Bar nominal

dia

inch

Cross-

sectional area

in2

Unit mass

App. Lengths

per M. Ton

Kg / m

Feet

Meter

3/8

½

5/8

¾

7/8

1

1 1/8

1 ¼

0.11

0.20

0.31

0.44

0.60

0.79

1.00

1.27

0.376

0.668

1.043

1.502

2.044

2.670

3.400

4.303

0.560

0.994

1.552

2.235

3.042

3.974

5.060

6.403

5,862

3,300

2,113

1,468

1,079

826

648

512

1,786

1,006

644

447

329

252

198

156

Grade 40

Grade 60

Yield Strength min. 

40,000 Psi

60,000 Psi

2,815 Kg / cm2

4,225 Kg / cm2

276 N/ mm2

415 N /mm2

Ultimate Tensile Strength min. 

70,000 Psi

90,000 Psi

4,925 Kg /cm2

6,330 Kg / cm2

485 N / mm2

624 N /mm2

ROLLING TOLERANCE ON MASS (BS 4449 : 1988)

Nominal dia (inch)                                       Tolerance (%)

            3/8                                                                ±  6.5

            ½ & over                                                       ±  4.5

BENDING & REBENDING PROPERTIES

Bend Test

Around a mandrel dia of 2d through 180 °

Rebend Test

Around a mandrel dia of 2d, through 45 °

And reverse bend through 23 °