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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