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TP304 GRADE STAINLESS STEEL SEAMLESS PIPE

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TP316 GRADE STAINLESS STEEL SEAMLESS PIPE

TP316L GRADE STAINLESS STEEL SEAMLESS PIPE

TP316Ti GRADE STAINLESS STEEL SEAMLESS PIPE

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 Grade Stainless Steel Seamless Pipes from China – Reliable Suppliers & Factory Direct Pricing

As a leading supplier and exporter, ZONSUN STEEL is your go-to source for high-quality TP316 stainless steel seamless pipes manufactured in China. Our extensive factory capabilities allow us to provide customizable products, including pipe diameters ranging from 1/2 to 100, designed to meet the specific requirements of your projects. We prioritize adhering to international quality standards, ensuring that all our stainless steel 316 grade products offer exceptional durability and reliability for various applications.

With stock readily available for immediate shipment, we guarantee fast delivery to meet your project timelines. Choose ZONSUN STEEL for all your stainless steel pipe needs and experience the excellence of products sourced directly from trusted suppliers.

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

TP316 Mechanical Properties

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
			Nominal diameter in inches
			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 seamless pipes suitable for marine environments?

ASTM A312 TP316 seamless pipes contain 2.0% to 3.0% molybdenum, which significantly enhances their resistance to chloride-induced pitting and crevice corrosion, making them ideal for high-salinity and marine applications.

What are the mechanical strength properties of TP316 stainless steel?

TP316 has 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 limit is 90 HRB (Rockwell B) or 187 HB (Brinell).

What equivalent international standards correspond to ASTM A312 TP316?

Equivalent grades include Germany's X5CrNiMo17-12-2 (WNr 1.4401), Japan's SUS316, China's 06Cr17Ni12Mo2, and Russia's 08Х17Н13М2.

In what conditions are ASTM A312 TP316 pipes typically delivered?

They are delivered in Cold Drawn, Annealed and Pickled, Polished, Bright Annealed, Sand Blasting, or Shot Blasting conditions depending on customer specifications.

What testing and certification standards are applied to these pipes?

The pipes undergo 100% PMI (Positive Material Identification) testing, are supplied with EN10204.3.1B Mill Test Certificates, and third-party inspection is widely accepted.