Circular Hollow SECTION

STEEL TUBE FOR STRUCTURAL PURPOSES

TOLERANCE

A) OUT SIDE DIAMETER :-

1. UPTO & INCLUDING 48.3 MM = +0.4 MM/ -0.8 MM

2. OVER 48.3 MM = ±1.0 %

B) THICKNESS (FOR ALL SIZES) :-

1. WELDED TUBES : ±10%

C) WEIGHT : -

1. SINGLE TUBE : ±10 %

2. 10 TONNE LOTS : ±7.5%

TENSILE PROPERTIES

S.NO. GRADE Y.S (Min.)MPa T.S (Min.)MPa ELONGATION%
1 Yst 210 210 330 20
2 Yst 240 240 410 17
3 Yst 310 310 450 14
4 Yst 355 355 490 10

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