MECHANICAL PROPERTIES OF CONCRETE STEEL BARS
TS 708 / MARCH 1996

TYPES

  FLAT SURFACED (D)

RIBBED (N)   PROFILLED (P)

CLASSES

PRODUCED BY HOT WORKING (a)

THERMAL PROCESS APPLIED WHILE HOT WORKING (a)

PRODUCED BY APPLYING COLD MECHANICAL PROCESS (b)

SYMBOL

I-a

III -A

IV -a

III-b

IV-bs

IV-bk

NOMINAL DIAMETER (d) mm 

6-50

6-50

6-50

6-12

14-28

4-16

YIELD STRENGTH N/mm² Re

220

420

500

420

500

MINIMUM TENSILE STRENGTH N/mm2 Rm

340

500

550

500

550

YIELD / TENSILE MIN. STRENGTH RATE      RM / RE 

1.20

1.10

1.08

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MINIMUM BREAKING ALONGATION
6 ≤ d ≤ 28 ( σ ) % 
32 ≤ d ≤ 50 Lo=10xd

18

12

12

10

8

5

18

10

10