STK55 STEEL PIPE STK540 STEEL TUBE

Hot finished and cold formed steel materials stk55 steel pipe,stk540 steel tube,stk540 seamless pipe owned higher tensile strength and yield strength in Japanese standard JIS G3444.Stk540 steel pipe supplies as stk540 seamless pipe or stk540 welded pipe,welded pipe can be ERW pipe,ARC welded pipe.

Technical Requirements & Additional Services for STK540 Steel Pipe:
♦ Standard test method for heat analysis according to JIS G0320
♦ General technical delivery requirements for steel and steel products under JIS G0404
♦ Steel pipes shall be furnished with plane ends or bevel end finishing if required
♦ Flattening test,Bend test,Hardness test result appear on original mill certificate
♦ Surface Protection:Black,Varnish,Hot Dip Galvanized,Coating with shop prime.
 

►Mechnical property for STK540 Steel pipe:

Grade	Yield strength (≥Mpa)	Tensile strength (≥Mpa)
STK540	390	540

►Chemical composition for STK540 Steel pipe (Heat Analysis Max%)

Main chemical elements composition of STK540
C	Si	Mn	P	S
0.23	0.55	1.50	0.040	0.040