TP310 Seamless Stainless Steel Tube

UNS S31000 | 1.4841 | ASTM A213

TP310 Seamless Stainless Steel Tube (S31000 / 1.4841) is manufactured to ASTM A213 from stainless steel billet, cold-drawn to the required outside diameter and wall thickness. Supplied from our Wenzhou mill with EN 10204 3.1 mill test certificate, PMI and dimensional inspection on request.

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What Is a Seamless Stainless Steel TP310 Tube?

TP310 (UNS S31000) is a 25Cr-20Ni austenitic stainless steel tube designed for sustained service at elevated temperature. Its balanced chromium and nickel contents provide excellent resistance to oxidation, sulfidation and carburization, and the fully austenitic structure retains good toughness across a wide temperature range.

Seamless Stainless Steel TP310 Tube (also called Seamless 1.4841 Stainless Steel Tube)is a high-temperature, corrosion-resistant tube crafted from a single, solid billet of a high-chromium and high-nickel austenitic stainless steel. Unlike welded tubes, it has no weld joint, ensuring superior structural integrity and reliability, especially under high-stress and high-temperature conditions. The"310"designation refers to a specific grade known for its exceptional oxidation resistance and strength at elevated temperatures. Its balanced composition provides it with a notable ability to resist oxidation up to 2000°F (1100°C) and to withstand high-temperature carburization. This makes it a top choice for demanding applications in industrial furnaces, power generation, and heat treatment.

TP310 Key Features and Technical Advantages

Feature	Description
Excellent High-Temperature Oxidation Resistance	The 25Cr-20Ni balance forms a protective scale that resists scaling and spalling in continuous and cyclic high-temperature service.
Good High-Temperature Strength	The fully austenitic structure maintains useful strength and creep resistance at elevated temperature for furnace and boiler components.
Resistance to Carburization and Sulfidation	High alloy content provides protection in carbon-rich and sulphur-bearing atmospheres typical of petrochemical and heat-treating service.
Good Toughness Over a Wide Temperature Range	The stable austenitic structure retains ductility from cryogenic temperature up to the oxidation limit of the alloy.
Reliable Fabrication and Welding	TP310 welds readily with standard austenitic procedures and retains its properties in the fabricated joint.

TP310 Product Specifications and Data

To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for Stainless Steel 310.

The composition of Stainless Steel 310 is carefully balanced to achieve its superior high-temperature oxidation resistance and strength.

Cr	Ni	Mn	Si	P	S	Fe	C
24.00 - 26.00	19.00 - 22.00	≤ 2.00	≤ 1.50	≤ 0.045	≤ 0.030	Bal	≤ 0.25

Stainless Steel 310 is specifically designed to maintain its strength and shape in high-stress, high-temperature environments.

Tensile Strength	Yield Strength	Elongation	Hardness
≥ 520 MPa	≥ 205 MPa	≥ 30%	≤ 217 HBW

These physical properties highlight the material's ability to perform reliably under a wide range of conditions.

Density	Melting Point	Thermal Expansion	Thermal Conductivity	Modulus of Elasticity	Electrical Resistivity
7.9 g/cm³	1400 - 1450 °C approx.	16.5 µm/m·°C (20-100°C)	14.2 W/m·K (20°C)	200 GPa	0.78 x 10⁻⁶ Ω·m (20°C)

Standard	OD(D)	Tolerance（MM)		Thickness(S)	Tolerance(MM)	Length	Tolerance
Standard	MM	Common	High	MM	Tolerance(MM)	Length	MM
EN 10216-5 HFD	30≤D≤219.1（D2)	±1.0% or ±0.5mm, whicever is the greater		T1, T≤4	±15% or ±0.6mm, whicever is the greater	L≤6M	+5/0
	30≤D≤219.1（D2)	±1.0% or ±0.5mm, whicever is the greater		T2	±12.5% or ±0.4mm, whicever is the greater	L≤6M	+5/0
	219.1≤D≤610 (D1)	±1.5% or ±0.75mm, whicever is the greater		T≤0.05D	+22.5%/-15%	6＜l≤12	+10/0
				T1, 0.05D＜t≤0.09D	±15% or ±0.6mm, whicever is the greater	6＜l≤12	+10/0
				T2, T>0.09D	±12.5% or ±0.4mm, whicever is the greater	L>12	+by agreement/0
EN 10216-5 CFD	D3(D≤219.1)	±0.75% or ±0.3mm, whicever is the greater		T3	±10% or ±0.2mm, whicever is the greater
EN 10216-5 CFD	D4(D≤219.1)	±0.5% or ±0.mm, whicever is the greater		T4	±7.5% or ±0.15mm, whicever is the greater
ASTM A213 HFD	D≤100	+0.4/-0.8		D＜100,S≤2.4	+40%/0	HFD, all size	+5.0/0
		+0.4/-1.2		D＜100,2.4＜s≤3.8	+35%/0
		+0.4/-1.6		D＜100,3.8＜s≤4.6	+33%/0
		+0.4/-1.6		D＜100,S>4.6	+28%/0
	100＜d≤200	+0.4/-1.2		D>100, 2.4＜s≤3.8	+35%/0
	200＜d≤225	+0.4/-1.6		D>100,3.8＜s≤4.6	+33%/0
	200＜d≤225	+0.4/-1.6		D>100,S>4.6	+28%/0
ASTM A213 CFD	D＜25	±0.10		D≤38.1	+20%/0	CFD, D＜50.8	+3.0/0
	25≤D≤40	±0.15
	40＜d＜50＜ span="">	±0.20
	50≤D＜65	±0.25
	65≤D＜75	±0.30		D>38.1	+22%/0	CFD, D≥50.8	+5.0/0
	75≤D≤100	±0.38
	100＜d≤200	+0.38/-0.64
	200＜d≤225	+0.38/-1.14
ASTM A269	D≤13	±0.13		D≤13	±15%	D＜38	+3.2/0
	13＜d＜38＜ span="">	±0.13		13＜d＜356＜ span="">	±10%	D＜38	+3.2/0
	38≤D＜89	±0.25				D>38	+4.8/0
	89≤D＜140	±0.38
	140≤D＜203	±0.76
	203≤D＜305	±1.01
	305≤D＜356	±1.26
ASTM A270	D＜25	±0.13		For weld pipe all size	±12.5%		+3.0/0
	25-50	±0.20
	50-75	±0.25
	75-100	±0.38		For CD SMLS pipe D≤38.1	+20%/0
	100-140	±0.38		For CD SMLS pipe D≤38.1	+20%/0		+5.0/0
	140-200	±0.75		For CD SMLS pipe D>38.1	+22%/0
	200-300	±1.25		For CD SMLS pipe D>38.1	+22%/0

