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Astm A213 SS304 Stainless Steel Seamless Tubes
We are one of the biggest manufactures of stainless steel & duplex steel & alloy steel tubes and pipes in China. With development more than 20 years, we have accumulated a great many clients all around the world and Yuhong products also won the great praise among the customers.
What is the meaning of SS 304?
Type 304 stainless steel is a T 300 Series Stainless Steel austenitic. It has a minimum of 18% chromium and 8% nickel, combined with a maximum of 0.08% carbon. It is defined as a Chromium-Nickel austenitic alloy. Grade 304 is the standard "18/8" stainless that you will probably see in your pans and cookery tools.
What is difference between ss316 and ss304?
A major difference between 304 and 316 stainless steel is the chemical composition, with 316 containing a significant amount of molybdenum; typically 2 to 3 percent by weight vs only trace amounts found in 304. The higher molybdenum content results in grade 316 possessing increased corrosion resistance.
Is 304 stainless steel good quality?
Both steels are durable and provide excellent resistance to corrosion and rust. 304 stainless steel is the most versatile and widely used austenitic stainless steel in the world, due to its corrosion resistance.
How can you tell if stainless steel is 304?
If you want to do spot check of SS, just take a random piece from the raw material and do a spark test. Run a grinder on it, if the sparks are reddish orange, thin and don't fly much it's SS304. If the sparks are yellow, thick and fly lot further it is SS 202.
A312 TP304 Chemical Composition
| SS GRADE | 304 | 304N | 304LN |
| Ni | 8 – 11 | 8 – 11 | 8 – 11 |
| Fe | Balance | ||
| Cr | 18 – 20 | 18 – 20 | 18 – 20 |
| C | 0.08 max | 0.08 max | 0.035 max |
| Si | 0.75 max | 0.75 max | 0.75 max |
| Mn | 2 max | 2 max | 2 max |
| P | 0.040 max | 0.040 max | 0.040 max |
| S | 0.030 max | 0.030 max | 0.030 max |
| N | 0.10 – 0.16 | 0.10 – 0.16 | |
A312 TP304 Mechanical Properties
| Stainless Steel Gr. | 304 |
| Rockwell B (HR B) maximum | 92 |
| Brinell (HB) maximum | 201 |
| Tensile Strength minimum (MPa) | 515 |
| Yield Strength 0.2% Proof minimum (MPa) | 205 |
| Elongation minimum (% in 50mm) | 40 |
| Hardness | - |
SA 312 TP 304 Equivalent
| GRADE | UNDER | ASTM A312 TP 304 |
| UNS | USA | S30400 |
| EN | EUROPE | X5CrNi18-10 |
| JIS | JAPAN | SUS 304 |
| AFNOR | RUSSIAN | Z7CN18‐09 |
| BS | BRITISH | 304S31 |
| WERKSTOFF NR. | GERMAN | 1.4301 |
| GOST | RUSSIAN | 08Х18Н10 |
| SS | SWEDISH | 2332 |
Applications for 304 Stainless Steel
