Chinese Professional Ms Tube - JIS G3444 – FIVE STEEL

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Chinese Professional Ms Tube - JIS G3444 – FIVE STEEL Detail:

JIS G3444 Round Steel Pipe

Outside diameter(mm):21.7-1016.0

Wall Thickness(mm): 2.0-22

Length: 1m-12m or customized length

Surface treatment: black, painting, galvanized, etc.

Ends:plain or threaded both end with one end plastic cap one end coupling

Packing: in bundle or wrapped with water-proof pvc cloth.

Shipping.: bulk or load in containers.

Payment: T / T, L / C, western union

Applications: structure,water,gas and so on.

Table 1. Chemical Composition

					Unit:%
Symbol of grade	C	Si	Mn	P	S
STK290	-	-	-	0.050 max.	0.050 max.
STK400	0.25 max.	-	-	0.040 max.	0.040 max.
STK490	0.18 max.	0.55 max.	1.65 max.	0.035 max.	0.035 max.
STK500	0.24 max.	0.35 max.	0.30 to 1.30	0.040 max.	0.040 max.
STK540	0.23 max.	0.55 max.	1.50 max.	0.040 max.	0.040 max.
Notes a) If necessary,alloying elements other than specified in this table may be added. b) For the tube of grade STK540 exceeding 12.5 mm in wall thickness,the chemical composition may be subject to the aggreement between the purchaser and the manufacturer.

Table 2. Mechanical Properties

Symbol of grade	Tensile strength N/mm²	Yield point of proof stress N/mm²	Tensile strength in weld zone N/mm²	Flattening	Bendability
	Tensile strength N/mm²	Yield point of proof stress N/mm²	Tensile strength in weld zone N/mm²	Distance between plates(H)	Bend angle	Inside radius
	Applied outside diameter
	All outside diameters	All outside diameters	All outside diameters	All outside diameters	50 mm max.
STK290	290 min.	-	290 min.	2/3 D	90°	6 D
STK400	400 min.	235 min.	400 min.	2/3 D	90°	6 D
STK490	490 min.	315 min.	490 min.	7/8 D	90°	6 D
STK800	500 min.	355 min.	500 min.	7/8 D	90°	6 D
STK540	540 min.	390 min.	540 min.	7/8 D	90°	6 D
NOTE 1 D of this table is the outside diameter of the tubes. NOTE 2 1 Nmm²=1MPa