Astm A182 Grade F51 Requirement As Per Api 6a-60k 2j3c5j

Purchase requirement of ASTM A182 Gr.F51 as per API 6A-60K 1

Chemical Composition in % C Max. Mn Max. Si Max. P Max. S Max. Cr. Ni M Cu Max. N

Required value 0.03 2.00 1.00 0.03 0.020 21.0-23.0 4.5-6.5 2.5-3.5 1.0 0.10-0.30

2

Mechanical:(As per API ● 0.2% Yield Strength, ● Tensile Strength, ● Elongation in 50mm, ● Reduction in Area,

414 (60000) 586 (85000) 18 35

6A - 60K) Mpa (psi) Min. Mpa(psi), Min. Min. % Min.%

3

Charpy V-notch Impact test @ -50 dergree Centrigrade as per ASTM A 370 35J Min. (individual) and 45J average.

4 5

PREN shall be 31 or heigher , one analysis per lot shall be made. ●PREN=Cr+3.3(Mo+0.5W)+16N Nitrogen (N) shall ne restricted to 0.14-0.2% range

6

The Material shall meet the NACE MR0175/ISO 15156 requirement.

7

The heat treatment shall be solution annealed and water quenched. Heat treatmnent chart/records with proper traceability to the heat and heat lot shall be included with the fin material Test certification.

8

sample for testing shall be realistically reflecting the properties of the actual component. Thickness of the test block(T) shall be equal to the thickness of the actual component up to maximum thickness of 100mm. For flanges components the latgest flange thickness shall b considerd as test block/ ● Test Specimen shall be cut from the 1/4 T location from the surface where T is the thickness of the block ● Test block shall be intigrally cast or gated on the casting and shall not be removed from the castings until after the final quality heat treatment.

9

One set of impact test,tensile test,hardness test and microstructure examination shall be carried out for each heat and heat treatment load. A test lot shall not exceed 5000kgs.

10

Microstructure examination shall be carried out at the same area as location of specimen fo mechanical testing. The specimen size shall be minimum 10x10 mm,and ferrite content sh be determined according to ASTM E562 and shall be within 35-55%. The microstructure as examined at 200X and 400X magnification on a suitably eatched specimen in accordance with ASTM A923,shall be free from intermetallic phase and precipitates.

11

Hardness shall meet NACE MR0175/ISO15156 requirements.

12

Finished product shall be white pickled except for machined component/surfaces.

13

The component shall be marked to ensure full traceability to the melt and heat treatment l

14

Corrosion test per heat shall be carried out at 22+/-1Deg.C as per ASTM G48 Method A. No pttting allowed at 20X and weight loss shall not exceed 4 gm/sq.mt.

15

Ferrite scope reading shall be taken for each fitting at a minimum of four equally spaced location around circumference at the thickest section.

16

For weld repairs the following supplementry requirements apply to ASTM A890 S ● The definations for major and minor repaires shall be considered same as S33. ● Welding procedures for both major and minor shall be sumitted for Company's approval prior to carrying out repairs; ● The repair welding procedure qualification shall include the following: ○ Qualified on the same grade (UNS-Number) of material as the product; ○ Change of specific make og filler metal(brand name) requires re-qualification; ○ Examination of microstructure of base metal,and weld zone. The ferrite content shall be 35-55% for the base metal and 25-60% for the weld metal/HAZ.

○ Charpy V-notch testing as specified at (3) above, with three sets each of 3 specimens,wit notch located in the weld metal,fusion line(FL),and FL+2mm.

r API 6A-60K

As per 182 4A 450 620 25 45

Heat treatmnent be included with the final

e actual component. actual component up to a flange thickness shall be

e where T is the not be removed from

examination shall be t exceed 5000kgs.

location of specimen for ,and ferrite content shall The microstructure as ecimen in accordance tes.

ent/surfaces.

lt and heat treatment lot.

STM G48 Method A. No

four equally spaced

pply to ASTM A890 S33

same as S33.

r Company's approval

ualification; errite content shall be

ach of 3 specimens,with