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ASTM A269/270/213 TP316L Stainless Steel Seamless Tubes – China Suppliers & Factory with Fast Delivery

We, ZONSUN STEEL, are a leading Supplier and Factory in China, specializing in ASTM A269/270/213 TP316L stainless steel seamless tubes. Our products comply with international standards, ensuring the highest quality for our customers. With a ready stock available for immediate shipment, we guarantee fast delivery to meet your needs efficiently. Trust us for all your stainless steel tube requirements from a reliable supplier in China

Product Detail

Introduction

ASTM A269 TP316L is the low-carbon variant of TP316, designed to eliminate intergranular corrosion (IGC) risks in welded components and sensitized structures. With a carbon content ≤0.035%, it avoids chromium carbide precipitation at grain boundaries, making it ideal for applications where post-weld heat treatment is impractical or corrosive conditions are extremely severe. The inclusion of 2.0–3.0% molybdenum (Mo) ensures superior resistance to pitting, crevice corrosion, and chemical attack, similar to TP316 but with enhanced weldability for critical environments.

Key Features

Low-Carbon Immunity to Intergranular Corrosion (IGC) Carbon ≤0.035% means no chromium carbide (Cr23C6) precipitates at grain boundaries, even after welding or long-term exposure to sensitization temperatures. No post-weld heat treatment is required for most applications, reducing fabrication costs.

Molybdenum-Enhanced Localized Corrosion Resistance Equivalent to TP316 in resistance to pitting/crevice corrosion in chloride environments (e.g., seawater, brine, or bleach solutions), making it suitable for harsh chemical processing.

Superior Weldability Ideal for welded structures (e.g., pipelines, storage tanks) where heat-affected zones (HAZ) would otherwise become IGC-prone in higher-carbon grades. Commonly used in industries where non-destructive testing (NDT) of welds is critical but post-weld annealing is not feasible.

Wide Temperature Range Performance Maintains ductility and toughness from cryogenic (−196°C, e.g., liquid nitrogen systems) to high-temperature service (up to ~650°C continuously, ~870°C short-term).

Austenitic Microstructure Purity Fully austenitic matrix (no harmful phases like σ-phase) after solution annealing, ensuring uniform corrosion resistance and formability.

Material Specification

Standard: ASTM A269 & A270 & A213
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:
- Sanitary & Hygienic Systems
- Food and Beverage Processing
- Semiconductor & Electronics
- Food & Dairy Plants
- Pharmaceutical Plant
- Maritime & Offshore Applications
- Medical & Laboratory Equipment
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

CHEMICAL COMPOSITION - TP316L (ASTM A269/A269M)

HEAT NO.		CHEMICAL COMPOSITION (%)
HEAT NO.		C	Mn	P	S	Si	Ni	Cr	Mo
STAND.	MIN.						10.00	16.00	2.0
STAND.	MAX.	0.035^B	2.00	0.045	0.030	1.00	15.00	18.00	3.0

CHEMICAL COMPOSITION - TP316L (ASTM A213 & 270)

HEAT NO.		CHEMICAL COMPOSITION (%)
HEAT NO.		C	Mn	P	S	Si	Ni	Cr	Mo
STAND.	MIN.						10.00	16.00	2.0
STAND.	MAX.	0.035^D	2.00	0.045	0.030	1.00	14.00	18.00	3.0

Mechanical Properties

Mechanical Properties
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness MAX
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Rockwell (HRB)	Brinell (HBW)
ASTM A269 TP316L				90	192
ASTM A213 TP316L	485	170	35	90	192
ASTM A270 TP316L	485	170	35	B90

Equivalent Grades

ASTM A269 & A270 & A213 TP316L Equivalent Grades
USA (ASTM / AISI)	Germany (DIN, WNr)	Japan (JIS)	France (AFNOR)	England (BS)	Euronorms (EN)	China (GB)	International (ISO)
TP316L 316L S31603	1.4404	SUS316L	Z2CND17-12	316S11	X2CrNiMo17-12-2	022Cr17Ni12Mo2	X2CrNiMo17-12-2 S31603

