ASTM A519

ASTM A519 specification covers for several grades of carbon and alloy steel mechanical tubing, either hot-finished or cold-finished. The steel used in the mechanical tubing may be cast in ingots or may be strand cast. When steel of different grades is sequentially strand cast, identification of the resultant transition material is required. The seamless tubing is a tubular product made without a welded seam. It is usually manufactured by hot working steel, and if necessary, by subsequently cold finishing the hot-worked tubular product to produce the desired shape, dimensions and properties. The tubes shall be furnished in the following shapes: round, square, rectangular and special sections. Heat analysis shall be made to determine the percentages of the elements specified. If secondary melting processes are used, the heat analysis shall be obtained from one remelted ingot or the product of one remelted ingot of each primary melt. The tubing shall be coated with a film of oil before shaping to retard rust when specified. Seamless mechanical tubing is manufactured from carbon and alloy steels for structural or other mechanical purposes involving machining or heat treating, where close tolerances, smooth finish, or definite physical properties are important factors.

1.1 this specification covers several frades of carbon and alloy steel seamless mechanical tubing. The frades anr listed in Tables 1, 2, and 3. When welding is used for joining the weldable mechanical tube grades, the welding procedure shall be suitable for the frade, the condition of the components, and the intended service.

1.2 This specification covers both seamless hot-finished emchanical tubing and seamless cold-finished mechanical tubing in sizes up to and including 12 3/4 in.(322.8mm) outside diameter of rround tubes with wall thicknesses as required.

1.3 The tubes shall be furnished in the following shapes, as specified by the purchaser:round, square, rectagular, and special sections.

1.4 Supplementary requirements of an optional nature are provided and when desired shall be so stated in the order.

1.5 The values stated in inch-pround units are to be regarded as the standard.

A519 seamless tubing is commonly used in applications requiring machining, heat treating, close tolerances, smooth finishes, and/or definite physical properties.

The steel used in the mechanical tubing may be cast in ingots or may be strand cast. When steel of different grades is sequentially strand cast, identification of the resultant transition material is required. The seamless tubing is a tubular product made without a welded seam. It is usually manufactured by hot working steel, and if necessary, by subsequently cold finishing the hot-worked tubular product to produce the desired shape, dimensions and properties.

The tubes shall be furnished in the following shapes: round, square, rectangular and special sections. Heat analysis shall be made to determine the percentages of the elements specified. If secondary melting processes are used, the heat analysis shall be obtained from one remelted ingot or the product of one remelted ingot of each primary melt. The tubing shall be coated with a film of oil before shaping to retard rust when specified This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

Chemical Composition (%) of ASTM A519

ASTM A519 covers several grades of carbon and alloy steel seamless mechanical tubing. The standard is also acceptable in the manufacture of piping.

Grade Designation	C	Mn	P≤	S≤	Si	Cr	Mo
1008	≤0.10	0.30-0.50	0.04	0.05	-	-	-
1010	0.08-0.13	0.30-0.60	0.04	0.05	-	-	-
1018	0.15-0.20	0.60-0.90	0.04	0.05	-	-	-
1020	0.18-0.23	0.30-0.60	0.04	0.05	-	-	-
1025	0.22-0.28	0.30-0.60	0.04	0.05	-	-	-
1026	0.22-0.28	0.60-0.90	0.04	0.05	-	-	-
4130	0.28-0.33	0.40-0.60	0.04	0.05	0.15-0.35	0.80-1.10	0.15-0.25
4140	0.38-0.43	0.75-1.00	0.04	0.05	0.15-0.35	0.80-1.10	0.15-0.25

Mechanical properties of ASTM A519

Grade	Condition	MPa Tenslle Point	Yield Point	Elongation
1020	CW	≥414	≥483	≥5%
	SR	≥345	≥448	≥10%
	A	≥193	≥331	≥30%
	N	≥234	≥379	≥22%
1025	CW	≥448	≥517	≥5%
	SR	≥379	≥483	≥8%
	A	≥207	≥365	≥25%
	N	≥248	≥379	≥22%
4130	SR	≥586	≥724	≥10%
	A	≥379	≥517	≥30%
	N	≥414	≥621	≥20%
4140	SR	≥689	≥855	≥10%
	A	≥414	≥552	≥25%
	N	≥621	≥855	≥20%

