ASTM A240 Type 304N Stainless Steel Sheet & Plate
What is ASTM A240 Type 304N Stainless Steel Sheet?
As a production and export expert at SHH STEEL, we are pleased to present our ASTM A240 Type 304N Stainless Steel Sheet and Plate, also known as SS304N or UNS S30451, ASTM A240 304N, ASTM A240 Type 304N, ASTM A240 304N stainless steel plate, ASTM A240 304N sheet, 304N stainless steel plate, 304N stainless steel sheet, SS304N, UNS S30451, 06Cr19Ni10N, 1.4315, SUS304N
This nitrogen-strengthened version of Type 304 is produced under ASTM A240 / ASME SA240 specification. The controlled addition of nitrogen (0.10–0.16%) significantly increases yield and tensile strength while maintaining good ductility, toughness, and corrosion resistance.
ASTM A240 Type 304N is widely used in applications requiring higher mechanical strength than standard 304 without moving to more expensive alloy grades. SHH STEEL supplies ASTM A240 304N stainless steel plate and ASTM A240 304N sheet in thicknesses from 0.5 mm to 100 mm, with widths up to 2500 mm and lengths up to 12000 mm. Custom sizes and various surface finishes are available.
Our material is typically supplied in the annealed condition with full Mill Test Certificates (EN 10204 3.1). Whether you need thin 304N stainless steel sheet for fabrication or thicker 304N stainless steel plate for structural or pressure applications, SHH STEEL provides consistent quality and reliable global supply.
Material Specification of ASTM A240 Type 304N
ASTM A240 Type 304N stainless steel sheet and plate are manufactured in accordance with ASTM A240/A240M and ASME SA240. This specification covers chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and general applications. SHH STEEL offers material in annealed condition with common finishes such as 2B, No.1, BA, and HL.
| Specification Element | Requirement | SHH STEEL Compliance | Keywords |
|---|---|---|---|
| Primary Standard | ASTM A240 / ASME SA240 Type 304N | Full compliance | ASTM A240 304N specification |
| Product Form | Sheet & Plate | Both available | ASTM A240 304N sheet plate |
| Thickness Range | 0.5–100 mm | Custom sizes available | ASTM A240 304N dimensions |
| Width / Length | Up to 2500 mm / 12000 mm | Custom fabrication | ASTM A240 304N size options |
| Surface Finish | 2B, No.1, BA, HL | Multiple options | ASTM A240 304N finish |
| Heat Treatment | Annealed | Standard supply condition | ASTM A240 304N annealed |
ASTM A240 Type 304N Chemical Composition
The chemical composition of ASTM A240 Type 304N is designed with intentional nitrogen addition to increase strength.
| Element | Content (%) | Standard Limit | Role | Keywords |
|---|---|---|---|---|
| Carbon (C) | ≤0.08 | 0.08 max | Strength and corrosion balance | ASTM A240 304N carbon |
| Manganese (Mn) | ≤2.00 | 2.00 max | Deoxidation and strength | ASTM A240 304N manganese |
| Phosphorus (P) | ≤0.045 | 0.045 max | Impurity control | ASTM A240 304N phosphorus |
| Sulfur (S) | ≤0.030 | 0.030 max | Cleanliness | ASTM A240 304N sulfur |
| Silicon (Si) | ≤0.75 | 0.75 max | Deoxidation | ASTM A240 304N silicon |
| Chromium (Cr) | 18.00–20.00 | 18.00–20.00 | Corrosion resistance | ASTM A240 304N chromium |
| Nickel (Ni) | 8.00–10.50 | 8.00–10.50 | Austenite stability | ASTM A240 304N nickel |
| Nitrogen (N) | 0.10–0.16 | 0.10–0.16 | Strengthening element | ASTM A240 304N nitrogen |
ASTM A240 Type 304N Mechanical Properties
ASTM A240 Type 304N offers higher strength than standard Type 304 due to nitrogen strengthening.
| Property | Value | Test Method | Keywords |
|---|---|---|---|
| Tensile Strength | ≥550 MPa (80 ksi) | ASTM A370 | ASTM A240 304N tensile |
| Yield Strength (0.2% Offset) | ≥240 MPa (35 ksi) | ASTM A370 | ASTM A240 304N yield |
| Elongation | ≥30% | ASTM A370 | ASTM A240 304N elongation |
| Hardness | ≤217 HB | ASTM E10 | ASTM A240 304N hardness |
| Density | 8.00 g/cm³ | Standard | ASTM A240 304N density |
Delivery Conditions
SHH STEEL supplies ASTM A240 Type 304N stainless steel sheet and plate primarily in the annealed condition. Common surface finishes include 2B, No.1, BA, and HL. Protective film is available upon request.
| Condition | Description | Keywords |
|---|---|---|
| Annealed | Standard supply condition | ASTM A240 304N annealed |
| Surface Finish | 2B, No.1, BA, HL | ASTM A240 304N surface |
Tolerances
Dimensional tolerances comply with ASTM A480. Tighter tolerances can be arranged for precision applications.
