Quality control at BTC.

At BTC, we try to keep pace with the changing pace of time & technology. We keep ourselves updated with the latest technical innovations & new products. As a result, we are constantly exchanging views with our clients & the outcome is the supply of the most suitable grade of material for a particular application.

Each & every batch of material is thoroughly tested from a NABL ACREDIATED LABORATORY. Both mechanical & chemical tests are thoroughly carried out before dispatch of any material to our clients. Our Inspection Team keeps a constant vigil on the following parameters:
Chemical Analysis: It is thoroughly checked that all the elements are within the required norms. The material is out right rejected if there is any deviation as regards the chemical composition.
Mechanical Properties: Hardness, tensile strength, elongation & yield are tested and compared with the clients’ requirement. The material is dispatched only if the results are satisfactory.
Dimensions: Thickness, width and length (in case of cut length material) are inspected minutely. It is keenly observed, that no dimensions cross the tolerance limit.

Cold formed steel in construction industry.

The use of cold-formed steel structural members in the building and construction industry has
increased rapidly in recent times. Cold-formed steel members have the advantages of being
high strength and light weight and they can be used very efficiently in many applications
where conventional hot-rolled members are uneconomical.

Cold-formed steel members are also used as roof and wall systems of industrial, commercial
and farm buildings, steel racks, plane and space trusses, tubular structures and silos (Hancock,
1994). Although the use ofthinner and high strength steel in cold-formed steel construction
provides a range of advantages, it will cause different failure modes and deformation to those
of conventional thicker hot-rolled steels and therefore separate design codes are required.

High Carbon Steels.

Carbon steels which can successfully undergo heat-treatment have a carbon content in the range of 0.30–1.70% by weight. Trace impurities of various other elements can have a significant effect on the quality of the resulting steel. Trace amounts of sulfur in particular make the steel red-short, that is, brittle and crumbly at working temperatures. Low-alloy carbon steel, such as A36 grade, contains about 0.05% sulfur and melts around 1,426–1,538 °C (2,599–2,800 °F).[8] Manganese is often added to improve the hardenability of low-carbon steels. These additions turn the material into a low-alloy steel by some definitions, but AISI’s definition of carbon steel allows up to 1.65% manganese by weight.

Properties of steel.

Steel derives its mechanical properties from a combination of chemical composition, heat treatment and manufacturing processes. While the major constituent of steel is iron, the addition of very small quantities of other elements can have a marked effect upon the properties of the steel. The strength of steel can be increased by the addition of alloys such as manganese, niobium and vanadium. However, these alloy additions can also adversely affect other properties, such as ductility , toughness and weldability .
Minimizing the sulphur level can enhance ductility , and toughness can be improved by the addition of nickel. The chemical composition for each steel specification is therefore carefully balanced and tested during its production to ensure that the appropriate properties are achieved.
The alloying elements also produce a different response when the material is subjected to heat treatments involving cooling at a prescribed rate from a particular peak temperature. The manufacturing process may involve combinations of heat treatment and mechanical working that are of critical importance to the performance of the steel.