API 5CT Casing & Tubing
Mechanical properties:
| 
				 Standard  | 
			
				 Grade  | 
			
				 Tensile Strength(MPa)  | 
			
				 Yield Strength(MPa)  | 
		
| 
				 API SPEC 5CT  | 
			
				 J55  | 
			
				 ≥517  | 
			
				 379~552  | 
		
| 
				 K55  | 
			
				 ≥517  | 
			
				 ≥655  | 
		|
| 
				 N80  | 
			
				 ≥689  | 
			
				 552~758  | 
		|
| 
				 L80(13Cr)  | 
			
				 ≥655  | 
			
				 552~655  | 
		|
| 
				 P110  | 
			
				 ≥862  | 
			
				 758~965  | 
		
Chemical Composition:
| 
				 Standard  | 
			
				 grade  | 
			
				 Chemical Composition(%)  | 
		||||||||||
| 
				 C  | 
			
				 Si  | 
			
				 Mn  | 
			
				 P  | 
			
				 S  | 
			
				 Cr  | 
			
				 Ni  | 
			
				 Cu  | 
			
				 Mo  | 
			
				 V  | 
			
				 Als  | 
		||
| 
				 API SPEC 5CT  | 
			
				 J55K55 (37Mn5)  | 
			
				 0.34~0.39  | 
			
				 0.20~0.35  | 
			
				 1.25~1.50  | 
			
				 ≤0.020  | 
			
				 ≤0.015  | 
			
				 ≤0.15  | 
			
				 ≤0.20  | 
			
				 ≤0.20  | 
			
				 /  | 
			
				 /  | 
			
				 ≤0.020  | 
		
| 
				 N80 (36 Mn2V)  | 
			
				 0.34~0.38  | 
			
				 0.20~0.35  | 
			
				 1.45~1.70  | 
			
				 ≤0.020  | 
			
				 ≤0.015  | 
			
				 ≤0.15  | 
			
				 /  | 
			
				 /  | 
			
				 /  | 
			
				 0.11~0.16  | 
			
				 ≤0.020  | 
		|
| 
				 L80(13Cr)  | 
			
				 0.15~0.22  | 
			
				 ≤1.00  | 
			
				 0.25~1.00  | 
			
				 ≤0.020  | 
			
				 ≤0.010  | 
			
				 12.0~14.0  | 
			
				 ≤0.20  | 
			
				 ≤0.20  | 
			
				 /  | 
			
				 /  | 
			
				 ≤0.020  | 
		|
| 
				 P110 (30CrMo)  | 
			
				 0.26~0.35  | 
			
				 0.17~0.37  | 
			
				 0.40~0.70  | 
			
				 ≤0.020  | 
			
				 ≤0.010  | 
			
				 0.80~1.10  | 
			
				 ≤0.20  | 
			
				 ≤0.20  | 
			
				 0.15~0.25  | 
			
				 ≤0.08  | 
			
				 ≤0.020  | 
		|
Dimensional Deviation:
| 
				 Dimensional Deviation  | 
		||
| 
				 Items  | 
			
				 Allowable Deviation  | 
		|
| 
				 Out Diameter  | 
			
				 Pipe Body  | 
			
				 D≤101.60mm±0.79mm  | 
		
| 
				 D≥114.30mm +1.0%  | 
		||
| 
				 -0.5%  | 
		||
| 
				 
  | 
			
				 
  | 
		|
| 
				 Wall Thickness  | 
			
				 -12.5%  | 
		|
| 
				 Weight  | 
			
				 Each Piece  | 
			
				 +6.5%  | 
		
| 
				 +3.5%  | 
		||
Length Range
| 
				 Length  | 
		|||
| 
				 Item  | 
			
				 Scope 1  | 
			
				 Scope 2  | 
			
				 Scope 3  | 
		
| 
				 Tubing  | 
			
				 6.10-7.32m  | 
			
				 8.53-9.75m  | 
			
				 -  | 
		
| 
				 Casing  | 
			
				 4.88-7.62m  | 
			
				 7.62-10.36m  | 
			
				 10.36-14.63m  |