TP317L Seamless Stainless Steel Pipe

TP317L Seamless Stainless Steel Pipe is a premium-grade, low-carbon, molybdenum-alloyed austenitic tube designed for superior corrosion resistance in aggressive environments.
①　STANDARD: ASTM A312/ ASTM A249/ ASTM A269/ EN10216-5/GOST 9940 /GOST 9941...

②　OD RANGE : 6-1016 MM

③　THICKNESS RANGE: 1-65 MM

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TP317L/S31703/1.4438/ X2CrNiMo 19-14-4 Chemical Composition

C	Si	Mn	P	S	Cr	Mo	Ni
≤0.035	≤0.075	≤ 2.00	≤0.04	≤0.03	18.00-20.00	3.00-4.00	11.00-15.00

TP317L/S31703/1.4438/ X2CrNiMo 19-14-4 Mechanical Properties

Tensile Strength ksi (Mpa)	Yield Strength ksi (Mpa)	Elongation -% in 50 mm	Hardness (Brinell)	Hardness Rockwell
≥75(515)	≥30(205)	≥35	≤ 192HBW/200HV	≤ 90HRB

TP317L/S31703/1.4438/ X2CrNiMo 19-14-4 Applications

317L stainless steel, also known as UNS S31703, is a low-carbon, high-alloy austenitic stainless steel. It contains higher levels of chromium, nickel, and molybdenum compared to standard 304/304L stainless steel. Here’s how it is used in various industries:

Chemical and Petrochemical Industry:

Corrosion Resistance: 317L is highly resistant to corrosion in aggressive chemical environments, making it suitable for applications involving acids, chlorides, and other corrosive media.
Heat Exchangers: It is commonly used in heat exchangers, condensers, and other equipment where resistance to chloride-induced stress corrosion cracking (SCC) is critical.
Flue Gas Desulfurization (FGD): 317L is employed in FGD systems due to its resistance to sulfuric acid and other acidic gases.

Oil and Gas Industry:

Downhole Equipment: 317L is used in downhole components such as tubing, casing, and pipelines due to its excellent resistance to pitting, crevice corrosion, and sulfide stress cracking.
Seawater Applications: Its resistance to seawater and brine environments makes it suitable for offshore platforms, subsea pipelines, and marine equipment.

Pharmaceutical and Biotechnology Industry:

Cleanliness and Sterility: 317L is preferred for pharmaceutical and biotech applications due to its low carbon content, which minimizes carbide precipitation during welding and maintains cleanliness.
Bioprocessing Equipment: It is used in vessels, tanks, and piping systems for drug manufacturing and sterile processing.

Food and Beverage Industry:

Hygienic Surfaces: 317L is employed in food processing equipment, dairy tanks, and brewing vessels due to its smooth surface finish and resistance to corrosion from food acids.

Power Generation:

Boilers and Heat Exchangers: 317L is used in power plants for its high-temperature strength, corrosion resistance, and weldability.
Steam Condensers: Its resistance to chloride stress corrosion cracking is crucial in steam condenser tubes.

Desalination Plants:

Seawater Reverse Osmosis (SWRO): 317L is used in SWRO systems due to its resistance to chloride attack and pitting corrosion.

Remember that the specific application and conditions determine the suitability of 317L stainless steel. Always consult with materials engineers and industry experts to ensure proper material selection for your specific project!

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TP317L/S31703/1.4438/ X2CrNiMo 19-14-4 Material Summary

317L (UNS S31703) is a low carbon corrosion resistant austenitic chromium-nickel-molybdenum stainless steel. The high levels of these elements assure the steel has superior chloride pitting and general corrosion resistance to the conventional 304/304L and 316/316L grades. The steel provides improved resistance relative to 316L in strongly corrosive environments containing sulfurous media, chlorides, and other halides.

The low carbon content of 317L enables it to be welded without intergranular corrosion resulting from chromium carbide precipitation enabling it to be used in the as-welded condition.

The grade 317L is non-magnetic in the annealed condition. It cannot be hardened by heat treatment; however the material will harden due to cold working. 317L can be easily welded and processed by standard shop fabrication practices.

Seamless 654SMO Super Stainless Steel Tube

Seamless 654SMO Super Stainless Steel Tube UNS S32654, W. Nr. 1.4652) is a high-performance super austenitic stainless steel alloy, often classified as a "super stainless steel" due to its exceptional corrosion resistance and mechanical strength. Developed for the most demanding environments, it features unusually high levels of chromium (24%), molybdenum (7-8%), nickel (23%), and nitrogen (0.45-0.55%), enabling pitting resistance equivalent number (PREN) values exceeding 50—comparable to top nickel-based alloys like Hastelloy. The seamless design ensures superior integrity for high-pressure, high-temperature, and corrosive applications, avoiding weld-related vulnerabilities. It is twice as strong as conventional austenitic grades like 304 or 316 while maintaining excellent ductility and toughness.
①　STANDARD: ASTM A312/EN10216-5/GBT14976.

②　OD RANGE : 6.35-257MM

③　THICKNESS RANGE: 0.89-35MM

253MA Seamless Stainless Steel Tube

253MA Seamless Stainless Steel Tube is a tube which features seamless construction, excellent heat and corrosion resistance, and long-lasting durability.
①　STANDARD: ASTM A213/ EN10216-5/ ASTM A249/ ASTM A269/EN10216-5/ GOST 9940 /GOST 9941...

②　OD RANGE : 6-257MM

③　THICKNESS RANGE: 1-35 MM