The JIS G4305 SUS315J1 cold-rolled stainless steel plate is a premium material renowned for its exceptional chemical composition, mechanical properties, versatile heat treatment capabilities, and wide range of producible dimensions. Developed and standardized under the Japanese Industrial Standards (JIS), this grade finds numerous applications across diverse industries due to its superior performance characteristics. Here, we delve into the specifics of SUS315J1, including its chemical composition, mechanical properties, heat treatment state, dimensional range, low-temperature impact resistance, primary application scenarios, and a case study of its supply by TJC Steel Group.

Chemical Composition

The SUS315J1 cold-rolled stainless steel plate boasts a well-balanced chemical composition that contributes to its overall performance. The key elements and their permissible ranges are as follows:

· Carbon (C): 0.03% to 0.08%

· Silicon (Si): Up to 2.5%

· Manganese (Mn): Up to 2%

· Phosphorus (P): Up to 0.045%

· Sulfur (S): Up to 0.03%

· Chromium (Cr): 17% to 20.5%

· Nickel (Ni): 8.5% to 11.5%

· Copper (Cu): 0.5% to 3.5%

· Molybdenum (Mo): 0.5% to 1.5%

This precise blend of elements ensures high corrosion resistance, good formability, and enhanced mechanical properties.

Mechanical Properties

In its typical solid solution heat-treated condition, SUS315J1 exhibits exceptional mechanical properties:

· Tensile Strength (σb): ≥520 MPa

· Yield Strength (σs): ≥205 MPa

· Elongation (%): ≥40%

· Hardness (HBW): ≤187

These properties make SUS315J1 suitable for applications requiring high strength, ductility, and resistance to deformation.

Heat Treatment State

SUS315J1 is typically supplied in the solid solution heat-treated condition, which involves heating the material to a temperature above its critical point and then rapidly cooling it to obtain a homogeneous microstructure. This treatment enhances corrosion resistance and ensures consistent mechanical properties.

Producible Size Range

TJC Steel Group offers SUS315J1 cold-rolled stainless steel plates in a wide range of thicknesses, widths, and lengths to cater to various customer requirements. Typical thickness ranges from 0.3mm to 6.0mm, while widths can vary from 1000mm to 2000mm and lengths up to 6000mm, depending on the specific order.

Low-Temperature Impact Test (LTIT)

While the standard specifications for JIS G4305 SUS315J1 do not explicitly require a low-temperature impact test, TJC Steel Group conducts additional quality control measures, including LTIT, to ensure material suitability for extreme temperature applications. The test assesses the material's ability to withstand impact without fracturing at specified low temperatures, typically down to -40°C or lower.

Primary Application Scenarios

SUS315J1 cold-rolled stainless steel plates find applications across multiple sectors due to their corrosion resistance, strength, and workability:

1. Chemical Processing Industry: Used in the fabrication of tanks, pipes, and other equipment exposed to corrosive chemicals.

2. Marine Applications: Ideal for shipbuilding and offshore structures due to its resistance to seawater corrosion.

3. Food Processing: Employed in the manufacture of equipment and containers that come into direct contact with food products.

4. Architectural and Decorative Uses: Featured in exterior cladding, interior fittings, and decorative accents owing to its aesthetic appeal and durability.

TJC Steel Group Supply Case Study

TJC Steel Group, a renowned supplier of stainless steel products, has successfully supplied JIS G4305 SUS315J1 cold-rolled stainless steel plates to a leading chemical processing company. The material was specifically chosen for its ability to withstand the harsh corrosive environment of the plant, while maintaining structural integrity and meeting stringent quality standards. The order included plates of varying thicknesses and sizes, all of which were delivered on time and met the customer's exact specifications. This case study underscores TJC Steel Group's commitment to providing high-quality stainless steel solutions tailored to customers' unique needs.