TEST TO BE CARRIED OUT ON REINFORCEMENT STEEL

TEST TO BE CARRIED OUT ON REINFORCEMENT STEEL

A) Test to be carried out at site

1. Company name
Qty to be checked - 1 sample per lot per size

Frequency of checked - per lot per size

Acceptance criteria & tolerance- as per order

2. Type of steel 

Qty to be checked - 2 sample per lot per size

Frequency of checked - per lot per size

Acceptance criteria & tolerance-HYSD/ CTD/ TDR- 40/TMT/TOR- 50 As per order(Manufacturer's Test Certificate Receipt Mandatory)

3. Physical Appearance

Qty to be checked - 2 sample per lot per size

Frequency of checked - per lot per size

Acceptance criteria & tolerance-Without cracks or splits

4.Weight/meter or rolling margin

Qty to be checked - 1 sample per lot per size

Frequency of checked - per lot per size

Acceptance criteria & tolerance-8mm   = 0.395 kg/m

                                                        10mm = 0.617 kg/m

                                                         Tolerence in nominal mass + - 7%

                                                         12mm = 0.888 Kg/m

                                                          16mm = 1.58 Kg/m

                                                          Tolerence in nominal mass + - 5%

                                                          20mm = 2.47 Kg/m

                                                          25mm = 3.85 Kg/m

                                                          32mm = 6.31 Kg/m

                                                          Tolerence in nominal mass for < 16mm dia bar is + - 3%

5. Length of bar

Qty to be checked - 1 sample per lot per size

Frequency of checked - per lot per size

Acceptance criteria & tolerance- For 8 to 10mm dia  -  Length   11  to 12m

                                                                  For 16mm & above dia -  Length >12m

6. Bend test 

Qty to be checked - 1 sample per lot per size

Frequency of checked - per lot per size

Acceptance criteria & tolerance- No rupture or crack visible on the bend portion

7 Resend test

Qty to be checked - 1 sample per lot per size

Frequency of checked - per lot per size

Acceptance criteria &  tolerance- No rupture or crack visible on the bend portion

B) Test to be carried outside laboratory

1. Tensile strength

Qty to be checked - 1 sample per lot per size

Frequency of checked - each 50 ton

Acceptance criteria &  tolerance- IS: 1786 ,10% more than proof stress but not less than 485N/mm

2.Elongation
Qty to be checked - 1 sample per lot per size

Frequency of checked - each 50 ton

Acceptance criteria &  tolerance- Min. 14.5%

3. Chemical Composition

Qty to be checked - 1 sample per lot per size

Frequency of checked - each 50 ton

Acceptance criteria &  tolerance- Carbon </= 0.3%
                                                           Sulphur  </= 0.06%
                                                           Phosporous </= 0.06%
                                                           Sulphur + Phosporous  </= 0.11%
                                                           (for Fe 415)