Wuxi Zhongxin Special Steel Co.，Ltd
High Quality. High Performance. Competitive Price.
Add to Cart
product introduction
Grade 304 is the most commonly used stainless steel. It is an austenitic, corrosion-resistant steel with excellent strength, toughness, fabrication characteristics and weldability. The low carbon version, 304L, may be required for full corrosion resistance when thicker sections are welded. The 304H version has a guaranteed minimum carbon content, which ensures good strength at high temperatures.
Grade 304 stainless steel contains 18% chromium, which makes it resistant to many corrosive environments. It is austenitic in structure because of the 8% nickel it contains. The very tough and ductile austenitic structure gives grade 304 excellent formability and fabrication characteristics.
In most applications, 304 stainless steel is used where its corrosion resistance gives long-lasting appearance and service life. The ease of cleaning and of maintaining a hygienic surface on the steel make it excellent for many purposes.
The low carbon version, 304L stainless steel, may be required for full corrosion resistance when sections thicker than about 6mm are welded. The version with guaranteed high carbon, 304H stainless steel, may be required for elevated temperature service, such as pressure vessels.
standards for 20 # seamless steel pipes
(1) ASTM A276
(2) ASTM A240
(3) JIS G4305
(4) JIS G4303
304 Stainless Steel chemical composition
(AS1449 / ASTM A240 – Flat Products)
| Carbon | Silicon | Manganese | Phosphorus | Sulphur | Nickel | Chromium | Nitrogen | ||
| 304 | Specification (max)
| 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 8.00 – 10.50 | 18.00 – 20.00 | 0.10 |
| (typical) | 0.045 | 0.49 | 1.22 | 0.028 | 0.005 | 8.3 | 18.2 | 0.045 | |
| 304L | Specification (max) | 0.03 | 0.75 | 2.00 | 0.045 | 0.030 | 8.00 – 12.00 | 18.00 – 20.00 | 0.10 |
| (typical) | 0.020 | 0.42 | 1.46 | 0.028 | 0.005 | 9.1 | 18.3 | 0.048 | |
| 304H | Specification (max) | 0.04 – 0.10 | 0.75 | 2.00 | 0.045 | 0.030 | 8.00 – 10.50 | 18.00 – 20.00 | – |
| (typical) | 0.049 | 0.49 | 1.25 | 0.028 | 0.005 | 8.3 | 18.3 | 0.043 |
mechanical properties (mechanical properties)
(AS1449 / ASTM A240 – Flat Products)
| Thickness | 0.2% Proof Stress | Tensile Strength | Elongation | Hardness | ||
| Unit | MPa | MPa | % | HB (max) | ||
| 304 | Specification (min) | 205 | 520 | 40 | 202 | |
| typical values | 0.3 – 3.5mm | 260 | 660 | 55 | 160 | |
| 3.6 – 6mm | 250 | 600 | 55 | 160 | ||
| > 6mm | 240 | 580 | 55 | 155 | ||
| 304L | Specification (min) | 170 | 485 | 40 | 183 | |
| 304H | Specification (min) | 205 | 520 | 40 | 202 | |
Q & A
Q1: How can we get the sample?
A1: Free samples are available for your checking and testing.But you need to pay for the frieght cost.
Q2: Can you provide Mill Test Certificate?
A2: Yes! The Mill Test Certificate will be issued with the product.
Q3:Packing details?
A3:Packaged 25 Tons per 20 GP wooden case container.
20ft GP: 5898mm(Length)x2352mm(Width)x2393mm(High)
40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)
40ft HC: 12032mm(Lengh)x2352mm(Width)x2698mm(High)
Q4:What is your terms of payment?
A4: 100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.
Q5:Can we visit your factory?
A5: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case