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Precision Rolled Threaded Steel
Prestressed Concrete Thread Bar are further rolled by a high-precision rolling mill on the basis of hot-rolled ribbed steel bars. They have fine-rolled threads on their surface and can be closely matched with anchors, connectors, etc. They are mainly used for prestressed construction of large concrete structures. Prestress is applied by tensioning, and the elastic retraction of the steel bars is used to generate pre-compressive stress on the concrete, thereby improving the crack resistance, durability and bearing capacity of the concrete structure.
The implementation standards for finished rolled rebar are mainly based on GB/T20065-2016, which specifies in detail the category and definition, strength grade, size and shape and allowable deviation, technical requirements, test methods, inspection rules, packaging marks and quality certification of finished rolled rebar. The marking of steel bars shall comply with the following provisions: The end shall be painted according to the strength level, as follows: PSB785 is not painted, PSB830 is painted white, PSB930 is painted yellow, and PSB1080 is painted red.
ADVANTAGES
Characteristics of Prestressed Concrete Thread Bar:
High strength: high yield strength and tensile strength, stable and reliable quality. Common strength grades include PSB785, PSB830, PSB930, PSB1080, etc., which can meet the needs of different large-scale projects.
High precision: high dimensional accuracy, uniform thread specifications, regular tooth shape, ensuring the reliability and construction accuracy of connection with anchors.
Good machinability: good cold bending and welding performance, convenient for cutting, bending and connection at the construction site. Save steel bars, reduce component area and weight.
Strong adaptability of connection method: simple connection and anchoring, strong adhesion, safe and reliable tension anchoring, and convenient construction.
High corrosion resistance: generally surface anti-corrosion treatment is carried out, such as galvanizing, plastic coating, etc., which can effectively resist external environmental erosion and extend service life.
USE
Prestressed Concrete Thread Bar can be directly matched with special nuts for anchoring, without welding or threading, and has a tensile strength of 835MPa~1230MPa, which is more than 30% higher than ordinary rebar (HRB500 grade about 630MPa), and is suitable for lifeline projects that require long-term stable load-bearing or dynamic loads.
SPECIFICATIONS
Specifications of precision rolled threaded steel:
Prestressed concrete rebar is divided into grades according to yield strength, and its code is "PSB" plus the specified minimum yield strength. P, S, and B are the first letters of Prestressing, Screw, and Bars, respectively. For example: PSB830 represents a steel bar with a minimum yield strength of 830 MPa.
PSB500, PSB785, PSB830, PSB930, PSB1200, PSB1080/15mm, 20mm, 25mm, 28mm, 32mm, 36mm, 40mm, 50mm, 75mm and other specifications of precision rolled threaded steel.
Product Parameter:
Product Parameters | |||
Nominal Diameter / mm | Level | Nominal cross-sectional area / mm2 | Theoretical weight kg/m |
Φ15 | PSB830 | 177 | 1.4 |
Φ20 | PSB500 | 314 | 2.47 |
Φ25 | PSB500 / 830 / 930 / 1080 | 491 | 4.1 |
Φ32 | PSB830 / 930 / 1080 | 804 | 6.65 |
Φ36 | PSB830 / 930 / 1080 | 1080 | 8.41 |
Φ40 | PSB830 / 930 / 1080 | 1257 | 10.34 |
Φ50 | PSB830 / 930 / 1080 | 1963 | 16.28 |
PACKAGE
We support customized packaging.
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