What material is S30408?
S30408 is a low-carbon austenitic stainless steel grade (equivalent to 06Cr19Ni10/304L), belonging to the 300 series of stainless steels. It is recognized by international standards such as ASTM A240/ASME SA240, GB/T 4237, and EN 1.4307. It has a density of 7.93 g/cm³, a thermal conductivity of 16.3 W/(m·K) at 100°C, and a coefficient of thermal expansion of 17.3×10⁻⁶/°C (20-100°C). It is widely used in food processing, chemical, and construction applications, where corrosion resistance, formability, and weldability are crucial.
What is S30408 equivalent to ASTM material?
S30408 is equivalent to the ASTM and AISI designation 304 stainless steel (UNS S30400) in terms of composition and properties. While S30408 is a Chinese standard (GB/T 20878), it describes the same 18/8 austenitic stainless steel as the widely recognized 304, which is standardized under ASTM A240 and AISI standards.
S30408 Stainless Steel Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Nickel (Ni) | 8.00 – 11.00 |
| Chromium (Cr) | 18.00 – 20.00 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
S30408 Stainless Steel Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 515 |
| Yield Strength 0.2% Offset (MPa) | ≥ 205 |
| Elongation (%) | ≥ 40 |
| Hardness (Brinell HBW) | ≤ 201 |
| Hardness (Rockwell B) | ≤ 92 |
| Hardness (Vickers HV) | ≤ 210 |
S30408 Stainless Steel Physical Properties
| Property | Value |
|---|---|
| Density | 7.93 g/cm³ |
| Melting Range | 1398 – 1454 °C |
| Thermal Conductivity (100 °C) | 16.2 W/m·K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity | 0.72 μΩ·m (at 20 °C) |
| Modulus of Elasticity | 193 GPa |
| Poisson's Ratio | 0.29 |
Is S30408 material magnetic?
No, S30408 (304 stainless steel) is not inherently magnetic, as it is an austenitic stainless steel with a non-magnetic crystal structure. However, it can become magnetic under specific conditions, primarily through processes like cold working or welding, which can transform some of the austenite into a magnetic martensite or ferrite phase
Machinability of S30408 stainless steel
S30408 stainless steel (the same as 304) is known for its poor machinability due to rapid work hardening, requiring slow machining speeds, controlled feeds, and sharp tools to control chip formation and prevent overheating. Compared to easy-to-machine alloys like 303 stainless steel, it is less suitable for high-volume, complex part machining.
Applications: Due to its properties, S30408 is used in a broad range of applications, including:
Kitchenware and sinks
Food processing equipment
Automotive parts and exhaust systems
Heat exchangers
Architectural trim and molding
Structural components in buildings and bridges
What is the difference between S30408 and 304 Stainless Steel?
The main distinction is the standard they follow. S30408 aligns with Chinese standards, while 304 stainless steel adheres to international standards like ASTM A240/AISI. Essentially, they represent the same material with equivalent properties.
who choose us?
If you have a project need for S30408 stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. We process these products into a variety of practical product forms, including sheet, coil, tube, bar, and wire. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.Mail:es@gescosteel.com