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Tel : +86 18615692579 Email : sales5@yinghaometal.com

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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.

Classification :

Steel Round Bars

+86-18615692579

sales5@yinghaometal.com

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PRODUCT DETAILS

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.

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Factory appearance and appearance

The company mainly engaged in steel production, sales and other businesses. The main products include all kinds of steel plate, steel pipe, bar, profile and other materials and section steel. At the same time is a number of domestic large steel mill level agents, with a certain price advantage.

Packing and delivery

For many years, the company has been established, adhering to the purpose of "respecting contract, keeping faith, customer first, reputation first, quality first", adhering to the customer demand as the center, to "achieve what customers think, think what customers think" business philosophy, to "one sale, small profit, real price, timely delivery" business principle, we manage all kinds of specifications and materials of steel pipe and profile for customers.

Application field

The main supply fields are: aerospace, national defense equipment, military weapons, chemical industry, shipbuilding, nuclear energy, trains, containers, environmental protection, precision machining, auto parts, machinery, electronic products, molds, medical treatment Equipment, construction, decoration, etc.

Customer Visit Feedback

Over the years since its establishment, the company has been adhering to the purpose of "honoring contract, keeping faith, customer first, reputation first, quality first", adhering to the customer demand as the center, to "reach customer think, think customer think" business philosophy.

CERTIFICATE OF HONOR

WELCOME TO INQUIRE

The company guarantees the quality of its products with its strong financial strength, advanced management experience and strict quality control system for incoming goods. Excellent products and good reputation are well-known all over the country, and have won the trust and support of major steel mills and customers. Welcome to inquire, negotiate or visit our company in person. Welcome to inquire, negotiate or visit our company in person.

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FAQ

Q1:Will you offer samples?

A:Yes. We will provide samples according to your needs and send them out within three days after receiving payment.

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:Do you have the products in stock?

A:We have the products in stock. Also, we can produce for your order.

Q5:Do you offer after-sales services?

A : Of course. We have a perfect after-sales service system, if you have any questions, please feel free to contact us. We will do it to your satisfaction.

Q6:What kind of work does your company do?

A:Our company is a professional manufacturer. We mainly produce stainless steel plate/coil/round rod, carbon steel plate/coil,galvanized plate/coil, PPGI coil, roofing sheet and so on.

Q7:What are the advantages of your company？

A : We have international advanced production equipment, large factory buildings, strong company strength, perfect products and reliable quality.

Q8 : Are you a factory or trading company?

A : We are a professional steel factory with many years of experience, perfect manufacturing process, quality assurance!

Steel Round Bars