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SA240 TP 304/304L sheet is an austenitic stainless steel sheet specified under ASME SA240 for chromium-nickel stainless steel plate, sheet, and strip used in pressure vessels and general applications. It provides excellent corrosion resistance, weldability, and strength, making it suitable for industries like chemical processing, food production, and construction. Gangsteel, a leading manufacturer and exporter in China, supplies SA240 TP 304/304L sheet in various forms. As a specialist in ASME SA240 stainless steel plates, Gangsteel offers customized solutions for global clients. This article explains SA240 TP 304/304L sheet, its composition, properties, and uses.
SA240 TP 304/304L sheet is a chromium-nickel austenitic stainless steel with 18–20% chromium and 8–12% nickel, providing balanced corrosion resistance and mechanical performance. TP stands for tube plate, suitable for heat exchangers. It is non-magnetic in annealed conditions and can be strengthened through cold working. Equivalent materials include UNS S30400/S30403, EN 1.4301/1.4307, and JIS SUS304/SUS304L. Gangsteel’s SA240 Gr 304 and 304L are produced under ASTM A240 stainless plate specifications, ideal for fabrication and structural purposes.
The chemical composition of SA240 TP 304/304L is defined by ASME SA240 to ensure corrosion resistance and durability. The table below lists the elements for 304 and 304L:
|
Element |
SA240 TP 304 Composition |
SA240 TP 304L Composition |
Purpose |
|---|---|---|---|
|
Carbon (C) |
≤ 0.08% |
≤ 0.03% |
Provides strength while allowing weldability (lower in 304L). |
|
Chromium (Cr) |
18.0–20.0% |
18.0–20.0% |
Offers main corrosion and oxidation resistance. |
|
Nickel (Ni) |
8.0–10.5% |
8.0–12.0% |
Improves ductility and acid resistance. |
|
Manganese (Mn) |
≤ 2.0% |
≤ 2.0% |
Enhances hot working and strength. |
|
Silicon (Si) |
≤ 0.75% |
≤ 0.75% |
Supports deoxidation and scaling resistance. |
|
Phosphorus (P) |
≤ 0.045% |
≤ 0.045% |
Restricts impurities to preserve quality. |
|
Sulfur (S) |
≤ 0.03% |
≤ 0.03% |
Reduces brittleness for better machining. |
|
Nitrogen (N) |
≤ 0.10% |
≤ 0.10% |
Increases pitting resistance and strength. |
Gangsteel follows these compositions for SA240 TP 304/304L sheet, compatible with JIS G 4304 stainless steel plate standards.
SA240 TP 304/304L sheet exhibits mechanical properties suitable for various applications. The table below summarizes these as per ASME SA240:
|
Property |
SA240 TP 304 Value |
SA240 TP 304L Value |
Description |
|---|---|---|---|
|
Tensile Strength (min) |
515 MPa (75 ksi) |
485 MPa (70 ksi) |
Highest stress before failure. |
|
Yield Strength (min) |
205 MPa (30 ksi) |
170 MPa (25 ksi) |
Stress at deformation start (0.2% offset). |
|
Elongation (min) |
40% (in 2 inches) |
40% (in 2 inches) |
Ductility measure for forming. |
|
Hardness (max) |
201 HBW (Brinell) or 92 HRB (Rockwell B) |
201 HBW (Brinell) or 92 HRB (Rockwell B) |
Resistance to deformation. |
|
Density |
7.93 g/cm³ (7930 kg/m³) |
7.93 g/cm³ (7930 kg/m³) |
Used for weight assessments. |
These attributes make SA240 TP 304/304L sheet preferable over SA240 Gr 201, with Gangsteel offering SA240 Gr 304L for weld-specific needs.
SA240 TP 304/304L has equivalents across standards for flexible use. The table below lists common ones for 304/304L:
|
Standard |
Equivalent Grade (304/304L) |
Description |
|---|---|---|
|
UNS (USA) |
S30400 / S30403 |
Universal identifier for sourcing. |
|
EN/DIN (Europe) |
1.4301 / 1.4307 |
European grade with similar attributes. |
|
JIS (Japan) |
SUS304 / SUS304L |
Japanese equivalent for regional applications. |
|
ISO |
X5CrNi18-10 / X2CrNi18-9 |
International standard for global projects. |
|
GB (China) |
0Cr18Ni9 / 00Cr19Ni10 |
Chinese grade for domestic manufacturing. |
|
BS (UK) |
304S31 / 304S11 |
British standard equivalent for UK applications. |
|
AFNOR (France) |
Z7CN18-09 / Z3CN18-10 |
French grade with matching characteristics. |
|
SS (Sweden) |
2332 / 2346 |
Swedish equivalent for Scandinavian projects. |
Gangsteel’s SA240 TP 304/304L sheet integrates with these, aligning with ASTM A 959 stainless steel plates.
SA240 TP 304/304L sheet is applied in multiple sectors due to its resistance and strength. The table below highlights uses:
|
Industry |
Application |
Related Products |
|---|---|---|
|
Chemical Processing |
Tanks, reactors, and components for corrosives. |
|
|
Food Production |
Equipment surfaces and storage. |
|
|
Construction |
Structural panels and supports. |
|
|
Automotive |
Exhaust systems and trims. |
Gangsteel’s ASME SA 213/SA 213M stainless pipes complement SA240 TP 304/304L sheet for systems.
SA240 TP 304/304L vs 316: SA240 TP 304/304L offers general corrosion resistance and is cost-effective for mild environments, while SA240 316 includes molybdenum for better chloride resistance, suited for marine or harsh chemical applications.
SA240 TP 304/304L vs 201: SA240 TP 304/304L has better corrosion resistance due to higher nickel, making it ideal for outdoor use, whereas SA240 201 is more affordable but less durable in corrosive conditions.
SA240 TP 304/304L vs 430: SA240 TP 304/304L is austenitic and non-magnetic with excellent formability, while SA240 430 is ferritic, magnetic, and offers good resistance in less demanding settings but lower overall corrosion performance.
Gangsteel’s nickel alloy steel plates provide alternatives for extreme uses.
Gangsteel, a stainless solution provider in China, offers SA240 TP 304/304L sheet with:
SA240 TP 304/304L sheet provides corrosion resistance and strength for chemical, food, and construction applications. With defined composition and properties, it meets diverse needs, supported by equivalents like EN 1.4301/1.4307.
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