Tuesday 19 March 2013

Steel Bars

These bars can be made out of a few different materials each of which contain different properties & thus are used for different purposes. Carbon Steels are usually used for Structural Shapes, Pipes, Plates & Tubing. High Strength Low Alloy steels are used for the same as Carbon but also W Shapes. Corrosion Resistant High Strength is only used for Structural Shapes & plates whereas Quenched & Tempered Alloy Steels are used for Structural Plates, Plates & Boilers & Pressure Valves.

Angle Steel Bars are a kind of structural steel which are L formed. Other forms include the T beam, Z shape, Channel, T formed, Bar, Rod, Plate, & Asymmetrical I Beams.

The Thermal Properties of Steel vary depending on the composition of the Alloy, i.e. the substances other than iron that are used to form the steel. The Autenizing temperature which is the temperature at which the steel becomes a crystal structure is used to compare different alloys. Pure Iron has an Autenizing temperature of 900 Centigrade, Eutectic is far lower, this has less than 1% Carbon & when more carbon is added, this temperature will increase again. When the Carbon levels are above two.1%, the name of the substance is no longer steel but Cast Iron.

The composition of the steel involved also changes the properties of the material. Often coatings are applied to steel to try to increase the Critical Temperature which is the temperature in which the steel is unable to bear its load. This is important in cases of fires where injuries to persons or items may happen as the steel will no longer be able to provide the mechanical strength.

There's a few makes use of for Angled Steel & they are usually Structural, the steel helps provide a force to hold items in place. Therefore it is imperative that the angle produced is so exact & various calculations are used to make positive that this is the case. There's lots of different companies obtainable which can offer specialised cutting allowing the exact size & angle to be formed for different needs.

There's number of ways in which Steel can be twisted including Press Brake Forming, Point Bending, Folding, Wiping, Rotary Bending, Elastomer Bending & Running. There's types of Press Brake Forming & these are Air Bending, Bottoming & Coining & in all of these a punch provides the force necessary for bending the steel.

Wednesday 9 January 2013

History of the development of hot-dip galvanizing



 Hot dip galvanized (galvanizing), also known as hot-dip galvanized and hot-dip galvanized: it is an effective anti-corrosion of the metal, mainly used in the metal structure of the industry facilities. The rust steel immersed in liquid zinc melt around 500 , steel members attached to the surface of the zinc layer, which play the purpose of anti-corrosion . Hot-dip galvanizing process: finished pickling - washing - plus help the bath - drying - hang plated - cooling - Pharmaceutical - cleaning - polishing - hot galvanized completion. Corossion is one of the chronic metal disease that destroys the metals gradually.

The hot-dip galvanizing is evolved by ancient Redu, has 140 years of history since 1836, France had been used in industrial hot dip galvanized. However, hotdipped galvanized steel pipe manufacturer in the past three decades along with the rapid development and large-scale development of the cold-rolled steel strip. Galvanizing process not only makes metal an anti corrosive but helps in providing strength as well as increases the life span of metals.

Monday 7 January 2013

ASTM PIPE



 Services of ASTM International. Use of standards. Annual book of ASTM 

 ASTM PIPES
 These ASTM standards define the specific manufacturing process of the material and determine the exact chemical composition. Most of hot dipped galvanized steel pipe manufacturer keeps this standard for fittings and flanges, through percentages of the permitted quantities of carbon, magnesium, nickel, etc., and are indicated by "Grade".

 For example, a carbon steel pipe can be identified with Grade A or B, a stainless-steel pipe with Grade TP304 or Grade TP321 etc..
Below you will find as an example a table with chemical requirements for fittings ASTM A403 Grade WP304, WP304L, WP316L and a table with frequent Grades, arranged on pipe and pipe-components, which belong together as a group.
ASTM Pipe
1:Out Dimesions:1/2"-24"
2:Thickness:SCH10-SCH160
3:Standard:ASTM A53 GR.B ,/A106/A178/A179/A192/A210/A213/A333/
A335/A283/A135/A214/315/A500/A501/A519/A161/A334 ect.
4:Surface Treatment: painting or according to customers' requirement
5:Length:<=12M
6:Advantage:can be manufactured by customer requirement
Packing & Delivery Details: 
1:Packing Detail: Export standard packing or according to customers' requirements 
2:Delivery Detail: Within 20-30 days after the receipt of T/T or L/C.