บทความ
v Size must be measured to meet a specification. Measured in millimeters positive, negative, no more than 2%
v Size and thickness of each line must be equal.
v Sharp angles or curves are not new and the steel seamless.
v Angle, angle or pipe must be measured 90 degrees.
v Round tube to round to the same diagonal measurement all Is not an oval or slit does not close connection.
v Equal-length line All the same color as the bend or twist the test by placing a steel rolling on the floor and try to come more easily noticed.
v Round section line to round round is not 100% Three or poultry is not always the same.
v Deformed bars wavy pattern to draw any clear lines. Pattern does not fall during any one period.
v Standard weight steel deformed bars and round-line
• from 6 mm - 9 mm w / line positive, negative, less than 3%
• 12 mm - 16 mm Weight per line positive, negative, less than 3.7%
• 16 mm - 40 mm Weight per line positive, negative, less than 4.5%
v Standard weight steel.
• If less than 10 kg of weight per line. Weight to the line positive, negative, less than 4.5%
• Less than 50 kg line Weight to the line positive, negative, less than 6.5%
• Less than 100 kg per line Weight to the line positive, negative, less than 9.5%
• Less than 300 kg per line Weight to the line positive, negative, no more than 10.5%
v In case of lack of weight more than the percentage specified. The average before every line. If the percentage had no more than 6% or more to consider that the iron is not standard. (Steel is lighter) If the average error of only 5% percent of the certificate to check. Check with the manufacturer that Certificate is correct. If permitted by the correct specification. But for control leaves Slots attached to produce with
v Specification must be clearly printed on the iron. Specify the trademark (brand) if it is a clear need for a sticker manufacturer's invoice based on the product.
v TIS products leaves only need to check all of these methods. Engineering standards and must be controlled leaf plot with Can actually send it directly to the steel.
v No rust or any other oil coating. In addition to the natural color of steel. If a coating of oil from the plant to some other dark color, not too soft.
v Meat catching steel Must be homogeneous not break like a burr wood. A fragment or the rough fish. Time point to the close links are not broken. Represents the melting point of steel quality.
v After reviewing in detail all of the above then. Buy direct from a store representative of their respective companies. Must be asked. If the product is the problem. Specification or not. Grade B or contamination must be returned in non-standard.
How to buy steel. And observed iron grade A.
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