Technical conditions for plates of P355GH

Gloria Steel Limited

  • Technical conditions for plates of P355GH0
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4-Dec-13
Steel
US $3,000.00 / MT
10.00 MT
L/C, T/T
China
Standard seaworthy export packing or as your requirement.
30 day(s).

Product Details

Technical conditions for plates of P355GH

1. Scope
The technical conditions apply to plates of P355GH with thickness not more than 250mm. (8mm-250mm) used for Harbin Boiler produce CFB boiler.
2. Adopt standard:
EN10028-2: 2003 Flat products made of steels for pressure purposes Part 2: Non-alloy and alloy steels with specified elevated temperature properties
EN10163-2:2004 Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections - Part 2: Plate and wide flats Class B.
3. Dimension, Shape, Weight and Permissible Deviation
The dimension, shape, weight and permissible deviation shall meet the requirements of EN10029.
4. Technical conditions
4.1 Chemical composition (Ladle analysis)
The chemical composition of plates shall be accordance with the following table 1.
Table 1 Chemical composition (Ladle analysis)
C Si Mn P S Alt Cr Cu Mo Nb Ti V N
0.10- 0.22 Max 0.60 1.10- 1.70 Max 0.025 Max 0.015 Min 0.020 Max 0.30 Max 0.30 Max 0.08 Max 0.020 Max 0.030 Max 0.020 Max 0.012

4.2 Carbon equivalent (CEq)
Carbon equivalent shall be not more than 0.43 for plates of P355GH.
Carbon equivalent shall be calculated as follows:
CEq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15 (%)
4.3 Mechanical properties
The mechanical properties of P355GH shall meet the requirement as table 2.
Table 2 Tensile properties
Thickness mm Yield strength MPa Tensile strength MPa 0C Akv (J) Elongation %
8-60 Min 355 490-630 Min 34J Min 22
60-100 Min 355 490-630 Min 34J Min 21
100-150 Min 315 470-610 Min 34J Min 21
150-250 Min 295 450-590 Min 34J Min 21

4.4 SWHT: The optimized SWHT technology is as follows: heating at 610℃+/-10℃ for 7h, then followed by cooling in furnace to 400℃, then for air cooling.
4.5 Minimum values for the proof strength Rp0.2 at elevated temperatures shall meet the requirements per table 4.


Table 4 High temp Tensile properties
Test TEMP Thickness mm 320℃ 350℃ 370℃
Rp0.2
Min (MPa) 8-40 225 214 209
41-100 218 208 203
101-250 212 202 197

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Gloria Steel Limited
23-Oct-2013
China
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