Element

Heat Analysis, %

Product Analysis, %

Carbon:

     For sizes through 1 ½” in.

0.30 to 0.53

0.28 to 0.55

     For sizes larger than 1 ½” in.

0.35 to 0.53

0.33 to 0.55

Phosphorus, max

0.035

0.040

Sulfur, max

0.040

0.045

Hardness

Size, in.

Grade

Brinell

Rockwell C

Minimum

Maximum

Minimum

Maximum

¼ to 2 ½

BC

255

331

26

36

Over 2 ½

BC

235

311

22

33

¼ to 2 ½

BD

311

363

33

39

Over 2 ½        

BD

293

363

31

39

Grade

Size, in.

Tensile Strength min, psi (MPa)

Yield Strength (0.2 % offset), min, psi (MPa)

Elongation in 2 in. or 50 mm, min, %

Reduction of Area, min, %

BC

¼ to 2 ½, incl

125 000 (862)

109 000 (752)

16

50

BC

Over 2 ½

115 000 (793)

99 000 (683)

16

45

BD

¼ to 2 ½, incl

150 000 (1034)

130 000 (896)

14

40

BD

Over 2 ½

140 000 (965)

115 000 (793)

14

40