Technical conditions for plates of X7Ni9

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Posted On

4-Dec-13

Product Details

(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 Mo V Ni
Max 0.10 Max 0.35 0.30- 0.80 Max 0.010 Max 0.004 Min 0.02 Max 0.10 Max 0.01 8.5- 10.0
Note: Ni+Cu+Mo =<0.50%

4.2 Mechanical properties
The mechanical properties of X7Ni9 shall meet the requirement as table 2.
Table 2 Tensile properties
Thickness mm Yield strength MPa Tensile strength MPa -196 C Akv (J)
Transverse Elongation % Bend test
180C
8-30 Min 575 680-820 Min 100J Min 18 d=3a
31-50 Min 565 680-820 Min 100J Min 18 d=3a

4.3 Surface quality
The surface quality of plates shall be accordance with EN10163-2.
4.4 Ultrasonic inspection
Plates shall be ultrasonic inspected per EN10160-1999 S2E2.
4.5 Test method and inspection rules
Test items, sampling quantity, sampling method and test method shall conform to table 4.
Table 4 Test items for plates
No. Test item Quantity, Piece Sampling method Test method
1 Chemical composition (Ladle analysis) 1 (per batch furnace number) EN10028-4 EN10028-4
2 Tensile test 1 (Rolled pc) EN10028-1 EN10028-1
3 Impact test at -196C 3 (Rolled pc) EN10028-1 EN10028-1
4 Thickness tension 3 (Rolled pc) EN10164 EN10164
5 Product analysis 1 (Product pc) EN10028-1 EN10028-1
6 Ultrasonic test Each product pc EN10160 EN10160.

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