UNS S31635|1.4571|TP316Ti Seamless Stainless Steel Pipe

Seamless Stainless Steel TP316Ti Pipes (UNS S31635 / W.Nr. 1.4571) are high-performance austenitic solutions specifically engineered for superior resistance to pitting and intergranular corrosion. As a premier manufacturer based in Wenzhou, China, XinZhe produces high-integrity seamless piping that strictly adheres to ASTM A312 and ASME SA312 international standards.

Distinguished by the strategic addition of Titanium (Ti), our TP316Ti tubing prevents carbide precipitation during prolonged exposure to temperatures in the 425°C - 815°C (800°F - 1500°F) range. This makes them indispensable for mission-critical applications in pharmaceutical processing, chemical reactors, and marine environments where standard 316 grades may fail. Through advanced cold-drawing and precise solution annealing, XinZhe ensures every pipe maintains a uniform microstructure and optimized creep strength, providing a reliable choice for aggressive industrial media.

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What Is Seamless Stainless steel TP316Ti pipe?

Seamless Stainless Steel TP316Ti (UNS S31635) Pipe – Titanium Stabilized High-Temperature Corrosion Resistant Solution

What is Seamless Stainless Steel TP316Ti Pipe?

Seamless Stainless Steel TP316Ti Pipe (UNS S31635) is a titanium-stabilized austenitic stainless steel pipe manufactured through hot piercing and cold rolling processes from solid billets. As an advanced modification of Type 316 stainless steel, TP316Ti is specifically designed to prevent intergranular corrosion (IGC) in high-temperature environments.

Unlike 316L stainless steel, which relies on low carbon content, TP316Ti incorporates titanium (Ti) as a stabilizing element. Titanium preferentially reacts with carbon to form stable titanium carbides, effectively preventing chromium carbide precipitation at grain boundaries during prolonged exposure to temperatures between 425°C – 815°C (800°F – 1500°F).

This makes TP316Ti seamless pipe the preferred choice for high-temperature and corrosive applications where 316L may fail due to sensitization.

Key Advantages of TP316Ti Seamless Pipe

1. Excellent Resistance to Intergranular Corrosion

Titanium stabilization eliminates the risk of sensitization after welding or thermal cycling, ensuring long-term corrosion resistance.

2. Superior Pitting and Crevice Corrosion Resistance

With2.0% – 2.5% molybdenum content, TP316Ti offers enhanced protection in chloride-rich and marine environments.

3. High-Temperature Strength and Stability

Compared to 316L, TP316Ti provides:

Higher tensile and yield strength
Improved creep resistance
Better performance under continuous high-temperature exposure

4. Seamless Manufacturing Integrity (ASTM A312)

Produced via seamless processes, TP316Ti pipes:

Eliminate weld seam defects
Withstand higher pressure applications
Ensure superior structural reliability in critical systems

Product Specifications and Data

To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for TP316Ti stainless steel.

Chemical Composition

The key to 316Ti’s performance is its precise composition, including the crucial addition of titanium.

C	Si	Mn	P	S	Cr	Ni	Mo	Ti	Fe
≤ 0.08	≤ 0.75	≤ 2.00	≤ 0.045	≤ 0.03	16.00 - 18.00	10.00 - 14.00	2.00 - 3.00	5x(C+N) - 0.70	Bal

Typical Mechanical Properties of 316Ti Stainless Steel

Grade 316Ti offers a balance of strength and ductility, making it a reliable solution for various industrial applications.

Tensile Strength	Yield Strength	Elongation	Rockwell Hardness	Brinell Hardness
≥ 515 MPa	≥ 205 MPa	≥ 35%	≤ 90 HRB	≤ 192 HB

Typical Physical Properties of 316Ti Stainless Steel

These physical properties highlight the material's ability to perform reliably across a range of environments.

