Flat / Hot Rolled
Flat steel products are obtained by heating semi-finished products with a rectangular cross-section (slab), which are produced by the continuous casting method, to a specific temperature and then rolling them, with thicknesses ranging from 1.40 to 25.40 mm and widths ranging from 700 to 2025 mm, produceed as coil or by cutting/slit-coiling flat steel products from coils.
Hot rolled steels for manufacturing line pipes of crude oil and natural gas
- Unless otherwise specified; (Nb + V) ≤ 0.06%
- For each reduction of per 0.01% below the specified maximum carbon content, an increase of 0.05% above the specified maximum manganese content is permissible up to a maximum of 1.65%.
- Deoxidation method of this products is fully-killed. Minimum aluminium to nitrogen ratio is 2:1.
- For product analysis if C % ≤ 0.12 then C equivalent formula, CE pcm % = C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B is applied. If B % < 0.0005 then B value shall not be taken into account in the formula given above and shall be accepted 0 (zero). For product analysis if C % > 0.12 then C equivalent formula, CEııw % = C+(Mn/6)+(Cr+Mo+V)/5+(Ni+Cu)/15 is applied. Carbon equivalent related to heat analysis is indicated in test certificate and also it is guaranteed in product analysis as an Erdemir practice.
- Unless otherwise specified, B is not added.
- In Erdemir practice, test values apply to transverse specimens taken from the coil, although these test values apply to transverse specimens taken from the pipe body.
- Elongation percentage values given on the table are valid for thickness ≥ 12,7mm. For thinner thicknesses (<12,7mm); A50 (%) = 1940 Axc0.2 / U0.9 (Axc: cross-sectional area of specimen, mm²; U: minimum tensile strength, N/mm²) formulation is applied.
- Impact test is not carried out under 6.00 mm thickness. For thicknesses in the range of T ≥ 6.00, CVN impact energy values are guaranteed as specifed in standart without applying CVN impact test, however CVN impact test may be performed "optionally" to meet CVN absorbed energy requirements of customer in case of negotiation. % Shear fracture area is not measured under 6.00mm thicknesses. For thicknesses equal or over 6.00mm, calculation of average shear fracture area is done "optionally" for pipes with diameter (D) ≤ 508mm. If pipe diameter (D) > 508mm or not specified calculation of average shear fracture area is not performed.
- % Shear fracture are values are guaranteed subject to negotiation with performing DWTT providing % shear fracture area is equal or greater than 85% at 0º celcius for grades ordered as PSL2 in all thickness, results are released as separated from test report.
- There are some discrepansies (increase or decrease) between the test results, according to taken specimens from coil or pipe depending on diameter, type and direction of test taken from pipe. Therefore we advise our customers to consider this issue and determine the most suitable grade for their intended production accordingly.Mechanical properties which are specified in the above table for hot rolled bands are only guaranteed on the sample taken perpendicular to the rolling direction.
Hot rolled steels for manufacturing line pipes of crude oil and natural gas
- Unless otherwise specified; (Nb + V) ≤ 0.06%
- For each reduction of per 0.01% below the specified maximum carbon content, an increase of 0.05% above the specified maximum manganese content is permissible up to a maximum of 1.65%.
- Deoxidation method of this products is fully-killed. Minimum aluminium to nitrogen ratio is 2:1.
- For product analysis if C % ≤ 0.12 then C equivalent formula, CE pcm % = C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B is applied. If B % < 0.0005 then B value shall not be taken into account in the formula given above and shall be accepted 0 (zero). For product analysis if C % > 0.12 then C equivalent formula, CEııw % = C+(Mn/6)+(Cr+Mo+V)/5+(Ni+Cu)/15 is applied. Carbon equivalent related to heat analysis is indicated in test certificate and also it is guaranteed in product analysis as an Erdemir practice.
- Unless otherwise specified, B is not added.
- In Erdemir practice, test values apply to transverse specimens taken from the coil, although these test values apply to transverse specimens taken from the pipe body.
- Elongation percentage values given on the table are valid for thickness ≥ 12,7mm. For thinner thicknesses (<12,7mm); A50 (%) = 1940 Axc0.2 / U0.9 (Axc: cross-sectional area of specimen, mm²; U: minimum tensile strength, N/mm²) formulation is applied.
- Impact test is not carried out under 6.00 mm thickness. For thicknesses in the range of T ≥ 6.00, CVN impact energy values are guaranteed as specifed in standart without applying CVN impact test, however CVN impact test may be performed "optionally" to meet CVN absorbed energy requirements of customer in case of negotiation. % Shear fracture area is not measured under 6.00mm thicknesses. For thicknesses equal or over 6.00mm, calculation of average shear fracture area is done "optionally" for pipes with diameter (D) ≤ 508mm. If pipe diameter (D) > 508mm or not specified calculation of average shear fracture area is not performed.
- % Shear fracture are values are guaranteed subject to negotiation with performing DWTT providing % shear fracture area is equal or greater than 85% at 0º celcius for grades ordered as PSL2 in all thickness, results are released as separated from test report.
- There are some discrepansies (increase or decrease) between the test results, according to taken specimens from coil or pipe depending on diameter, type and direction of test taken from pipe. Therefore we advise our customers to consider this issue and determine the most suitable grade for their intended production accordingly.Mechanical properties which are specified in the above table for hot rolled bands are only guaranteed on the sample taken perpendicular to the rolling direction.
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