What's the difference between API 5L X60 and X65 - Knowledge

Chemical properties

Grade X60-PSL1 Oil and gas pipe lines Chemical Composition (%)

	Composition	C ^*	Mn ^*	P	S	Cr	Ni	Cu	Mo	B	More
Seamless Pipe	Min	-	-	-	-	-	-	-	-	-	Nb+V+Ti≤0.15*
Seamless Pipe	Max	0.28	1.4	0.03	0.03	0.5	0.5	0.5	0.15	0.001	Nb+V+Ti≤0.15*

	Composition	C ^*	Mn ^*	P	S	Cr	Ni	Cu	Mo	B	More
Welded Pipe	Min	-	-	-	-	-	-	-	-	-	Nb+V+Ti≤0.15*
Welded Pipe	Max	0.26	1.4	0.03	0.03	0.5	0.5	0.5	0.15	0.001	Nb+V+Ti≤0.15*

Grade X60N-PSL2 Carbon Steel Line Pipe Chemical Composition(%)

	Composition	C ^*	Si ^*	Mn ^*	P	S	Cr ^*	Ni ^*	Cu ^*	Mo ^*	Ti ^*	V ^*	Nb ^*	B	More
Seamless Pipe, Welded Pipe	Min	-	-	-	-	-	-	-	-	-	-	-	-	-	Nb+V+Ti≤0.15*
Seamless Pipe, Welded Pipe	Max	0.24	0.45	1.4	0.025	0.015	0.5	0.5	0.5	0.5	0.04	0.1	0.05	0.001	Nb+V+Ti≤0.15*

Grade X60Q-PSL2 Seamless Steel Line Pipe Chemical Composition(%)

	Composition	C ^*	Si ^*	Mn ^*	P	S	Cr ^*	Ni ^*	Cu ^*	Mo ^*	B	More
Seamless Pipe, Welded Pipe	Min	-	-	-	-	-	-	-	-	-	-	Nb+V+Ti≤0.15*
Seamless Pipe, Welded Pipe	Max	0.18	0.45	1.7	0.025	0.015	0.5	0.5	0.5	0.5	0.001	Nb+V+Ti≤0.15*

Grade X60M-PSL2 Pipelines For Combustible Fluids Chemical Composition(%)

	Composition	C ^*	Si ^*	Mn ^*	P	S	Cr ^*	Ni ^*	Cu ^*	Mo ^*	B	More
Welded Pipe	Min	-	-	-	-	-	-	-	-	-	-	Nb+V+Ti≤0.15*
Welded Pipe	Max	0.12	0.45	1.6	0.025	0.015	0.5	0.5	0.5	0.5	0.001	Nb+V+Ti≤0.15*

Grade X65-PSL1 Seamless Line Pipes Chemical Composition(%)

	Composition	C ^*	Mn ^*	P	S	Cr	Ni	Cu	Mo	B	More
Seamless Pipe	Min	-	-	-	-	-	-	-	-	-	Nb+V+Ti≤0.15*
Seamless Pipe	Max	0.28	1.4	0.03	0.03	0.5	0.5	0.5	0.15	0.001	Nb+V+Ti≤0.15*

	Composition	C ^*	Mn ^*	P	S	Cr	Ni	Cu	Mo	B	More
Welded Pipe	Min	-	-	-	-	-	-	-	-	-	Nb+V+Ti≤0.15*
Welded Pipe	Max	0.26	1.45	0.03	0.03	0.5	0.5	0.5	0.15	0.001	Nb+V+Ti≤0.15*

Grade X65Q-PSL2 Carbon Steel Line Pipe Chemical Composition(%)

	Composition	C ^*	Si ^*	Mn ^*	P	S	Cr ^*	Ni ^*	Cu ^*	Mo ^*	B	More
Seamless Pipe, Welded Pipe	Min	-	-	-	-	-	-	-	-	-	-	Nb+V+Ti≤0.15*
Seamless Pipe, Welded Pipe	Max	0.18	0.45	1.7	0.025	0.015	0.5	0.5	0.5	0.5	0.001	Nb+V+Ti≤0.15*

