ASME SA240 410S Stainless Steel Plate | SA240 Type 410S

As a professional stainless steel plate supplier and China Mill-Direct Supply / Mill Direct Exporter, SHH STEEL is pleased to present ASME SA240 410S Stainless Steel Plate, also known as SA240 Type 410S.

ASME SA240 Type 410S is the low-carbon version of the basic martensitic stainless steel Type 410. With a maximum carbon content of 0.08%, Type 410S offers significantly improved weldability and reduced susceptibility to cracking during welding compared with standard Type 410 (which allows up to 0.15% carbon). It still provides moderate corrosion resistance — better than carbon steel — and can be heat treated to increase strength and hardness, although the hardening response is lower than that of higher-carbon 410 due to the reduced carbon level.

Type 410S is magnetic in all conditions and is widely selected for applications that require a combination of moderate corrosion resistance, good strength, and better fabricability/weldability than standard 410. Typical uses include welded structural components, petroleum refining equipment, furnace parts, and general engineering applications where martensitic properties are desired with improved welding performance.

SHH STEEL supplies ASME SA240 410S as true Mill Direct Supply, sourcing directly from major Chinese stainless steel mills. This model delivers competitive mill pricing, consistent quality, full heat traceability and shorter lead times. We offer a practical dimensional range and can supply material in the annealed condition or with specific heat-treatment conditions according to customer requirements.

Heat Analysis (Ladle Analysis) according to ASME SA240 Type 410S:

Product Analysis (typical permissible variations):

The lower carbon limit (≤ 0.08%) is the key difference from standard Type 410. This reduction improves weldability and reduces the risk of hardenability-related cracking, while still allowing useful response to heat treatment.

Annealed Condition (typical)

Hardened & Tempered Condition Type 410S can still be heat treated, but the lower carbon content results in lower maximum hardness and strength compared with standard 410. Useful strength levels can still be achieved for many engineering applications.

Physical Properties

• Density: approximately 7.70–7.75 g/cm³
• Magnetic: Magnetic in all conditions
• Melting Range: approximately 1480–1530°C

ASME SA240 410S is the preferred martensitic grade when welding is required. It offers a practical compromise between the higher hardenability of standard astm a240 type 410 stainless steel sheet plate and the need for improved fabrication performance. For applications demanding maximum hardness, Type 420 is considered. When corrosion resistance is the priority, austenitic grades such as astm a240 type 304 stainless steel sheet plate should be selected.

ASME SA240 Type 410S offers moderate corrosion resistance similar to Type 410 in atmospheric, fresh-water and mild chemical environments. It performs better than carbon steels but is significantly less resistant than austenitic grades (304/316) in chloride or strongly corrosive media.

In the hardened and tempered condition, corrosion resistance is generally lower than in the fully annealed condition. The grade is not recommended for continuous exposure to seawater or aggressive acidic chloride environments.

ASME SA240 Type 410S has noticeably better weldability than standard Type 410 due to its lower carbon content. The risk of cracking in the heat-affected zone is reduced, although preheating and post-weld heat treatment are still often recommended, especially for thicker sections.

Matching or slightly higher-alloy filler metals (E410NiMo or E410) are commonly used. For critical welded constructions, procedure qualification and controlled heat input are advised. Type 410S is the preferred martensitic grade when significant welding is involved.

Heat treatment remains an important feature of Type 410S, although the response is milder than that of higher-carbon 410.

Annealing

• Temperature: 815 – 900°C
• Cooling: Furnace cool or air cool

Hardening

• Austenitizing temperature: approximately 925 – 1010°C
• Quenching: Oil or air (depending on section size)

Tempering

• Temperature range: 200 – 700°C (selected according to required strength/hardness/toughness balance)
• Holding time: typically 1–2 hours per 25 mm of thickness, followed by air cooling

Proper control of the heat-treatment cycle is essential to achieve the desired mechanical properties while minimizing residual stresses.

SHH STEEL regularly supplies ASME SA240 410S in No.1 and 2B finishes, and can provide other finishes according to project requirements.

Dimensional tolerances for ASME SA240 410S Stainless Steel Plate conform to ASME SA240 and the general requirements of ASTM A480.

Typical available size range for SA240 410S plate:

• Thickness: 1 mm – 80 mm (thicker plates available on request)
• Width: up to 2000–3000 mm
• Length: up to 12000 mm or cut-to-length according to customer requirements

Thickness, width, length and flatness tolerances are controlled within standard limits. Tighter tolerances for SA240 410S plate can be arranged for specific project needs. SHH STEEL provides precise dimensional control for both standard and custom-size SA240 410S plates.

Related grades frequently evaluated with ASME SA240 410S include astm a240 type 410 stainless steel sheet plate, astm a240 type 430 stainless steel sheet plate, astm a240 type 304 stainless steel sheet plate, and astm a240 type 420 stainless steel sheet plate.

ASME SA240 Type 410S is widely used where moderate corrosion resistance, useful strength, and improved weldability are required. Typical applications of SA240 410S include:

SHH STEEL is a China Mill-Direct Supply and Mill Direct Exporter of stainless steel plate. We maintain long-term strategic cooperation with major Chinese stainless steel mills and supply ASME SA240 Type 410S with the following advantages:

• Competitive mill-direct pricing
• Consistent quality and complete heat traceability
• Full Mill Test Certificates (EN 10204 3.1 / 3.2 ASME)
• Flexible dimensions and surface finishes (including SA240 410S No.1 and SA240 410S 2B)
• Technical support for welding and heat-treatment guidance
• Reliable worldwide logistics and export documentation

ASME SA240 410S Stainless Steel Plate (SA240 Type 410S) is a low-carbon martensitic 12% chromium stainless steel that offers improved weldability compared with standard 410 while retaining moderate corrosion resistance and the ability to be heat treated for useful strength levels. It is the preferred martensitic grade for applications involving welding.

As a professional China Mill-Direct Supply and Mill Direct Exporter, SHH STEEL provides high-quality ASME SA240 Type 410S plate with competitive pricing, full certification and complete technical support.

Contact SHH STEEL today for stock availability, surface finish options (including SA240 410S No.1 and SA240 410S 2B), heat-treatment conditions, or a competitive quotation.

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