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TP304 GRADE STAINLESS STEEL SEAMLESS PIPE

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TP316L GRADE STAINLESS STEEL SEAMLESS PIPE

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TP310S GRADE STAINLESS STEEL SEAMLESS PIPE

TP321 GRADE STAINLESS STEEL SEAMLESS PIPE

904L/N08904 GRADE SS SMLS PIPE

S31803 GRADE Duplex SS SMLS PIPE

S32205 GRADE Duplex SS SMLS PIPE

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TP316 Stainless Steel Seamless Pipe - Quality Factory Supplier from China for Custom Sizes and Fast Delivery

ZONSUN STEEL is a leading supplier and exporter of TP316 stainless steel seamless pipes from China, adhering to international standards. As a trusted factory and stockist, we provide a comprehensive range of stainless steel 316 grade products designed to meet exact project requirements. Our customizable pipes come in diameters ranging from 1/2 to 100, ensuring versatility for various applications. We prioritize quality, ensuring all our products meet stringent durability and operational reliability standards.

With stock readily available for immediate shipment, we guarantee fast delivery to meet your project's timelines.

Product Detail

Introduction

ASTM A312 TP316 seamless pipes is an austenitic alloy renowned for its exceptional performance in harsh industrial environments. While sharing similarities with other stainless steel grades, this variant distinguishes itself through the addition of 4% molybdenum, which significantly enhances resistance to chloride-induced corrosion—a critical feature for marine applications. Its ability to withstand prolonged submersion, high-pressure conditions, and temperature extremes makes it a preferred choice for offshore platforms, chemical processing systems, and desalination infrastructure.

Key Features

Composition: 18% chromium for foundational rust resistance, complemented by 3% molybdenum for advanced protection against pitting in corrosive environments (e.g., saltwater).

Mechanical Strength: Superior tensile properties minimize structural fatigue under continuous stress, outperforming conventional austenitic steels.

Versatility: Adaptable to industries requiring long-term material stability, such as pharmaceuticals, oil and gas, and wastewater treatment.

Material Specification

Standard: ASTM A312/A312M

O.D: 1/8" NB TO 32" NB , (10.29MM-812.80MM) ,(Customization Available)

W.T: SCH 10S, SCH 40S, SCH 80S, SCH160, SCH XXS (Customization Available)

Application: Chemical & Petrochemical
Marine & Offshore
Power Generation
Pharmaceutical & Food Processing
Oil & Gas
Aerospace
Pulp & Paper
Medical & Pharmaceutical

End: Plain End, Beveled End, Threaded

Processing: Cut-to-length;Polishing.

Inspection: 100% PMI TESTED
EN10204.3.1B MILL TEST CERTIFICATE
THIRD PARTY INSPECTION ACCEPTED

Delivery Condition: Cold Drawn, Annealed and Pickled/ Polished /Bright Annealed/ Sand blasting/ Shot Blasting.

Marking: All SS SMLS Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or as per the customer’s request)

Packing: Packed in Wooden Boxes, plywood cases, Steel Strips Bundled, or as per Customers Requests

Specials: Sizes and Specifications other than above can be customized on request.

Specification Parameters

TP316 Chemical Composition

HEAT NO.		CHEMICAL COMPOSITION (%)
STAND.	MIN. / MAX.	C	Mn	P	S	Si	Ni	Cr	Mo
TP316	MIN.	-	-	-	-	-	10.00	16.00	2.0
TP316	MAX.	0.080	2.00	0.045	0.030	1.00	14.00	18.00	3.0

TP316 Mechanical Properties

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Rockwell B (HR B)	Brinell (HB)
TP316	515	205	35	90	187

Equivalent Grades - (ASTM A312 TP316 Equivalent Grades)

USA (ASTM / AISI)	Germany (DIN, WNr)	Japan (JIS)	France (AFNOR)	England (BS)	Euronorms (EN)	China (GB)	India (IS)	International (ISO)	Russia (GOST)
TP316 / 316	X5CrNiMo17-12-2 (1.4401)	SUS316	Z7CND17-11-02	316S31 / 316S33	1.4401	06Cr17Ni12Mo2	04Cr17Ni12Mo2	X5CrNiMo17-12-2	08Х17Н13М2

Comparison Table Of American Standard Dimensions - (ANSI B36.19 & ANSI B36.10)

