Plain Round Bar

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Specifications of High Quality Round Bar

1. Grade: GB, JIS, ASTM, EN

2. Grade: Q235, SS400, A36, S235JR

3. Diameter and mass: As below

Diameter

Mass

Diameter

Mass

Diameter

Mass

(mm)

(kg/m)

(mm)

(kg/m)

(mm)

(kg/m)

6

0.22

22

2.98

53

17.30

7

0.30

24

3.55

56

19.30

8

0.40

25

3.85

60

22.20

9

0.50

26

4.17

63

24.50

10

0.62

28

4.83

65

26.00

11

0.75

30

5.55

70

30.20

12

0.89

32

6.31

75

34.70

13

1.04

34

7.13

80

39.50

14

1.21

36

7.99

85

44.50

15

1.39

38

8.90

90

49.90

16

1.58

40

9.86

95

55.60

17

1.78

42

10.90

100

61.70

18

2.00

45

12.50

120

88.85

19

2.23

48

14.20

140

120.93

20

2.47

50

15.40

150

138.82

4. Material: Mild Steel

5. Heat treatment of high quality steel:

Fire: Isothermal annealing temperature is 800 ~ 880 °C, with 10 ~ 20 °C, the furnace cooling to about 600 °C, hardness above HB269.

Preheat temperature: 730-730 °C

Quenching temperature: 1190-1210 °C

Tempering temperature: 540-595 °C

Cold drawn, hardness 285 HBS

Cold drawn after annealing condition, hardness 277 HBS

Quenching methods: oil quenching, air cooling or salt bath quenching

Usage and Applications of High Quality Round Bar

1) Suitable for making various strong cutting tool abrasion resistance, impact resistance.

2) Used to produce all kinds of high hard and super hard saw blade, drill, tap, broach, gear hob and various kinds of milling cutter.

3) Used for advanced punching die, screw die, and the toughness and complicated shape of the punch, etc.

4) Is used for cold forging die and drawing mode, etc.

5) Recommended watchcase factory, screw factory and other cold stamping products industry use.

Packaging & Delivery of High Quality Round Bar

Packaging Detail: All goods are packed in bundle with steel strips and shipped by break bulk vessel or container (depend on target market and different ports)

Delivery Detail: 45 days

Trade terms: FOB, CFR, CIF

MOQ: 25 tons per specification; we can negotiate the quantity if the specification is normal or we have stock of one specification.

Weight: The price invoicing on theoretical weight basis or actual weight basis depends on customer’s request.

Shipment: The shipment of bulk break or container is depends on customer’s request and the situation of the port of destination.

Documents given: Full set of original clean on board bill of lading; Original signed commercial invoice; Original packing list; Policy of insurance; Certificate of origin and what the target market needs.

Production Flow of High Quality Round Bar

The common processes are preheated forging quenching, dual refinement solution process, cooling quenching and isothermal quenching. We use heat treatment for dual refinement solution process. The main measures process is high temperature solution and refinement cycle. High temperature solution can improve the carbide morphology and particle size. The aim is to make the loop refinement ultrafine austenite grains.


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Q:Why is round steel more expensive than thread steel?
Threaded steel should be used in the construction field, there are generally two, three grade steel, grade HRB335, HRB400 also has four grades, HRB500 thread steel. Steel is divided by tolerance standard of gb. You say there is no comparable price between round bar and screw thread
Q:Difference between round bar and other steel bars
It is divided into three kinds: hot rolling, forging and cold drawing. Round steel (grade 1 steel) belongs to ordinary low carbon steel, and most other steel bars are alloy steel. Round steel is of low strength and high strength of other steel.
Q:What are the main differences between wrought round steel, hot rolled round steel and cold drawn round steel? Where are they used separately?
Round steel three processing methods are more common, should be very wide surface. Hot rolled round steel, used in construction and general hardware parts processing is very common.
Q:12 of the diameter of the round steel can be M12 out of the thread is not
It depends on your material straight straight, generally should be right, you check the metric thread specification table, there is large size can be much, I think you are a little round a little better, so that you may get the car, do not appear to have a side material shortage phenomenon
Q:Is steel bar round wire? What's the difference? What are the main applications of wire rod?
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:How is the copper wire and galvanized round steel connected during the construction of the lightning protection device?
Copper wire and galvanized steel bars can be directly welded together, do not pay attention to;Lightning protection device refers to the lightning receiver, the lead wire, grounding device, surge protector (SPD) and other connected conductor sum.
Q:Q235 and mechanical properties of hot rolled steel cold drawn steel have what difference, Q235 hot rolled steel with 12 combined shearing machine has a number of very hard, the damage of the blades, why
First of all, Q235 refers to the yield strength, is a heat treatment method, commonly used in thin steel plate material,
Q:Why is the round bar bent?
Gripping force: generally expressed by the strength of the concrete.Physical quantity of reinforced concrete to resist sliding ability, its sliding force divided by the holding area to express (Mpa), under normal circumstances, the bond strength is along the steel and concrete interface shear stress, which is the bond stress.
Q:20 round bars are of several grades
20 round bars may be grade two steel.
Q:Why do I use the M25 round bar for the embedded bolt M24?
Such as using 24 of the round steel, worried about the surface quality of steel when the processing can not be nominal diameter 24 of the standard thread, of course, the election is too large and wasteful, so generally choose 25 of the round bar,

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