Density	Melting Point	Thermal Expansion	Thermal Conductivity	Modulus of Elasticity	Electrical Resistivity
8.0 g/cm³	1370-1400 °C	16.5 µm/m·°C (20-100°C)	15.2 W/m·K (100°C)	193 GPa	7.4 x 10⁻⁷ Ω·m (20°C)

Size Tolerance Chart

Standard	OD(D)	Tolerance （MM)		Thickness(S)	Tolerance(MM)	Length	Tolerance
	MM	Common	High	MM			MM
ASTM A312	D ≤48.3	+0.4/-0.8		10.3 ≤73	+20%-12.5%		+6.0/0
	48.3 ≤114.30	±0.8		88.9 ≤457.2,t/D ≤5%	+22.5%/-12.5%
	114.3 ≤219.1	+1.6/-0.8		88.9 ≤457.2,t/D >5%	+15%/-12.5%
	219.1 ≤457.2	+2.4/-0.8		D ≥508, t/D≤5%,SMLS	+22.5%/-12.5%
	457.2 ≤660.4	+3.2/-0.8		D ≥508, t/D>5%,SMLS	+15%/-12.5%
	660.4 ≤863.6	+4.0/-0.8		D ≥508, WELD	+17.5%/-12.5%
	863.6 ≤1219.2	+4.8/-0.8
JIS 3459 Hot-Finished Smls Pipe	D ＜50	±0.51		S ＜4	±0.5
	D ≥50	±1.0%		S ≥4	±12.5%
JIS 3459 Cold-Finished	D ＜30	±0.3		S ＜2	±0.2
	D ≥30	±1.0%		S ≥2	±10.0%
JIS G3463 Hot-Finished Smls Pipe	100	+0.4/-0.8		D ＜100， S	/	D	+7/0
				D ＜100， 2≤S	+40%/0	D	+10/0
				D ＜100， 2.4≤S	+35%/0
				D ＜100， 3.8≤S	+33%/0
				D ＜100， 4.6≤S	+28%/0	D	+13/0
	100 ≤D	+0.4/-1.2		D>100, S ＜2	/
	120 ≤D			D>100 ， 2≤S	/	D	+15/0
	160 ≤D	+0.4/-1.8		D>100 ， 2.4≤S	+35%/0
	200 ≤D	+0.4/-2.4		D>100 ， 3.8≤S	+33%/0	D>50,7	+10/0
				D>100 ， 4.6≤S	+28%/0
JIS G3463 Cold-finished		+0.4/-0.8		D	+0.4/0
	60 ≤D	±0.3		D ≥2.0	+20%/0	D>50,7	+13/0
	80 ≤D	±0.4		D ≥40	+22%/0
	100 ≤D	+0.4/-0.6
	120 ≤D	+0.4/-0.8				D>50,10M	+15/0
	160 ≤D	+0.4/-1.2
	200 ≤D	+0.4/-1.6
GB/T 14975 冷拔(扎)钢管	D	±0.3	±0.1	所有壁厚，普通级PA	+12.5%/-10%
	12.7		±0.15
	38.1	±0.4	±0.3
	88.9	±0.9%	±0.4
	139.7		±0.8	所有壁厚，高级PC	±10%
	203.2		±1.1
	219.1		±1.6
	D ≥323.9		±0.5%
GB/T 14976 冷拔(轧)钢管	6	±0.2	±0.15	S ≤3	±12%(10% /0 高级PC)
	10 ≤D	±0.2	±0.2
	30 ≤D	±0.2	±0.3	S>3	+12.5%/-10%(10%/0 高级PC)
	50 ≤D	0.85%	0.75%
	D>219	0.9%	0.8%	Smin, all	+22%/0(+20%/0 高级PC)

Applications of TP316Ti Seamless Stainless Steel Pipe

Thanks to its outstanding resistance to heat and corrosion, TP316Ti pipe is widely used in:

Chemical & Petrochemical Industry

Handling sulfuric, phosphoric, and organic acids, High-temperature process pipelines

Heat Exchangers & Condensers

Ideal for thermal cycling zones, Resistant to scaling and corrosion

Marine & Offshore Engineering

Excellent resistance to chloride-induced stress corrosion cracking (SCC), Suitable for subsea pipelines and seawater systems

Pharmaceutical & Food Processing

High purity and contamination-free performance, Suitable for sterilization and hygienic systems

Ready to Request a Quotation?

Send your Seamless Stainless steel TP316Ti pipe enquiry with grade, applicable ASTM/ASME standard and edition, OD × wall thickness, length, quantity, end finish, delivery destination and inspection documents — you will get a written quotation stating the specification and edition, delivery condition, documents included and lead time.

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