the holding time is 1-2h.

Our services of our round bar :

1. If you find any quality problem after receiving the goods, you can contact with us, we will manage and reply you in 12 hours

2.We are a factory manufacturing SS Round bar,best production capability ,best quality control, Best Service .

3.Inspected by the Inspection Institution of SGS or ISO

4.100% QC inspection Before Shippment.

If you have any questiond Plesse contact us in time.

Warehouse Storage

TIANYI Steel (Shandong) Co., Ltd. is located in the beautiful Shandong Province. With the continuous development of business, the company's business scope continues to expand. The company has a group of professional sales staff to provide customers with high-quality services. The company is committed to providing customers with high-quality, low-cost steel products. We have won the trust and praise of our customers with our commitment and quality-oriented service concept.

Packing and shipping

Our main products include: carbon steel plate, carbon steel pipe, color-coated sheet/coil, galvanized sheet/sheet tube/coil/corrugated sheet/plate steel (I-beam channel steel H-beam), long product, galvanized pipe, Welded pipe, gas pipe, spiral pipe, plate, thread, wire, automobile flat steel, etc. The stock of each specification is sufficient. And it is an excellent distributor of Chinese state-owned enterprises: Baosteel, Baotou Steel, Anshan Iron and Steel, Baotou Iron and Steel, and other national iron and steel enterprises.

Application field

Our advantage is to integrate market information, quickly find the products you need, provide high-quality price concessions, one-stop service, and provide you with products accurately and quickly. We always adhere to the tenet of "quality first, customer first, high-quality service, honesty and trustworthiness". With high-quality products, good reputation and high-quality service. We are committed to win-win cooperation with domestic and foreign merchants. We look forward to common development and create brilliance together. Feel free to contact our team to experience supreme service and quality products. Looking forward to working with us.

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FAQ

Q1:Can you send samples?

A:Of course, we can provide customers with free samples and express shipping service to all over of the world.

Q2:What product information do I need to provide?

A:Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase.

Q3:It's my first time to import steel products, can you help me with it?

A:Sure,we have agent to arrange the shipment, we will do it together with you.

Q4:What about product prices information?

A:Prices various according to periodic price changes of raw materials.

Q5:What ports of shipment are there?

A:Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can specify other ports according to your needs.

Q6:What is your terms of payment ?

A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment or based on BL copy or LC at sight.

Q7.Do you provide custom made Products service?

A: Yes,if you have your own design , we can produce according to your specification and drawing.

Q8:What are the certifications for your products?

A:We have ISO 9001, MTC, third parties’ inspections are all available such SGS, BV ect.

Q9:How long does your delivery time take?

A:In general, our delivery time is within 7-15 days, and may be longer if the quantity is extremely large or special circumstances occur.

Q10: How many countries you already exported to?

A:We have exported to America, Canada, Brazil, Chile, Colombia, Russia, Ukraine, Thailand, Myanmar, Vietnam, India, Kenya, Ghana,somalia and other African countries.Our export experience is rich, we familiar with different market demands, can help customers avoid a lot of trouble.

Steel Round Bars