Grade X65M-PSL2 Carbon Steel High Temperature Seamless Pipes Chemical Composition(%)

	Composition	C ^*	Si ^*	Mn ^*	P	S	Cr ^*	Ni ^*	Cu ^*	Mo ^*	B	More
Welded Pipe	Min	-	-	-	-	-	-	-	-	-	-	Nb+V+Ti≤0.15*
Welded Pipe	Max	0.18	0.45	1.6	0.025	0.015	0.5	0.5	0.5	0.5	0.001	Nb+V+Ti≤0.15*

API 5L X65 Carbon Steel Line Pipe

Mechanical properties

Grade X60-PSL1 Pipe for high pressure gas transportation Mechanical properties

Type	Tensile strength σ_b Mpa	Yield point σ_s Mpa	Elongation at break δ %
Seamless Pipe, Welded Pipe	≥520	≥415	*

Grade X60N-PSL2 Line Pipes for oil & gas Mechanical properties

Type	Test temperature	Tensile strength σ_b Mpa	Yield point σ_s Mpa	Elongation at break δ %	Impact absorbed energy KV2 J
Seamless Pipe, Welded Pipe		520~760	415~565	*
OD≤20	0°C				≥27
OD>20~30	0°C				≥27
OD>30~36	0°C				≥40
OD>36~48	0°C				≥40
OD>48~56	0°C				≥40
OD>56~84	0°C				≥40

Grade X60Q-PSL2 Carbon Steel Line Pipe Mechanical properties

Type	Test temperature	Tensile strength σ_b Mpa	Yield point σ_s Mpa	Elongation at break δ %	Impact absorbed energy KV2 J
Seamless Pipe, Welded Pipe		520~760	415~565	*
OD≤20	0°C				≥27
OD>20~30	0°C				≥27
OD>30~36	0°C				≥40
OD>36~48	0°C				≥40
OD>48~56	0°C				≥40
OD>56~84	0°C				≥40

Grade X60M-PSL2 Oil and gas transmission pipe Mechanical properties

Type	Test temperature	Tensile strength σ_b Mpa	Yield point σ_s Mpa	Elongation at break δ %	Impact absorbed energy KV2 J
Welded Pipe		520~760	415~565	*
OD≤20	0°C				≥27
OD>20~30	0°C				≥27
OD>30~36	0°C				≥40
OD>36~48	0°C				≥40
OD>48~56	0°C				≥40
OD>56~84	0°C				≥40

api 5l x60 octg pipeline

Grade X65-PSL1 Seamless Pipe for natural gas Mechanical properties

Type	Tensile strength σ_b Mpa	Yield point σ_s Mpa	Elongation at break δ %
Seamless Pipe, Welded Pipe	≥535	≥450	*

Grade X65Q-PSL2 Carbon Steel Line Pipe Mechanical properties

Type	Test temperature	Tensile strength σ_b Mpa	Yield point σ_s Mpa	Elongation at break δ %	Impact absorbed energy KV2 J
Seamless Pipe, Welded Pipe		535~760	450~600	*
OD≤30	0°C				≥27
OD>30~48	0°C				≥40
OD>48~84	0°C				≥54

Grade X65M-PSL2 Seamless Steel Line Pipe Mechanical properties

Type	Test temperature	Tensile strength σ_b Mpa	Yield point σ_s Mpa	Elongation at break δ %	Impact absorbed energy KV2 J
Welded Pipe		535~760	450~600	*
OD≤30	0°C				≥27
OD>30~48	0°C				≥40
OD>48~84	0°C				≥54

Application:

Due to the high strength and pressure resistance of X65, it is commonly used in oil and gas transportation pipelines under higher pressure and temperature conditions, especially in applications where longer distances and more complex terrains are required in the transportation system.