Steel Round Bar Reliable Manufacturer from China

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Loading Port:
Lianyungang
Payment Terms:
TT OR LC
Min Order Qty:
221 m.t.
Supply Capability:
200334443 m.t./month

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Product Description:

Description of steel round bar:

1. Commodity: Round steel bar 

3. Technical: Hot rolling 
2. Length: Min. 5.8meter, according to requirement.
3. Diameter: 16mm-250mm

5. Packing: In Bundle or according to your requirements.


Festures of steel round bar:

1.Dia 80-800mm Length:2000-13000mm or as required 
2.Technique:Forged 

3. Annealing after forging:heat to 840-860°c,keep 2-4H,coolbelow to 500°c,hardness≤285HBS. Isothermal annealing after forging:heat to 540-860°c,keep temperature 2-4H,furnacecold to 740-760°c,keep temperature 4-6H,to 500°c,hardness≤255HBS.


Specifications of steel round bar:

1. Standards:  AISI 4340 8620 8640 4320 , JIS SNCM8  GB:40CrNiMoA 

2. Specification: Dia: 80~450mm  Length:2000-13000mm or as required

3. Process:  EAF+LF+VD ( necessary)    UT+ Peeled +Turned + Heat Treatment (optional)

4. Chemical Composition (%):

C

Si

Mn

S

P

Cr

Ni

Cu

Mo

0.37-0.44

0.17-0.37

0.40-0.80

0.025(max)

0.025(max)

0.60-0.90

1.25-1.65

0.025(max)

0.15-0.25

 

Images of steel round bar:

Steel Round Bar Reliable Manufacturer from China

FAQ:                                               

1. What is your package?

Packing situation: standard seaworthy packing or as customer required.

2. How long is the lead time?

Delivery time: 45 days after order confirmed.

3. What  payment term do you accept?

Payment: T/T or L/C at sight.

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Q:What kind of nuts do you need for round 20 rounds?
Common materials for 301, 304, 303, 316, 316L, 304L, 321, 2520, 201, 202 and so on. Specifications are expressed in diameter, such as "50", which means a round bar of 50 millimeters in diameter. Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm.Stainless steel round bar has a broad application prospect, and is widely used in hardware, kitchenware, shipbuilding, petrochemical, machinery, medicine, food, electricity, energy, aerospace and other architectural decoration. Equipment, chemicals, dyes, paper making, oxalic acid, fertilizer, etc.; equipment for photography, food industry, coastal areas, ropes, CD poles, bolts, nuts, etc..
Q:How many positive and negative tolerances are allowed for round steel GB?
Round steel is a solid strip of steel whose cross section is round. The specifications are expressed in millimeters of diameter, such as "50", which means a round bar of 50 millimeters in diameter. Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Among them, 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts. They are more than 25 millimeters of round steel. They are mainly used in the manufacture of mechanical parts or seamless steel tube billets
Q:What is the difference between 40Cr round steel and 40Cr steel forgings?
The casting process constructed a fine grain structure and improved the physical properties of the metal. The utility model has the advantages of high strength and good plasticity, and is suitable for making important parts with large force and high requirement.The properties of forgings are superior to those of ordinary ones.
Q:Difference between forging and round steel
The advantages of a casting include an extensible length, a contracted cross section, a contracted length, an extended cross section, a variable length, and a variable cross section. The types of casting are free forging / hand forging, hot die forging / precision forging, top forging, roll forging and die forging.Forgings are not limited to round shapes.Round steel is a solid strip of steel whose cross section is round. The specifications are expressed in millimeters of diameter, such as "50", which means a round bar of 50 millimeters in diameter.Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Of them: 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts. They are more than 25 millimeters of round steel. They are mainly used in the manufacture of mechanical parts or seamless steel tube billets.
Q:Grade 1 steel is round steel, grade two steel is ribbed thread steel. Are the weight of the two units the same?
Grade two steel is ribbed steel, but the average diameter is calculated. The chemical composition of grade steel and grade two steel is different, but the density of them is the same. Therefore, the unit weight of grade 1 steel and grade two steel is the same.
Q:Excuse me and steel disc round what is the difference?
Round steel is a solid strip of steel whose cross section is round. Its specifications are expressed in diameter, in units of millimeters (mm), such as "50mm", which means a diameter of 50 millimeters of round steel. Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Where: 5.5-25 mm small round steel mostly straight bundles of supply, used for steel, bolts and various mechanical parts; greater than 25 mm round steel, seamless steel pipe is mainly used for the manufacture of mechanical parts of the tube, etc..
Q:What kind of material is the first round steel?
Standard Specification for hot rolled round steel is 5.5-250 mm. Where: 5.5-25 mm small round steel mostly straight bundles of supply, used for steel, bolts and various mechanical parts; greater than 25 mm round steel, seamless steel pipe is mainly used for the manufacture of mechanical parts of the tube, etc..
Q:Difference between cold drawn round steel and round steel
The free torsion rigidity of hot rolled steel is higher than that of cold rolled steel, so the torsion resistance of hot rolled steel is better than that of cold rolled steel.
Q:Is steel bar round wire? What's the difference? What are the main applications of wire rod?
Round steel is a solid strip of steel whose cross section is round. The specifications are expressed in millimeters of diameter, such as "50", which means a round bar of 50 millimeters in diameter.
Q:What is the difference between gcr12 round bar and Cr12 round bar? Can it be used in general?
The two are different in chemical composition.Cr12 is a widely used cold work die steel. It has high strength, good hardenability and good wear resistance, but its impact toughness is poor. The content of Cr was 11.50 ~ 13. The utility model is mainly used for cold punching dies and punches, cold cutting shears, drill sleeves, gauges, wire drawing dies, coining dies, drawing dies, drawing dies and thread rolling dies, which have the advantages of small impact load, high abrasion resistance, and high abrasion resistance.

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