| Specification: | ASTM A312 | Grade: | TP304/304L/304H/317/321/316 |
|---|---|---|---|
| Type: | Seamless | Surface: | Pickled And Annealed， Polished， Bright Annealed |
| Non Destructive Test: | Eddy Current Test -ASTM E426， Hystostatic Test-ASTM A999， Ultrsonic Test -ASTM E213 | Size Standard: | ASTM B16.10 & B16.19 & Customized |
| High Light: | Pickled Annealed Stainless Steel Pipe， S30400 Stainless Steel， Austenitic Seamless Stainless Steel Tubing | ||
Austenitic Stainless Steel ASTM A312 TP304 1.4301 Seamless Pipe
What is ASTM A312 TP304 pipe?
ASTM A312 TP 304 / 304L stainless steel pipe is the most versatile and most commonly used stainless steel on the market. And these grades are austenitic chromium alloy， also known as “18/8” stainless steel， because the composition of the steel is 18% chromium and 8% nickel.
TONG CHUANG offers ASTM A312 TP304 seamless stainless steel pipe in many years experiences.
ASTM A312 TP304 is used for various applications， which require pipe have high strength and excellent corrosion resistance in harsh environment， TP304 stainless steel is a ideal grade to balance cost and usage， its properties enable to meet the most conditions.
ASTM A312 TP304 Stainless Steel is the most used 300 series stainless steel grade， it combines of sufficient Chrome and Nickel contents to possess excellent properties， ASTM A312 TP 304 has good corrosion resistance， good formability and good weldability to meet various applications.
SS304 Equivalent Grades:
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 304 | 1.4301 | S30400 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18‐09 | X5CrNi18-10 |
Chemical Composition of TP304:
| Grade | C | Mn | P | S | Si | Ni | Cr | Fe |
|---|---|---|---|---|---|---|---|---|
| TP304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.0 | 8-11 | 18-20 | Bal. |
How to test a SS 304?
The 304 are tested to check their integrity and properties. Below are the most common tests performed on them:
1.Hydrostatic tests to check any leaks in the pipe.
2.Ultrasonic testing determines the wall thickness of a pipe. This helps determine the pressure it can bear.
3.Magnetic particle inspection is a complex test that checks any imperfections by applying iron particles.
4.The Charpy Impact test helps measure the toughness of the material.
5.In the Positive material identification test， x-ray radiation is used to check for the existance of defects in the pipe.
Mechanical Properties:
| Grade | C | Mn | P | S | Si | Ni | Cr | Fe |
|---|---|---|---|---|---|---|---|---|
| TP304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.0 | 8-11 | 18-20 | Bal. |
Physical Properties:
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
| 304/L/H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
The advantages of Stainless Steel 304 Pipe
1.The Stainless Steel 304 pipe has excellent corrosion resistance properties and also works well in different oxidative environments.
2.The 304 tubing has good hygienic performance and allows for a smooth flow of media in the system.
3. A 304 stainless steel round pipe is highly versatile and has an outstanding appearance making it a good choice for commercial establishments.
4.The 304 pipe offers excellent stability and support to different applications.
5.The tubing of the 304 grade is environmentally friendly and completely recyclable.
6.The 304 stainless tubing is very durable and can suffice for long periods.
ASTM A312 Grade TP 304 Applications:
-Sanitary
-Dairy and food processing
-Heat exchangers， evaporators
-Feedwater heaters
