BUREAU OF INDIAN STANDARDS TO IS 2062:2006 …

1 Doc: MTD 4 (4870) For comments only BUREAU OF INDIAN STANDARDS Draft AMENDMENT NO. 2 TO IS 2062:2006 HOT ROLLED LOW, MEDIUM AND HIGH TENSILE STRUCTU...

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Doc: MTD 4 (4870) For comments only

BUREAU OF INDIAN STANDARDS Draft AMENDMENT NO. 2 TO IS 2062:2006 HOT ROLLED LOW, MEDIUM AND HIGH TENSILE STRUCTURAL STEEL (Sixth Revision) ICS 77.140.01 --------------------------------------------------------------------------------------------------------------------------------------------------------------------Not to be reproduced without the permission of Last date for receipt of BIS or used as STANDARD comments is 10 07 2008

Insert the following table below the existing:

Table 1 -

Chemical Composition Grade Designation

Quality

(1) E 550 E 600 E 650

(2)

Ladle Analysis, Percent Max Mn S P

(3)

(4)

(5)

(6)

(7)

Carbon Equivalent* (CE),Max (8)

0.22 0.22 0.22

1.65 1.70 1.70

0.02 0.02 0.015

0.025 0.025 0.025

0.50 0.50 0.50

0.50 0.50 0.52

C

Si

Method of Deoxidation

1)

(9 ) Semi-killed or Killed Semi-killed or Killed Semi-killed or Killed

NOTES Microalloying elements like Nb, V, Ti and B shall be added singly or in combination. Total microalloying elements shall not be more than 0.3%. Alloying elements such as Cr, Ni, Mo and Cu shall be added singly or in combination and shall not be more than 0.5% for E 600 and 0.60% for E 650.

Table 2 -

Insert the following table below the existing: Mechanical Properties

Grade Designation

Quality

Tensile Strength

Rm Min MPa

(1) E 550 E 600 E 650

(2) -

(3) 650 730 780

Yield Stress, R eH Min MPa < 20

(4) 550 600 650

2040

(5) 530 580 630

> 40

(6) 520 570 620

Percentage Elongation

A at Gauge Length, Lo 5.65vSo Min (7) 12 12 12

Internal Bend Diameter Min

< 25

> 25

Charpy VNotch Impact Energy Min J Room Temp -20oC 25 +2 o C

(8) 3.0t 3.5t 4.0t

(9 ) 3.5t 4.0t 4.5t

(10) 25 25 25

(11) 15 15 15

NOTES 1 Bend test not required for thickness 40 mm and above. 2 For Charpy Impact testing, test temperature may be mutually agreed between manufacturer and the purchaser. Otherwise it is at the discretion of the manufacturer to select any one test temperature.

1

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