OD DN	IN	OD MM	ANSI B36.19									ANSI B36.10
			5s		10s		Sched.40s		Sched.40	Sched.80s		Sched.80	10		20		30		Standard
			mm	Kg/m	mm	Kg/m	mm	Kg/m	mm	mm	Kg/m	mm	mm	Kg/m	mm	Kg/m	mm	Kg/m	mm	Kg/m
6	1/8"	10.29	-	-	1.24	0.281	1.73	371	1.73	2.41	0.467	2.41	-	-	-	-	-	-	1.73	0.371
8	1/4"	13.72	-	-	1.65	0.499	2.24	0.644	2	3.02	0.809	3.02	-	-	-	-	-	-	2.24	0.644
10	3/8"	17.14	-	-	1.65	0.64	2.31	0.858	2.31	3.2	1.118	3.2	-	-	-	-	-	-	2.31	0.858
15	1/2"	21.34	1.65	0.814	2.11	1.016	2.77	1.26	2.77	3.73	1.62	3.73	-	-	-	-	-	-	2.77	1.26
20	3/4"	26.67	1.65	1.034	2.11	1.298	2.87	1.68	2.87	3.91	2.19	3.91	-	-	-	-	-	-	2.87	1.68
25	1"	33.4	1.65	1.312	2.77	2.125	3.38	2.5	3.38	4.55	3.23	4.55	-	-	-	-	-	-	3.36	2.5
32	1 1/4"	42.16	1.65	1.674	2.77	2.732	3.56	3.38	3.56	4.85	4.46	4.85	-	-	-	-	-	-	3.56	3.38
40	1 1/2"	48.26	1.65	1.926	2.77	3.155	3.68	4.05	3.68	5.08	5.4	5.08	-	-	-	-	-	-	3.68	4.05
50	2"	60.32	1.65	2.424	2.77	3.992	3.91	5.43	3.91	5.54	7.47	5.54	-	-	-	-	-	-	3.91	5.43
65	2 1/2"	73.02	2.11	3.747	3.05	5.345	5.16	8.62	5.16	7.01	11.4	7.01	-	-	-	-	-	-	5.16	8.62
80	3"	88.9	2.11	4.585	3.05	6.557	5.49	11.28	5.49	7.62	15.25	7.62	-	-	-	-	-	-	5.49	11.28
90	3 1/2"	101.6	2.11	5.272	3.05	7.526	5.74	13.56	5.74	8.08	18.62	8.08	-	-	-	-	-	-	5.74	13.56
100	4"	114.3	2.11	5.945	3.05	8.496	6.02	16.06	6.02	8.56	22.29	8.56	-	-	-	-	-	-	6.02	16.06
125	5"	141.3	2.77	9.639	3.4	11.74	6.55	21.76	6.55	9.52	30.92	9.52	-	-	-	-	-	-	6.55	21.76
150	6"	168.28	2.77	11.514	3.4	14.037	7.11	28.23	7.11	10.97	42.52	10.97	-	-	-	-	-	-	7.11	28.23
200	8"	219.08	2.77	15.049	3.76	20.334	8.18	42.49	8.18	12.7	64.57	12.7	-	-	6.35	33.28	7.04	36.8	8.18	42.4
250	10"	273.05	3.4	23.028	4.19	28.29	9.27	60.24	9.27	12.7	81.46	15.09	-	-	6.35	41.7	7.8	51	9.27	60.24
300	12"	323.85	3.96	31.806	4.57	36.633	9.52	73.76	10.31	12.7	97.36	17.48	-	-	6.35	49.68	8.38	65.14	9.52	73.76
350	14"	355.6	3.98	34.99	4.78	42.102	9.52	-	11.13	-	-	19.05	6.35	54.63	7.92	67.98	9.52	81.21	9.52	81.21
400	16"	406.4	4.19	42.35	4.78	48.22	9.52	-	12.7	-	-	21.44	6.35	62.58	7.92	77.9	9.52	93.13	9.52	93.18
450	18"	457.2	4.19	47.7	4.78	54.3	9.52	-	14.27	-	-	23.82	6.35	70.5	7.92	87.8	11.13	122.12	9.52	105.05
500	20"	508	4.77	60.32	5.54	69.766	9.52	-	15.09	-	-	26.19	6.35	78.47	9.52	116.97	12.7	155	9.52	116.97
550	22"	558.8	4.77	-	5.54	-	9.52	-	-	-	-	28.58	6.35	86.42	9.52	128.89	12.7	170.86	9.52	128.89
600	24"	609.6	5.54	84.1	6.35	96.215	9.52	-	17.48	-	-	30.96	6.35	96.215	9.52	140.8	14.7	209.54	9.52	140.81
650	26"	660.4	-	-	-	-	9.52	-	-	-	-	-	7.92	127.58	12.7	202.65	-	-	9.52	152.73
700	28"	711.2	-	-	-	-	9.52	-	-	-	-	-	7.92	137.52	12.7	218.54	15.88	271.94	9.52	164.65
750	30"	762	6.35	120.59	7.92	147.45	9.52	-	-	-	-	-	7.92	147.45	12.7	234.44	15.88	291.81	9.52	176.57
800	32"	812	-	-	-	-	9.52	-	17.48	-	-	-	7.92	157.39	12.7	250.33	15.88	311.67	9.52	188.5
850	34"	863.6	-	-	-	-	9.52	-	17.48	-	-	-	7.92	167.32	12.7	266.22	15.88	331.54	9.52	200.42
900	36"	914.4	-	-	-	-	9.52	-	19.05	-	-	-	7.92	177.26	12.7	282.18	15.88	351.41	9.52	212.34

