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مواد اوليه مصرفي
شمش فولادي ، كه منطبق با استاندارهاي CNS,JIS,ASTM,GOST بوده كه مشخصات آن در جدول زير مي باشد
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Chemical Properties of Billets
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As per International Standard/other chemical composition at options.
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Size Range
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Cross Section
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150 mm X 150 mm
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Weight
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175 kg/meter for 150 mm X 150 mm
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Length
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12 meter
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Allowable Variation on Size
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Face Length
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± 3 mm
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Difference in Diagonals
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< 8 mm
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Cut Length
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± 50 mm
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Bending
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Not more than 5 mm in 1 meter
Not more than 30 mm in 6 meter
Not more than 40 mm in 12 meter
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Rhombodity
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Any two adjacent faces to be within 2 degree of a right angle
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Angular Twist
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degree over 12 meter length. (No. twist will be preferable)
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Straightness
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Camber 5mm/meter
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Billet Ends
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Billet ends to be cut at right angles with surface roughness within 2 ~ 4 mm
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Surface Quality
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Free from deep crack (not longer than 20 mm and not deeper than 0.5 mm)
Free from surface pin hole (diameter not more than 4 mm and not deeper than 3 mm)
Free from oscillation mark (not deeper than 0.6 mm)
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Short Length
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Not more than 5% of the total order weight
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