Yido Steel

Chemical Composition & Mechanical Property for Line Pipe

Class	Grade.	Component	Applicable Standard		Chemical Compositions (%)								Mechanical Property
Class	Grade.	Component	UNS CODE.	API CODE.	C	Mn	P	S	Si	V	Nb/Ti	Others	TS(min) Mpa	YS(min) Mpa	EL,min %
Carbon Steel (API)	L290N or X42N	0.24C-0.015S	-	API 5L Gr.X42N L2	0.24max	1.2max	0.025max	0.015max	0.40max	0.06max	0.05max	Ti.0.04 / *	415	290
	L320N or X46N	0.24C-0.015S	-	API 5L Gr.X46N L2	0.24max	1.4max	0.025max	0.015max	0.40max	0.04max	0.05max	Ti.0.04 / *	435	320
	L360N or X52N	0.24C-0.015S	-	API 5L Gr.X52N L2	0.24max	1.4max	0.025max	0.015max	0.45max	0.1max	0.05max	Ti.0.04 / *	460	360
	L390N or X56N	0.24C-0.015S	-	API 5L Gr.X56N L2	0.24max	1.4max	0.025max	0.015max	0.45max	0.1max	0.05max	Ti.0.04 / *	490	390
	L415N or X60N	0.24C-0.015S	-	API 5L Gr.X60N L2	0.24max	1.4max	0.025max	0.015max	0.45max	0.1max	0.05max	Ti.0.04 / *	520	415
	L290Q or X42Q	0.18C-0.015S	-		0.18max	1.4max	0.025max	0.015max	0.45max	0.05max	0.05max	Ti.0.04 / *	415	290
	L320Q or X46Q	0.18C-0.015S	-		0.18max	1.4max	0.025max	0.015max	0.45max	0.05max	0.05max	Ti.0.04 / *	435	320
	L360Q or X52Q	0.18C-0.015S	-		0.18max	1.5max	0.025max	0.015max	0.45max	0.05max	0.05max	Ti.0.04 / *	460	360
	L390Q or X56Q	0.18C-0.015S	-		0.18max	1.5max	0.025max	0.015max	0.45max	0.07max	0.05max	Ti.0.04 / *	490	390
	L415Q or X60Q	0.18C-0.015S	-		0.18max	1.70max	0.025max	0.015max	0.45max				520	415
	L450Q or X65Q	0.18C-0.015S	-		0.18max	1.70max	0.025max	0.015max	0.45max				535	450
	L485Q or X70Q	0.18C-0.015S	-		0.18max	1.80max	0.025max	0.015max	0.45max				570	485
	L555Q or X80Q	0.18C-0.015S	-		0.08-0.12	1.90max	0.025max	0.015max	0.45max				625	555

Chemical Composition of Ferritic Alloy Steel for Line Pipe

Class	Grade.	Component	Applicable Standard		Chemical Compositions (%)								Mechanical Property
Class	Grade.	Component	UNS CODE.	ASTM CODE.	C	Mn	P	S	Si	V	Nb/Ti	Others	TS(min) Mpa	YS(min) Mpa	EL,min %
Ferritic Alloy Steel	P-5	6.0Cr-0.65Mo	K41545	ASTM A335	0.15max	0.30-0.60	0.025max	0.025max	0.50max	4.0-6.0	0.45-0.65	-
	P-9	10.0Cr-1.10Mo	SS0400	ASTM A335	0.15max	0.30-0.60	0.025max	0.025max	0.25-1.00	8.00-10.00	0.90-1.10	-
	P-11	1.50Cr-0.65Mo	K11597	ASTM A335	0.05-0.15	0.30-0.60	0.025max	0.025max	0.50-1.00	1.90-2.60	0.44-0.65		415	205	30
	P-22	2.60Cr-1.13Mo	K21590	ASTM A335	0.05-0.15	0.30-0.60	0.025max	0.025max	0.50max	1.90-2.60	0.87-1.13		415	205	30
	P-91	9.50Cr-1.05Mo- Ni0.040max -Cb0.060-0.10"	K91560	ASTM A335	0.08-0.12	0.30-0.60	0.02max	0.01	0.20-0.50	8.00-9.50	0.85-1.05	V 0.15-0.25 N 0.030- 0.070 Al 0.04max	385	415	20