ASTM A268 TP410 Seamless Stainless Steel Tube

UNS S41000 Martensitic Stainless Steel Tubing

ASTM A268 TP410 seamless stainless steel tube is manufactured from UNS S41000, a martensitic chromium stainless steel containing 11.5–13.5% chromium.

As a heat-treatable grade, TP410 offers higher mechanical strength than ferritic stainless steels and is commonly specified in applications where strength, wear resistance, and oxidation resistance are more critical than maximum corrosion performance.

Our TP410 seamless tubes are produced strictly in accordance with ASTM A268 and ASTM A1016/A1016M, ensuring dimensional accuracy, mechanical compliance, and full traceability.

What Is ASTM A268?

ASTM A268 is the standard specification covering seamless and welded ferritic and martensitic stainless steel tubing intended for:

• General service applications

• Heat-resistant service

• Moderate corrosive environments

Unlike austenitic stainless steel standards (such as ASTM A213), ASTM A268 emphasizes:

• Oxidation resistance

• Mechanical strength

• Structural reliability under temperature stress

This makes TP410 suitable for refinery systems, power plant components, and heat transfer equipment operating under moderate corrosion exposure.

Material Overview – TP410 (UNS S41000)

TP410 is a straight chromium martensitic stainless steel characterized by:

• No intentional nickel addition

• Heat-treatable martensitic structure

• High hardness after quenching

• Good wear resistance

• Moderate corrosion resistance

Compared with austenitic grades (e.g., 304/316), TP410 offers:

• Higher hardness potential

• Better resistance to abrasion

• Lower material cost

• Reduced corrosion resistance in chloride environments

It is often selected as a cost-effective alternative in mildly corrosive industrial systems.

Chemical Composition of TP410 (%)

The chromium content provides oxidation resistance, while controlled carbon content enables hardening through heat treatment.

Mechanical Properties (Annealed Condition – Minimum)

Actual mechanical properties may vary depending on heat treatment condition.

Compared with ferritic grades such as TP430, TP410 provides significantly higher strength and hardness after heat treatment.

Heat Treatment Characteristics

ASTM A268 TP410 seamless tubes are typically supplied in the annealed condition.

For enhanced performance, the material can undergo:

• Hardening (Quenching)

• Tempering

Unlike austenitic stainless steels, TP410 can be strengthened through heat treatment, making it suitable for components requiring:

• Increased wear resistance

• Higher structural rigidity

• Improved fatigue strength

Proper heat treatment control is critical to balance hardness and toughness.

Size Range & Supply  Range

• Outside Diameter: 1/4” – 8” (6.35 mm – 203 mm)

• Wall Thickness: 0.5 mm – 12 mm

• Manufacturing Type: Seamless

• Tube Ends: Plain, beveled, threaded

• Length: Random, fixed, or cut length

Dimensional tolerances comply with:

• ASTM A268

• ASTM A1016/A1016M

Custom sizes and special tolerance requirements are available upon request.

Quality Assurance & Testing

Each ASTM A268 TP410 seamless stainless steel tube is subjected to:

• Tensile testing

• Hardness testing

• Flaring test (for seamless tubes)

• Hydrostatic or Non-Destructive Testing (NDT)

• Intergranular corrosion testing (if required by specification)

Material Test Certificates are issued according to EN 10204 3.1 or 3.2, ensuring full traceability of raw materials and production batches.

Typical Applications of TP410 Stainless Steel Tubing

• Heat exchanger tubing

• Refinery process equipment

• Power generation systems

• Boiler components

• Mechanical tubing

• Valve and pump parts

TP410 is commonly selected for industrial environments where:

• Mechanical strength is a priority

• Oxidation resistance is required

• Corrosion exposure is moderate rather than severe

TP410 vs TP430 – Material Comparison

TP410 is preferred when higher hardness and strength are required, while TP430 is more suitable for mild atmospheric corrosion environments.