Stainless Steel Seamless Pipes

Stainless Steel Seamless Pipes is a hollow steel bar, a large number of pipes used for conveying fluids, such as oil, gas, water, gas, steam,heat exchanger,mechanical machine.

In addition, engaging in bending, torsional strength of the same, lighter, and they are also widely used in the manufacture of mechanical parts and engineering structures. Also used in producing all kinds of conventional weapons, the barrel, artillery shells and so on...

Standard: ASME/ASTM: A312, A269, A213, DIN 17456, etc.

Steel Grade:
TP 304, 304H, 304L, 316, 316L, 316Ti, 317, 321, 321H, 347, 347H, 309S, 310S, 904L etc.
ASME/ASTM: A312, A269, A213, DIN 17456, etc.
Pipe size range:
Outside diameter: range from 6mm to 530mm.
Wall thickness: SCH5S, SCH10S, SCH40S, SCH80S, SCH 120S
Legnth: unbending length or fix length
Delivery requirment:
Marking: SunnySteel, material grade, standard, specification, heat no.
Surface Treatment: Bright annealed, polished outside and inside surface.
Package: knitting strip bundle, wooden box or steel box

Mill test certificate: according to EN 10204 3.2
Inspection: Third party inspection, or by clients

Check to see the full data for seamless pipes

Normal Standard

Item	ASTM A213/A213M			ASTM A312/A312M
Grade	TP304		TP304L	TP304		TP304L
	TP316		TP316L	TP316		TP316L
	TP317		TP317L	TP317		TP317L
	TP347		TP310S	TP347		TP310S
	TP309H*		TP310H*	TP317*		TP310H*
			TP321HΔ			TP321HΔ
Yield Strength σ0.2 (Mpa)	≥170;		≥205	≥170;		≥205
Tensile Strength σb (Mpa)	≥485		≥515	≥485;		≥515
Elongation %	≥35		≥35	≥35		≥35
Flattening Test	H=1.09t/(0.09+t/D)			H=1.09t/(0.09+t/D)
Flange Test	21-68%
Intergranular corrosion	"*"﹑"Δ" ASTM E112 "Δ" min 7#, "*" min 6#			"*"﹑"Δ"ASTM E112, min 6#
Hydraulic test(Mpa)	D	P max	P=220.6t/D	D	P max	ASTM A530/A530M D≤270MM P=2Rt/D R=50%σ0.2
	<25.4	7		≤88.9	17
	25.4-<38.1	10
	38.1-<50.8	14		>88.9	19
	50.8-<76.2	17
	76.2-<127	24
	≥127	31
Metallograph Analysis	STM A262 E			ASTM A262 E
Non-Destructive Test	ASTM E213 E309 E426			ASTM E213 E309 E426
Hardness	HRB<90			RB<90

Chemical composition

Grade	Chemical Composition
	C (max)	Si (max)	Mn (max)	P (max)	S (max)	Ni	Cr	Mo	Other
TP 304	0.08	0.75	2	0.04	0.03	8-11	18-20
TP 304H	0.04-0.10	0.75	2	0.04	0.03	8-11	18-20
TP 304L	0.035	0.75	2	0.04	0.03	8-13	18-20
TP 309S	0.08	0.75	2	0.04	0.03	8-13	18-20
TP 310S	0.08	0.75	2	0.045	0.03	12-15	22-24
TP 316	0.08	0.75	2	0.04	0.03	19-22	24-26
TP 316L	0.035	0.75	2	0.04	0.03	10-15	16-18
TP 316Ti	0.08	0.75	2	0.04	0.03	11-14	16-18
TP 317	0.08	0.75	2	0.04	0.03	11-14	16-18
TP 321	0.08	0.75	2	0.04	0.03	9-13	18-20
TP 321H	0.04-0.10	0.75	2	0.04	0.03	9-13	17-20
TP 347	0.08	0.75	2	0.04	0.03	9-13	17-20
TP 347H	0.04-0.10	0.75	2	0.04	0.03	9-13	17-20

Tolerance grade

Grade	Outside diameter tolerance	Grade	Wall thickness tolerance
D1	±1.50% but at least ±0.75mm	T1	±15% but at least ±0.60mm
D2	±1.00% but at least ±0.50mm	T2	±12.5% but at least ±0.40mm
D3	±0.75% but at least ±0.30mm	T3	±7.5% but at least ±0.15mm
D4	±0.50% but at least ±0.10mm	T4	±5.0% but at least ±0.10mm

Tolerance standard

Item	ASTM A213		ASTM A312		ASTM A269
	O.D.	tolerance	O.D.	tolerance	O.D.	tolerance
Outside diameter tolerance(mm)	<25.4	±0.10	10.3-48.3	+0.4/-0.8	12.7 <	+0.13/-0.13
	25.4-≤38.1	±0.15	>48.3-114.3	+0.8/-0.8	12.7-38.1	+0.13/-0.13
	>38.1-<50.8	±0.20	>114.3-219.1	+1.6/-0.8	38.1-88.9	+0.25/-0.25
	50.8-<63.5	±0.25	>219.1-457.2	+2.4/-0.8	88.9-139.7	+0.38/-0.38
	63.5-<76.2	±0.30	>457.2-660.4	+3.2/-0.8	139.7-203.2	+0.76/-0.76
	76.2-≤101.6	±0.38	>660.4-864	+4/-0.8
	>101.6-≤190.5	±0.38/-0.64	>864-1219.2	+4.8/-0.8
	>190.5-≤228.6	±0.38/-1.14
Thickness　 tolerance(mm)	O.D.	tolerance	±12.5%t		O.D.	tolerance
	≤38.1	+20%t/0			≤38.1	±15%t
	>38.1	+22%t/0			>38.1	±10%t

The Test Requirements of Standards

Standard	Chemical Composition	Tensile Strength	Yeild Point	Tension Test	Rockwell Hardness	Flattening Test	Flaring Test	Hydrostatic
ASTM A312	X	X	X	X		X
ASTM A213	X	X	X	X	X	X	X	X
ASTM A269	X				X
ASTM A511	X	X	X	X
ASTM A789	X	X	X	X
Standard	Ultrasonic	Eddy Current	Intergranular Corrosion	Grain size	α/γ	Surface Quality	Tolerance
ASTM A312		X				X	X
ASTM A213		X				X	X
ASTM A269		X				X	X
ASTM A511						X	X
ASTM A789		X			X	X	X

ASTM Mechanical Properties

Grade	Tensile Strength Min(Mpa)	Yeild Point Min(Mpa)	EL. Min(%)	Rockwell Max
TP 304	515	205	35	90
TP 304H	550	240	35	90
TP 304L	485	170	35	90
TP 309S	515	205	35	90
TP 310S	515	205	35	90
TP 316	515	205	35	90
TP 316L	485	170	35	90
TP 316Ti	515	205	35	90
TP 317	515	205	35	90
TP 321	515	205	35	90
TP 321H	515	205	35	90
TP 347	515	205	35	90
TP 347H	515	205	35	90