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Сold-deformed reinforcing steel B500C for concrete construction reinforcement

Normative documents
TU U DP 24.3-02070766-002:2015
DSTU EN 10080:2009
EN 10080; ISO 10544


Steel grade
 St1kp, St1ps, St3ps are according to DSTU 2770-94;
1006, 1008, 1018 are according to SOU MPP 77.140-236; C4D, С7D, C18D are according to DSTU EN 10016.



Application
The high level of strengthening characteristics (σ0,2≥ 500 N/mm2, σв≥ 550 N/mm2) allows to apply rolled steel according to current TU mutually and instead of the other classes of wire and bars reinforcing of rated diameters, including. A- I … A-III in accordance with GOST 5781-82; At500C and At400C in accordance with GOST 10884-94, and also reinforcing wire of a class of VP-1 (GOST 6727-80).
Furthermore, applying of reinforcing steel class B500C of rated diameter instead of other classes stated above is performed without conversion of reinforcing and coordination with project organizations that is an important factor of production costs reduction and increasing of reliability of steel reinforcement concrete of constructions objects. For the reinforcement of tensile strength 500, the introduction of intermediate sizes in range from 5,5 to 12 mm allows to save steel up to 16% and to solve the problem of interchangeability of working (estimated) reinforcement of one tensile class with reinforcement of the other class.
Rolled steel according to the current TU U DP 24.3-02070766-002:2015 is intended for reinforcement of steel concrete constructions in standard industrial floors, strip foundations, roadway paving, operated in the open air, in heated and not heated locations.



Diameter

4,0 - 8,0 mm

Cold-formed reinforcing steel B500C for concrete construction reinforcement with three-sided die-rolled section of diam. range 4,0mm up to 8,0mm is produced from carbon steels of general purpose, and has tensile strength min. 500N/mm2.
Advanced manufacturing technology of reinforcement class B500C implemented on “DNIPROMETYZ TAS” LLC allows to produce steady reinforcement with required characteristics in the range from 4,0 to 8,0mm, with any intermediate diameter.
Technical characteristics

Nominal diameter, dн, mm

Rated cross-section area FH, mm2

Rated weight 1m length m, kg

Permitted weight deviations 1m length % %

4,0

12,60

0,099

± 4,5

5,0

19,63

0,154

6,0

28,27

0,222

7,0

38,50

0,303

8,0

50,26

0,395

Note : Weight of 1 running meter is calculated proceeding from rated steel density (7,85g/cm3)

The reinforcement is supplied with accurate rolling marking – stamping a trademark “DM” of the manufacturer PrJSC “Dneprometiz” on one side of the profile.

Main geometries of the reinforcing steel

Profile number (nominal diameter) mm

Height of lug h, mm

Pitch of lug с, mm

Relative pitch of lug с/b, not less

Total interval between ends of transverse ribs ∑e, mm, max

Relative area of profile’s transverse ribs deformation fR, not less, mm

Ovality of rolling, mm, max

4,0

0,20-0,40

1,6-4,0

3

3,14

0,036

0,5

5,0

0,25-0,50

2,0-5,0

3,93

0,039

0,5

6,0

0,30-0,60

2,4-6,0

4,71

0,039

1,0

7,0

0,35-0,70

2,8-7,0

5,50

0,045

1,0

8,0

0,40-0,80

3,2-8,0

6,28

0,045

1,0

 Slope angle of transverse rib β = (35-60)°.Slope angle of lateral surface of transverse rib α=(45-60)°
Mechanical and technological properties

Description and properties

Value index

Allowed probability of assurance

Not less

Conventional yield strength , σ0,2, МPa

500

0,90

Tensile strength σв, МPа

550

0,95

Ratio σв0,2

1,05

0,95

Total relative elongation at maximum stress, Аgt, %

2,5

0,90

Quantity of bends on 180 degrees round arbor of diam.3dн:

-for rolling of rated diameter 4,0-4,5mm

-for rolling of rated diameter 5,0-5,5mm

4

5

-

Rolling of rated diameter 6,0-8,0 mm should pass bending test on angles

180 and 90 degrees respectively round arbor of diameter equal 3dн.

Absence of fractures

 and cracks

-

Overall dimensions and weight of coils

Type of shipment

Weight, kg

Inner diameter

Outer diameter

Height

Heavy-weight coil

550±50

950±50

1950±100

2950±100

650±10

450±10

500±10

620±10

830±20

830±20

960±20

1050±20

440±20

440±20

650±20

840±20

When forming a transport package in bars, each package is tied tightly in three places by wire rod of diameter 5,5 - 8,0mm. On each coil or package at least two clamps are fasten for fixing the strops of crane mechanisms providing the mechanized loading and unloading of the goods.

Delivery

Coils of weight up to 3000 kg

Bars length (L) from 1,0 up to 6,0 m.,  package of weight up to 300 kg.