JIS number and corrensponding foreign standards

JIS			ASTM			BS			DIN			NF			ISO			Index Number
Standard Number	Grade	Tupe	Standard Number	Grade	Tupe	Standard Number	Grade	Tupe	Standard Number	Grade	Tupe	Standard Number	Grade	Tupe	Standard Number	Grade	Tupe
G3445	STKM11A	C	ASTM A512	MT1010	C	1717	ERWC1	C	2391	St30Si	C				3304	R28	C	C017
			ASTM A513	MT1010	C					St30A1	C				3305	"	C
									2393	St28	C				3306	"	C
										RSt28	C
									2394	St28	C
										USt28	C
										RSt28	C
	STKM12A	C	ASTM A512	MT1015	C	1717	ERWC2	C	2391	St37-2					3304	R33	C
			ASTM A513	MT1015	C	6323	HFS3	C		RSt37-2					3305	"	"
	STKM12B	C	ASTM A512	MT1015	C				2394	St37-2					3306	"	"
			ASTM A513	MT1015	C					Ust38-2
			ASTM A519	MT1015	C					RSt-2
	STKM12C	C				1717	CEWC2	C				A49-322	TU37b	C
						"	CFSC3	C				A49-327	TU37b	C
						6323	CFS3	C
						"	CFS3A	C
	STKM13A	C	ASTM A312	MT1020	C	1717	ERWC3	C	2391	St45	C	A49-324	TU37b	C	2937	TS4	C
			ASTM A513	MT1020	C				2393	St44-2	C	A49-330	TU37b	C	3304	R37	"
									2394	St44-2	C	A49-343	TU38b	C	3305	"	"
	STKM13B	C	ASTM A513	MT1020	C										3306	"	"
	STKM13C	C				1717	CEWC3	C
						"	CFSC4	C
						6323	CFS4	C
	STKM14A	C	ASTM A513	MT1020	C	6323	HFS4	C							2937	TS9	C
															3304	R42	"
	STKM14B	C				6323	HFS5	C							3305	R42	C
	STMK14C	C													3306	"	"
	STKM15A	C	ASTM A513	1030	C
			ASTM A519	1030	C
	STKM15C
	STKM16A	C	ASTM A519	1040	C							A49-311	TUXC35	C
												A49-312	TUXC35	C
	STKM16C	C
	STKM17A	C	ASTM A519	1050	C	6323	HFS8	C
	STKM17C	C				6323	CFS8	C
	STKM18A	C	ASTM A519	1518	C	1717	ERWC5	C				A49-310	TU52b	C
												A49-311	TU52b	C
												A49-312	TU52b	C
	STKM18B	C										A49-321	TU52b	C
												A49-323	TU52b	C
												A49-326	TU52b	C
	STKM18C	C										A49-330	TU52b	C
												A49-341	TS42a	C
												"	TS47a	C
												A49-343	TS18M5	C
	STKM19A	C	ASTM A519	1524	C				2391	ST52	C				2937	TS18	C
									2393	ST52-3	C				2938	Gr.1	C
									2394	ST52-3	C				3304	R50	C
															3305	R50	C
															3306	R50	C
	STKM20A	C
G3441	SCr420TK	Cr																C018
	SCM415TK	CrMo
	SCM418TK	CrMo				6323	CFS10	CrMo
	SCM420TK	CrMo	ASTM A519	5120	CrMo
	SCM430TK	CrMo	ASTM A519	4130	CrMo
	SCM435TK	CrMo	ASTM A519	4135	CrMo
	SCM440TK	CrMo	ASTM A519	4140	CrMo	6323	CFS10	CrMo

ASTM A513 Mechanical Pipe VS ASTM A519 Mechanical pipe

ASTM A513 standard for carbon mechanical piping and electrical resistance welding alloy (ERW). It covers carbon steel grades split into 1008 and above in addition to specified alloy steels and can be classifiedA513 Type1A (hot rolled), Type 1B (preserved in vinegar and greased), Type 2 (cold rolled) and Type 5 (drawn on mandrel).

ASTM A513 Type 1

ASTM A513 Type 1A mechanical pipe is produced from hot rolled steel and A513 Type 1B pipe is produced in hot rolled steel strip that has been preserved in vinegar to descale after greased to provide a clean hot rolled surface.

A513 Type 1 pipe provides more specific tolerances for OD, wall thickness, length and straightness pipe tolerances and structural pipe specifications. It is often used in applications where bending, burning or flattening is required.

ASTM A513 Type 2

ASTM A513 Type 2 is produced in hot rolled steel strip which has been cold reduced. Due to the extra cold work in steel mills, A513 type 2 pipe will have stricter tolerances of wall thickness, improved surface condition and a narrower range of type 1 mechanical properties.

A513 Type 2 mechanical reg tube is used in environments where aesthetically attractive and lightweight surfaces are required. Examples include display shelves, furniture, greenhouses, exercise equipment, and many others. The maximum wall thicknesses of cold rolled pipe is 0.120″ nominal.

ASTM A513 Type 5

ASTM A513 tube type 5 is a mandrel drawn pipe product (DOM) that has closer OD/ID/wall tolerances of reg products. Produced from 1020 and 1026 steel. It is commonly used in the automotive, appliance and construction industries.

Type of steel.

Type of steel	Degree Designation
Carbonsteel	MT1010,MT 1015,MT X 1015,MT 1020,MT X1020
CArbon steel or alloy	1008,1010,1012,1015,1016,1017,1018,1018,1019,1020, 1021,1022,1023,1024,1025,1026,1030,1035,1040,1050,1060,1340,1524,4118,4130,4140, 5130,8620,8630

ASTM A519 mechanical tubing, A standard specification of seamless carbon and alloy steel mechanical tubes, hot finished or cold finished. Where to close tolerances, smooth finish or defined physical properties are important factors. It is a cost-effective alternative to DOM steel pipe.

Type of steel	GRadeDesignation
Carbonsteel	MT1010,MT 1015,MT X 1015,MT 1020,MT X 1020
Hcarbon steel igher	1025,1026,1030,1035,1040,1045,1050
HIGH carbon steel or alloy steel	1330,1335,1340,1345, 3140,E 3310,4012,4023,4024,4027,4028,4037,4042,4047,4063,4118,4130,4135,4137,4140,4142