The worker is tightening up the steel rebar with steel wire.

Tightening up the steel rebar.

Before choosing the right steel rebar you need to understand its type and related mechanical properties.

Table 1: Type and Related Mechanical Properties
Rebar Grade Nominal Diameter Range (mm) Yield Strength (N/mm2) Tensile Strength (N/mm2) percentage elongation after fracture (%) Maximize the total elongation (%)
HPB300 6–22 300 420 25.0 10
HRB335 6–14 335 455 17.0 7.5
HRB400
HRBF400
6–50 400 540 16.0 7.5
HRB400E
HRBF400E
6–50 400 540 9.0
HRB500
HRBF500
6–50 500 630 15.0 7.5
HRB500E
HRBF500E
6–50 500 630 9.0
RRB400 8–50 400 540 14.0 5.0
RRB400W 8–40 430 570 16.0 7.5
RRB500 8–50 500 630 13.0 5.0
CRB550 5–12 500 550 8.0
CPB550 5–12 500 550 5.0
CRB600H 5–12 520 600 14.0 5.0

Remark:

  • HPB is short for hot-rolled plain steel bar. It is Grade I rebar.
  • HRB is short for hot-rolled ribbed bar. HRB300 is Grade II rebar, HRB400 is Grade III rebar.
  • HRBF is short for hot-rolled ribbed bar of fine grains.
  • RRB is short for remained-heat-treatment ribbed-steel bar.
  • CRB is short for cold-rolled ribbed bar.
  • CPB is short for cold-rolled plain steel bar.