Softened - Descaled Hot Rolled Stainless Steel Plate ASTM A240 310S
ASTM A240 Type 310Sis a high-performance austenitic stainless steel plate, processed via professional hot rolling, high-temperature softening (solution annealing) and precision descaling treatment. Compliant with ASTM A240/ASME SA240 industrial standards, this grade features ultra-low carbon content compared with standard 310 stainless steel, effectively preventing carbide precipitation and intergranular corrosion during high-temperature operation and welding. The softened heat treatment optimizes internal grain structure, delivering excellent ductility and processability, while the full descaling process removes surface oxide scales completely, ensuring a smooth, clean surface and stable anti-corrosion performance. With outstanding high-temperature oxidation resistance, thermal stability and sulfurization resistance310S stainless steel plateis the preferred material for extremehigh-temperature industrial environmentsworldwide.
Item | Specification Details |
|---|---|
Product Standard | ASTM A240 / ASME SA240, UNS S31008 |
Processing Condition | Hot Rolled, Softened (Solution Annealed), Fully Descaled |
Thickness Range | 4mm - 100mm (custom thickness available) |
Width Range | 1000mm - 2000mm (custom width available) |
Length Range | 2000mm - 6000mm (custom length available) |
Surface Finish | Clean descaled surface, no oxide scale, no rust, uniform texture |
Tolerance | Strict ASTM A240 standard dimensional tolerance |
Technical Data
1.Chemical Composition
Element | Content Standard | Function Description |
|---|---|---|
Carbon (C) | ≤ 0.08% | Low carbon design prevents carbide precipitation and intergranular corrosion at high temperature |
Chromium (Cr) | 24.00-26.00 percent | Provides excellent high-temperature oxidation and corrosion resistance |
Nickel (Ni) | 19.00-22.00 percent | Stabilizes austenitic structure, improves thermal stability and toughness |
Manganese (Mn) | ≤ 2.00% | Optimizes processing performance and structural uniformity |
Silicon (Si) | ≤ 1.50% | Enhances high-temperature oxidation resistance |
Phosphorus (P) | ≤ 0.045% | Strict control to avoid brittleness |
Sulfur (S) | ≤ 0.030% | Reduces impurity and improves material stability |
2.Mechanical Properties
|
|
|---|---|
Mechanical Index | Test Standard Value |
Tensile Strength | ≥ 515 MPa |
Yield Strength (0.2% Offset) | ≥ 205 MPa |
Elongation | ≥ 40% |
Hardness (HB) | ≤ 215 HB |
High-Temperature Resistant Limit | Continuous service up to 1100°C |
Application Fields
ASTM A240 310S hot rolled softened & descaled stainless steel plate is widely applied in various high-temperature and harsh industrial scenarios:
·High-Temperature Furnace Industry: Furnace liners, furnace doors, heat treatment furnace components, industrial kiln accessories, continuous furnace conveyor parts, high-temperature heating equipment shells.
·Petrochemical & Chemical Industry: High-temperature reaction vessels, sulfurization-resistant equipment, chemical furnace tubes, heat exchangers, high-pressure corrosion-resistant pipelines and container plates.
·Power Generation Industry: Boiler heat exchange components, power plant flue gas treatment equipment, high-temperature pipeline accessories, thermal power furnace parts, waste heat recovery equipment.
·Aerospace & Metallurgy: High-temperature structural parts for aerospace equipment, metallurgical furnace components, high-temperature sintering equipment, thermal insulation and heat-resistant structural plates.
·Environmental Protection & Incineration Industry: Municipal waste incinerator liners, flue desulfurization and denitrification equipment, high-temperature exhaust gas treatment devices, corrosion-resistant and heat-resistant lining plates.
·Other Industrial Fields: High-temperature baking equipment, food processing high-temperature devices, pharmaceutical high-temperature sterilization equipment, special high-temperature resistant mechanical parts.
FAQ
Q1: What is the difference between 310S and ordinary 310 stainless steel?
310S is an upgraded low-carbon version of 310 stainless steel. Its carbon content is strictly controlled below 0.08%, which effectively inhibits chromium carbide precipitation under long-term high-temperature conditions. It avoids intergranular corrosion and welding decay, delivering better high-temperature stability and longer service life, making it more suitable for continuous high-temperature working environments than standard 310 steel.
Q2: What are the benefits of softened & descaled treatment?
The softened solution annealing treatment eliminates internal residual stress generated by hot rolling, optimizes grain structure, and significantly improves the plate's ductility, bending performance and weldability, reducing processing cracking risk. The full descaling process completely removes surface oxide layers and impurities, ensuring a flat and clean surface, improving subsequent processing effects such as cutting, welding and painting, and enhancing overall corrosion resistance and aesthetics.
Q3: What is the maximum working temperature of 310S stainless steel plate?
This hot rolled 310S plate can withstand continuous high temperature up to 1100°C under normal cyclic heating conditions, and maintains stable oxidation resistance and mechanical properties. It can adapt to intermittent high-temperature working conditions above 1100°C, which is far superior to 304, 316L and other conventional stainless steel grades in high-temperature resistance.
Q4: Is customized size and surface treatment available?
Yes. We support customized thickness, width, length and cutting processing according to customer drawings. Besides standard softened & descaled finish, we can also provide polishing, pickling, sandblasting and other surface treatments to meet different application and processing requirements.
Q5: What certifications and test reports can be provided?
All products fully comply with ASTM A240 standard. We can provide factory material test reports (MTR), chemical composition analysis reports, mechanical performance test certificates, and third-party inspection reports (SGS, BV, etc.) to support customer quality verification and project acceptance.
Q6: What is the delivery cycle and packaging standard?
Conventional sizes are in stock with fast delivery. Customized sizes take 3-7 working days. Standard export packaging adopts waterproof paper + plastic film + wooden pallet/steel frame packing to prevent rust, deformation and damage during long-distance sea and land transportation, meeting international export packaging standards.
Q7: Can 310S stainless steel plate be welded and processed?
Absolutely. After softened annealing treatment, the plate has excellent processability. It supports conventional welding methods such as argon arc welding and electric welding with stable welding effect and no post-weld corrosion failure. It can also be freely cut, bent, punched and machined for secondary molding.