ASTM A312/A312M Standard Cold Machining Size Deviation Permitted

ASTM A312/A312M-09 Standard Permitted Tolerance of WT and OD
Nominal Outside Diameter		Allowable deviation	Nominal wall thickness		Allowable deviation
1/8”—1 1/2“	(10.29—48.26)	+0.4 -0.8	1/8”—1 1/2“	(10.29-73.03) all of t	+20 -12.5
>1 1/2“—4”	(48.26—114.3)	±0.8	3“—18”	(88.9-457.2) t/D=5%	+22.5 -12.5
>4”—8"	(114.3—219.08)	+1.6 -0.8	3“—18”	(88.9-457.2) t/D>5%	+15 -12.5
>8“—18"	(219.08—457.2)	+2.4 -0.8	≥20"	=508 t of wld pipe	+17.5 -12.5
>18”—26“	(457.2—660.4)	+3.2 -0.8	≥20"	=508 t/D=5%	+22.5 -12.5
>26”—34”	(660.4—863.6)	+4.0 -0.8	≥20"	=508 t/D>5%	+15 -12.5
>34“—48"	(863.6—1219.2)	+4.8 -0.8
Thin wall pipe (t/D=3%) ovality condition: Any cross section in a steel pipe Dmax Dmin=1.5%nominal,and(Dmax Dmin)/ 2 conforms to the stipulated diameter tolerance range.

Frequently Asked Questions (FAQ)

What makes ASTM A312 TP316 suitable for marine applications?

ASTM A312 TP316 features a 4% molybdenum addition, which significantly improves resistance to chloride-induced corrosion and pitting, making it ideal for marine environments and prolonged saltwater submersion.

What is the standard chemical composition of TP316 stainless steel?

According to the standard specifications, TP316 contains a minimum of 16.00% Chromium (Cr), 10.00% Nickel (Ni), and 2.0% Molybdenum (Mo), with controlled maximum limits for Carbon (0.080%), Manganese (2.00%), and Silicon (1.00%).

What are the mechanical properties of ASTM A312 TP316?

TP316 seamless pipes offer a minimum tensile strength of 515 MPa, a minimum yield strength of 205 MPa (0.2% Proof), and a minimum elongation of 35%. The maximum hardness is 90 HRB (Rockwell B) or 187 HB (Brinell).

What are the equivalent international grades for ASTM A312 TP316?

Equivalent grades include SUS316 in Japan (JIS), X5CrNiMo17-12-2 (1.4401) in Germany (DIN/EN), Z7CND17-11-02 in France (AFNOR), 316S31/316S33 in England (BS), 06Cr17Ni12Mo2 in China (GB), and 08Х17Н13М2 in Russia (GOST).

What are the available delivery conditions and packing methods?

Pipes can be delivered in Cold Drawn, Annealed and Pickled, Polished, Bright Annealed, Sand Blasting, or Shot Blasting conditions. They are typically packed in wooden boxes, plywood cases, steel strips bundled, or as per customer request.