ASTM A269/A269M Standard Cold Machining Size Deviation Permitted

ASTM A269/A269M Standard cold machining size deviation permitted
Group	Size, Outside Diameter, in. [mm]	Permissible Variations in Outside Diameter, in. [mm]	Permissible Variations in Wall Thickness, A %	Permissible Variations in Cut Length, in. [mm] B		Thin Walled Tubes C
Group	Size, Outside Diameter, in. [mm]	Permissible Variations in Outside Diameter, in. [mm]	Permissible Variations in Wall Thickness, A %	Over	Under	Thin Walled Tubes C
1	Up to 1/2 [13]	±0.005 [0.13]	±15	1/8 [3.2]	0	...
2	1/2 to 1 1/2 [13 to 38], excl	±0.005 [0.13]	±10	1/8 [3.2]	0	less than 0.065 in. [1.65mm] nominal
3	1 1/2 to 3 1/2 [38 to 89], excl	±0.010 [0.25]	±10	3/16 [4.8]	0	less than 0.095 in. [2.41 mm] nominal
4	3 1/2 to 5 1/2 [89 to 140], excl	±0.015 [0.38]	±10	3/16 [4.8]	0	less than 0.150 in. [3.81 mm] nominal
5	5 1/2 to 8 [140 to 203], excl	±0.030 [0.76]	±10	3/16 [4.8]	0	less than 0.150 in. [3.81 mm] nominal
6	8 to 12 [203 to 305], excl	±0.040 [1.01]	±10	3/16 [4.8]	0	less than 0.200 in. [5.08 mm] nominal
7	12 to 14 [305 to 356], excl	±0.050 [1.26]	±10	3/16 [4.8]	0	less than 0.220 in. [5.59 mm] nominal

ASTM A270/A270M Standard Cold Machining Size Deviation Permitted

ASTM A270/A270M Standard cold machining size deviation permitted
Size, Outside Diameter, in. [mm]	Permissible Variations in Outside Diameter, in. [mm]		Permissible Variations in Cut Length, in. [mm] A
Size, Outside Diameter, in. [mm]	Over	Under	Over	Under
1.000 [25] and under	0.005 [0.13]	0.005 [0.13]	1/8 [3]	0
Over 1 [25] to 2 [50]	0.008 [0.20]	0.008 [0.20]	1/8 [3]	0
Over 2 [50] to 3 [75]	0.010 [0.25]	0.010 [0.25]	1/8 [3]	0
Over 3 [75] to 4 [100]	0.015 [0.38]	0.015 [0.38]	1/8 [3]	0
Over 4 [100] to 5 1/2 [140], excl	0.015 [0.38]	0.015 [0.38]	3/16 [5]	0
5 1/2 [140] to 8 [200], excl	0.030 [0.75]	0.030 [0.75]	3/16 [5]	0
8 [200] to 12 [300]	0.050 [1.25]	0.050 [1.25]	3/16 [5]	0

Frequently Asked Questions (FAQ)

What is the difference between TP316 and TP316L?

TP316L is the low-carbon version of TP316. It contains a maximum carbon content of 0.035%, compared to TP316's maximum of 0.08%. This lower carbon level minimizes chromium carbide precipitation during welding, preventing intergranular corrosion in the heat-affected zone.

Why is Molybdenum added to ASTM A269 TP316L?

Molybdenum (2.0–3.0%) is added to enhance the alloy's resistance to localized corrosion, such as pitting and crevice corrosion, especially in environments containing chlorides, sea water, or acidic chemical solutions.

Does ASTM A269 TP316L require post-weld heat treatment?

Generally, no. Because of its extremely low carbon content, it is highly immune to sensitization and chromium carbide precipitation during welding. This makes post-weld annealing unnecessary for most standard welded fabrications.

What are the primary applications of ASTM A269 TP316L tubing?

It is widely used in high-purity and corrosive environments, including sanitary and hygienic systems, food and beverage processing, pharmaceutical plants, semiconductor manufacturing, and marine or offshore pipelines.

What testing and inspections are performed on these tubes?

Standard quality protocols include 100% PMI (Positive Material Identification) testing, dimensional checks, visual inspection, and compliance certification under EN10204 3.1B. Third-party inspections are also widely accepted.