What is equivalent to UNS S30400?
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If you're sourcing stainless steel for engineering or industrial use, you may come across the grade UNS S30400. But what does it mean-and what are its equivalents across international standards?
In this article, we'll explain what UNS S30400 stands for, its equivalent grades in different systems (EN, DIN, AISI, JIS), its chemical composition, and why it's one of the most commonly used stainless steels globally.
Keywords Covered: UNS S30400 equivalent, what is equivalent to UNS S30400, S30400 vs 304, stainless steel 1.4301 vs S30400, SUS304 vs S30400, AISI 304 equivalent
What material is the uns S30400?
UNS S30400 is the Unified Numbering System (UNS) designation for 304 stainless steel, one of the most widely used austenitic stainless steels. It contains approximately 18% chromium and 8% nickel, and has excellent corrosion resistance, good formability, and weldability. It is commonly used in building structures, food processing equipment, kitchen appliances, chemical containers, heat exchangers.
What is the ASTM equivalent of uns S30400 material?
| Standard System | Equivalent Grade |
|---|---|
| AISI / SAE (USA) | 304 |
| EN / DIN (Europe) | 1.4301 |
| ISO | X5CrNi18-10 |
| GB (China) | 06Cr19Ni10 / 0Cr18Ni9 |
| JIS (Japan) | SUS304 |
| BS (UK) | 304S15 / 304S31 |
| ASTM | ASTM A240 / ASTM A276 Type 304 |
uns S30400 Chemical Composition (Typical)
| Element | Content (%) |
|---|---|
| Cr | 18.0 – 20.0 |
| Ni | 8.0 – 10.5 |
| C | ≤ 0.08 |
| Mn | ≤ 2.0 |
| Si | ≤ 1.0 |
| P | ≤ 0.045 |
| S | ≤ 0.03 |
| Fe | Balance |
AISI 304 Mechanical Properties
| rade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50 mm) min | Hardness | |
|---|---|---|---|---|---|
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
What does uns S30400 mean on a bolt?
S30400 is the UNS (Unified Numbering System) designation for 304 stainless steel, a commonly used austenitic stainless steel known for its corrosion resistance and strength. When marked on a bolt, "S30400" indicates that the bolt is made from 304 stainless steel, suitable for general-purpose applications in construction, marine, food processing, and industrial equipment where resistance to rust and chemical exposure is essential.
What is the difference between 18-8 and S30400?
"18-8" is a general trade term describing stainless steels with approximately 18% chromium and 8% nickel, which includes a range of grades like 304 (S30400). In contrast, S30400 is a specific material designation under the UNS system, precisely identifying 304 stainless steel. So while all S30400 stainless steel is 18-8, not all 18-8 grades are necessarily certified as S30400-they may have slight variations in composition or be used for different specifications.
What is the rate of SS304 per kg?
The price of SS304 stainless steel per kilogram varies depending on factors like global nickel prices, sheet or bar form, surface finish (2B, BA, mirror, etc.), and quantity ordered. As of current market trends, the typical range is $2.5–$4.5 USD per kg, but this can fluctuate based on raw material costs and processing requirements. For bulk orders or customized products, it's best to request a quote from a supplier like GNEE for accurate pricing.
GNEE: Reliable Supplier of UNS S30400 Equivalent Stainless Steel
GNEE supplies a wide range of stainless steel products equivalent to UNS S30400, including:
304 stainless steel pipe and tube
304 stainless steel plates and sheets
304 stainless steel round bars and flat bars
304 stainless steel C channels and structural profiles
Customized cutting, polishing, and fabrication
All materials meet ASTM A240, A276, EN 1.4301, and JIS SUS304 standards and come with full EN 10204 3.1 certificates. We offer fast global delivery, competitive pricing, and OEM customization for engineering, architectural, and industrial applications.