TP310 Dimensional Standards and Tolerances

TP310 seamless tubes are supplied to the dimensional tolerances of ASTM A213 / A1016 unless a tighter project specification applies.

TP310 Common Industrial Applications

Industry	Typical Applications
Heat Treating Industry	Radiant tubes, muffles and retorts Furnace internals and supports Heat-treatment fixtures
Power Generation	Boiler and superheater components Reheater tubing Steam generator parts
Chemical and Petrochemical Processing	Furnace tubing and burner components High-temperature reactor internals Reforming furnace parts
Cement and Lime Industry	Kiln internals High-temperature process equipment Calciner parts

TP310 Quality Assurance and Production Process

Process Step	Description
Certification	All TP310 tubes are supplied to ASTM A213 / ASME SA213 and ASTM A312 / ASME SA312 with EN 10204 3.1 mill test certificates. Third-party inspection (SGS, BV, TUV, Lloyd's), PMI reports and full heat-number traceability can be provided on request.
Non-Destructive Testing (NDT)	Hydrostatic or eddy-current testing is performed on 100% of tubes. Ultrasonic testing (UT) and dye-penetrant inspection (PT) are available for critical service, with records retained for each production lot.
Material Verification	Positive Material Identification (PMI) and spectrometric analysis confirm that the chemical composition matches the ordered grade. Intergranular corrosion (IGC) testing to ASTM A262 Practice E is available for austenitic and nickel-alloy tubes.
Mechanical Testing	Tensile, yield, elongation and hardness tests are carried out per heat. Flattening, flaring and reverse-bend tests verify ductility, while creep-rupture data can be supplied for high-temperature grades.
Dimensional Inspection	Outside diameter, wall thickness, ovality and straightness are measured against ASTM A1016 / A1016M or EN 10216-5 tolerances. Length, square-cut ends and end-finish conditions are verified before packing.

TP310 vs TP310S / TP310H – Technical Comparison

TP310 is the original 25Cr-20Ni austenitic grade. TP310SandTP310H are the low-carbon and controlled-carbon derivatives developed to remove its limitations.

Carbon Content

TP310: up to 0.25% C — highest strength, greatest sensitisation risk
TP310S: 0.08% C maximum — optimised for weldability
TP310H: 0.04–0.10% C — optimised for creep strength

Why the Derivatives Exist

The carbon level that gives TP310 its strength is also what makes it prone to chromium carbide precipitation at grain boundaries. TP310S addresses that by lowering carbon, while TP310H goes the other way — controlling carbon within a defined band to maximise creep resistance without the scatter of the original grade.

Selection Guide

Specify TP310S for welded high-temperature equipment
Specify TP310H for superheater, reheater and other creep-limited tubing
Retain TP310 only where an existing specification or drawing calls for it

Frequently Asked Questions About TP310 Seamless Stainless Steel Tubes

What is TP310 seamless tube?

TP310 (UNS S31000) is a 25Cr-20Ni austenitic stainless steel tube produced without a longitudinal weld. The high chromium and nickel contents give it excellent resistance to oxidation, sulfidation and carburization at elevated temperature.

How does TP310 relate to TP310S and TP310H?

TP310 is the original grade. TP310S lowers carbon to a maximum of 0.08% to improve weldability and intergranular corrosion resistance, while TP310H controls carbon in the 0.04–0.10% range to improve creep strength at temperature.

What standard covers TP310 seamless tube?

TP310 is supplied to ASTM A213 / ASME SA213 and ASTM A312 / ASME SA312, with equivalent specifications available on request.

What is TP310 tube used for?

TP310 serves in furnace internals, radiant tubes and retorts, boiler and superheater components, and high-temperature petrochemical equipment where resistance to oxidation and carburization is essential.

Request a TP310 Tube Quotation

Send your Seamless Stainless Steel TP310 Tube enquiry with grade, application, size (OD and wall thickness or schedule), quantity, length, end finish and inspection requirements. Our technical team will confirm availability, testing scope and lead time.

Request a TP310 Tube Quotation