ASTM A53

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OD(mm)

Wall Thickness Unit(mm)

2-3

3-4

4-5

5-6

6-7

7-8

8-9

9-10

10-11

11-12

12-16

16-18

18-20

20-24

24-30

Φ20-Φ23

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Φ24-Φ36

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Φ38-Φ43

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Φ44-Φ60

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Φ61-Φ76

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Φ89-Φ114

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Φ121-133

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Φ140-Φ159

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Φ168-Φ180

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OD(mm)	Wall Thickness Unit(mm)
/	10.5-12	12.5-17	18-20	21-25	26-30
Φ127	●	●	●	●	●
Φ133	●	●	●	●	●
Φ140	●	●	●	●	●
Φ146	●	●	●	●	●
Φ152	●	●	●	●	●
Φ159	●	●	●	●	●
Φ168	●	●	●	●	●
Φ180	●	●	●	●	●

Seamless carbon and Alloy Steel Mechanical Tubing
Application:	For mechanical and pressure use,and also for transporting steam,water,gas and etc.
Size(mm):	O.D.: 6.0∼180 W.T.: 1∼30 L: max 12000

Grade and Chemical Composition (%)

Grade	C ≤	M ≤	P ≤	S ≤	Cu ≥	Ni ≤	Cr ≤	Mo ≤	V ≤
A	0.25	0.95	0.05	0.045	0.40	0.40	0.40	0.15	0.08
B	0.30	1.20	0.05	0.045	0.40	0.40	0.40	0.15	0.08

Mechanical Properties:

Grade	Rm Mpa Tensile Strength	Mpa Yield Point	Elongation	Delivery Condition
A	≥330	≥205	20	Annealed
B	≥415	≥240	20	Annealed

Dimension Tolerances:

Pipe Type	Pipe Sizes		Tolerances
Cold Drawn	OD	≤48.3mm	±0.40mm
Cold Drawn	WT	≥60.3mm	±1%mm