Equivalent Material Grade
ASTM A240 Type 304N has multiple international and national equivalents. Below is an expanded comparison including Chinese national standards (GB):
| Grade | Standard | Designation | Keywords |
|---|---|---|---|
| Type 304N | ASTM A240 / ASME SA240 | — | ASTM A240 304N equivalent |
| UNS S30451 | Unified Numbering System | S30451 | ASTM A240 304N UNS |
| 1.4315 | EN 10088 / EN 10028-7 | X5CrNiN19-9 | ASTM A240 304N EN |
| SUS304N1 / SUS304N2 | JIS G4304 / G4305 | — | ASTM A240 304N JIS |
| 06Cr19Ni10N | GB/T 20878 / GB/T 4237 / GB/T 3280 | S30458 | China GB 06Cr19Ni10N |
| 0Cr19Ni9N | old China GB | — | old China GB 0Cr19Ni9N |
| X5CrNiN19-9 | DIN / EN | — | ASTM A240 304N DIN |
| 304S65 | BS | — | ASTM A240 304N BS |
Note:
- Chinese standards commonly use 06Cr19Ni10N (new designation) and previously 0Cr19Ni9N.
- It is also referenced under GB/T 24511 (pressure equipment stainless steel plate) and other related Chinese standards for plate, sheet, and strip.
Supplementary Requirements
Additional testing available includes intergranular corrosion testing, ultrasonic examination, product analysis, and elevated temperature mechanical testing upon request.
Applications
Due to its higher strength and good corrosion resistance, ASTM A240 Type 304N stainless steel sheet and plate are used in:
| Application | Typical Use | Keywords |
|---|---|---|
| Pressure Vessels | Higher-strength vessels and tanks | ASTM A240 304N vessel |
| Chemical Equipment | Process equipment requiring higher strength | ASTM A240 304N chemical |
| Structural Components | Load-bearing stainless structures | ASTM A240 304N structural |
| Food & Beverage | Equipment needing higher mechanical properties | ASTM A240 304N food |
| Nuclear & Industrial | Components requiring nitrogen-strengthened austenitic steel | ASTM A240 304N industrial |
Why Choose SHH STEEL
SHH STEEL is a professional supplier of ASTM A240 Type 304N stainless steel sheet and plate. We offer competitive pricing, flexible custom sizes, multiple surface finishes, and reliable worldwide delivery. All material is supplied with full Mill Test Certificates.
Advantage | Benefit | Keywords —|—|—|— Full Certification | ASTM A240 / ASME SA240 + MTC 3.1 | ASTM A240 304N certified Flexible Supply | Sheet & Plate, custom sizes | ASTM A240 304N custom Global Experience | Export to 50+ countries | ASTM A240 304N trusted supplier
FAQ
- What is the main difference between ASTM A240 304 and 304N?Type 304N contains intentional nitrogen (0.10–0.16%) which significantly increases yield and tensile strength compared with standard Type 304, while maintaining good corrosion resistance and formability.
- What is the Chinese equivalent of ASTM A240 Type 304N?The main Chinese national standard (GB) equivalents are 06Cr19Ni10N (S30458) and the older designation 0Cr19Ni9N.
- Is ASTM A240 304N the same as SUS304N1?Yes, SUS304N1 (and SUS304N2 in some cases) are the Japanese equivalents of ASTM A240 Type 304N / UNS S30451.
- What is the density of ASTM A240 Type 304N?The density is 8.00 g/cm³.
Conclusion
SHH STEEL’s ASTM A240 Type 304N Stainless Steel Sheet and Plate provide higher strength through nitrogen alloying while retaining the excellent corrosion resistance and fabricability of the 304 family. With strict quality control, flexible sizing, expanded equivalent grade support (including Chinese GB standards), and professional global export service, we deliver reliable solutions to customers worldwide.
Contact SHH STEEL today for your ASTM A240 304N requirements.
Keywords Of ASTM A240 Type 304N Stainless Steel Sheet & Plate
ASTM A240 304N, ASTM A240 Type 304N, ASTM A240 304N stainless steel plate, ASTM A240 304N sheet, 304N stainless steel plate, 304N stainless steel sheet, SS304N, UNS S30451, 06Cr19Ni10N, 1.4315, SUS304N1
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