Round Bars

Depending on rolling accuracy round bars can be:

• A – high accuracy;
• B – advanced accuracy;
• V – standard accuracy.

The diameter, its limit deviations, cross section and weight per 1 meter should correspond to the table data.

Bar bending should not exceed the values, shown in the table.

Steel density used in calculations per 1 meter of a rolled product is 7.85 tons/m3. On request round bars can be manufactured with the following positive deviations, shown in the table.

Out-of-roundness of a round bar should not exceed 50% of the sum of diameter limit deviations. For alloy tool steel and high-speed steel products the allowable out-of-roundness is not more than 60% of the sum of diameter limit deviations. Rolled products with diameter up to 9 mm are supplied in bundles, over 9 mm – in rods.

On request the products are made of the following length:

• Gauge length;
• Multiple gauge length;
• Multiple off-gauge length.

The bending is measured at the length not less than 1 m and not less than 150 mm from the bar edges. Out-of-roundness of a round bar is measured at not less than 150 mm from the bar edge and not less than 1.5 m from the bundle end, if the bundle weight is up to 250 kg, or not less than 3.0 m, if the bundle weight is over 250 kg.