304 Stainless Steel Pipe
304 stainless steel pipe, 304L stainless steel pipe is a strong, tough metal with high corrosion protection, high-temperature resistance, and the ability to be sterilized. It has high workability and can be manufactured to tight tolerances and welded. These alloys are the most commonly used of stainless steel alloys and are a cost-effective choice for most applications.
SS 304L Seamless & Welded Pipes (UNS S30403) is a part of the 300 Series of steels which covers a range of austenitic chromium-nickel alloys. SS 304L Tubes have better corrosion resistance than Type 302. We also offer these pipes and tubes in customized forms with respect to their sizes and shapes.
Seamless product:
Standard: ASTM A312, ASME SA312
NPS:1/8" through 24"
Schedules:5, 10, 10S, 20, 30, 40, 40S, 80, 80S
Welded product:
Standard: ASTM A312, ASME SA312
NPS:1/8" through 12"
Schedules:5, 10, 40, 80, 160, XXH
Stainless Steel 304 / 304L Pipes & Tubes Equivalent Grades
|
Standard |
SS 304 |
SS 304L |
|
UNS |
S30400 |
S30403 |
|
Werkstoff Nr. |
1.4301 |
1.4306/1.4307 |
|
EN |
X5CrNi18-10 |
X2CrNi18-9 / X2CrNi19-11 |
|
BS |
304S31 |
304S11 |
|
GOST |
08Х18Н10 |
03Х18Н11 |
|
JIS |
SUS 304 |
SUS 304L |
|
AFNOR |
Z7CN18‐09 |
Z3CN18‐10 |
ASTM A312 / A213 Stainless Steel 304 / 304L Pipes & Tubes Useful Info
|
Element |
SS 304 |
SS 304L |
|
Ni |
8.0 – 11.0 |
8.0 – 13.0 |
|
C |
0.08 |
0.35 |
|
Mn |
2.0 max |
2.0 max |
|
P |
0.045 max |
0.045 max |
|
S |
0.03 max |
0.03 max |
|
Si |
1.0 max |
1.0 max |
|
Cr |
18.0 – 20.0 |
18.0 – 20.0 |
304 304L stainless steel has good cold and hot processing performance, can be used a variety of cold and hot processing technology for the production of forging materials, bar, wire, sheet, strip and wire and other metallurgical products, hot processing temperature range of 900-1180 ℃. Cold processing easier, no special difficulties, because the two steel is easy to cold hardening, when the cold deformation is too large, the need for intermediate annealing, in order to facilitate further processing.
1.Heat treatment process
304/304L stainless steel tube solution treatment temperature of 1080-1100 ℃, cooling water or air cooling. Cold processing intermediate annealing temperature at 850-970 ℃, after a certain period of time after the water cooling. After the solution treatment of steel structure of austenite, and sometimes there are a small amount of ferrite.
2. Welding
304/304L stainless steel tube to suppress the welding of carbide precipitation, can be used to carry out a common method of welding. Manual arc welding, carbon 0.04% -0.06% of the thin section size of the 304 stainless steel can be used Austrian 002 electrode, after welding can not produce intergranular corrosion tendencies, for thick section ruler, to maintain the resistance after intergranular corrosion resistance, After heat treatment, if not heat treatment, should be changed to 304L stainless steel or stable austenitic stainless steel.
3. Cold forming performance
304/304L stainless steel sheet in the application process, often used for cold forming operation. Its cold forming performance is a measure of whether the smooth molding and yield of the important technical indicators. The impact of 304 stainless steel cold forming factors are more complex. In terms of its metallological factors is mainly the composition of steel, that is, chromium equivalent and nickel equivalent ratio, the conventional tensile properties of the elongation is an important characterization index. In order to obtain good cold forming performance, it is necessary to control the ratio of chromium equivalent to nickel equivalent in steel to an appropriate range.
The process of welded steel pipe:
Type 304 stainless steel pipe and 304L stainless steel pipe can perform well in high temperature and harsh environments. This type of steel is extremely durable and is utilized in a wide range of applications and industries.
And it is commonly used in the following industries:
● Food processing
● Chemical Plants
● Refineries
● Paper Mills
● Kitchen Equipment
● Architectural
Contact Hunan Great Steel Pipe for help on deciding which grade and type of steel pipe are needed for your project.
