Material Characteristics

Chemical Composition: Mainly includes Chromium (Cr) content of 24.00% to 26.00%, Nickel (Ni) content of 19.00% to 22.00%, and Carbon (C) content ≤0.08%. Higher Chromium and Nickel contents confer excellent oxidation and corrosion resistance, while the low carbon content enhances heat resistance.

Mechanical Properties: High strength and hardness with tensile strength ≥515MPa, yield strength ≥205MPa, elongation ≥35%, hardness ≤310HB, capable of withstanding heavy loads and forming during the processing.

Specification and size

Standard Specifications: The commonly available 310S seamless square tubes on the market come in a wide range of sizes, with side lengths typically ranging from 10mm×20mm to 300mm×600mm, wall thickness from 0.5mm to 20mm, and lengths usually in 6m or 12m, with custom sizes available upon customer request.

Manufacturing process

Production Process: Generally manufactured using cold rolling or hot rolling techniques. The process involves steps such as raw material preparation, melting and casting, hot rolling or cold drawing shaping, heat treatment, pickling and passivation, inspection and testing, to ensure the smoothness of the inner and outer walls of the pipes, free from defects like sand holes and cracks, and precise dimensions.

Standard of Implementation

Related Standards: Commonly enforced standards include ASTM A312, ASTM A790, SA213, SA249, SA789, GB/T14976, etc.

Application Fields

Chemical Industry: Used for manufacturing reactors, pipelines, etc., capable of resisting erosion from various corrosive media.

Heat Treatment Equipment: Such as heating furnaces, heat exchangers, etc., capable of stable operation under high-temperature conditions.

Building Decoration: Suitable for architectural decoration, such as stainless steel railings and handrails, both aesthetic and durable.

Automotive Manufacturing: Particularly for racing car exhaust systems, materials that can withstand high temperatures and pressures are required. 310S seamless square tubes are one ideal choice.

Environmental Protection Equipment: Such as flue pipes for incinerators and pipelines for treating high-temperature corrosive gases, 310S seamless square rectangular tubes are also used.

III. Technical Requirements

Material: 310S Stainless Steel, chemical composition must meet relevant standards, such as Chromium (Cr) content between 24.00% and 26.00%, Nickel (Ni) content between 19.00% and 22.00%, Carbon (C) content ≤ 0.08% and so on.

Compliance Standards: Meets one or more of the following standards: ASTM A312, ASTM A790, GB/T14976, etc.

Mechanical properties: Tensile strength ≥515MPa, Yield strength ≥205MPa, Elongation ≥35%, Hardness ≤310HB.

Surface Quality: The inner and outer walls of the pipe should be smooth with no sand holes, cracks, folds, or oxidation scales. The surface can be treated with acid pickling and passivation as required to achieve a certain degree of brightness.

Dimensional Tolerance: Edge length tolerance within ±0.5mm, wall thickness tolerance within ±0.05mm, length tolerance within ±5mm.

Section 4: After-Sales Service

Suppliers must provide a product manual, ensuring that the products supplied are brand new and unused, and are qualified. Under normal usage conditions, the warranty period is [X] years.

After-sales Service: In case of quality issues with the product during use, the supplier shall respond within [X] hours upon receiving notification and send personnel to the site for handling within [X] working days.

V. Packaging Requirements

6. Pricing and Payment Terms

Unit Price: [Price per piece or per ton] Yuan

Total Amount: [Total Amount] Yuan

Payment Terms: [e.g., 30% deposit in advance, with the remaining 70% due upon receipt and acceptance of the goods]

Section 7: Other Terms

Default Liability: If the supplier fails to deliver on time or the product quality does not meet the requirements, they shall assume the corresponding default liability, such as paying liquidated damages and compensating for losses.

Dispute Resolution: In case of disputes arising during the procurement process, the parties should resolve them amicably; if unable to reach an agreement, either party may file a lawsuit with the people's court having jurisdiction at the contract signing location.