Stainless Steel DIN 1.4307 seamless Pipes
Grade 1.4307 stainless steel is one of the most widely used stainless steel grades. This grade is very close to grade 304 stainless steel, also shown as 1.4307 or X2CrNi18-9 according to EN standards. According to the UNS specification, it is also called UNS S30403. The name 1.4307 can be interpreted as 304 and L separated. L represents Low, and low represents the low carbon content of the material, so 1.4307 represents the low carbon content of 304 grade stainless steel, and the other properties are almost the same as 304 grade stainless steel. Due to the lower carbon content, 1.4307 SS Seamless Pipe has slightly better weldability than grade 304.
The carbon content of 1.4307 SS Round Pipe is less than 0.03%, the lower carbon content makes this grade more elastic, so if better elasticity and better weldability are needed, 1.4307 Stainless Steel Round Pipe will be better than 304 Brand is a better choice.
DIN 1.4307 Pipes Chemical Composition
| Grade | DIN 1.4307 | |
|---|---|---|
| min | max | |
| C | – | 0.03 |
| Mn | – | 2.0 |
| Si | – | 1.0 |
| P | – | 0.045 |
| S | – | 0.030 |
| Cr | 18.0 | 20.0 |
| Mo | – | – |
| Ni | 8.0 | 12.0 |
| N | – | – |
DIN 1.4307 SS Pipes Mechanical Properties
| Grade | DIN 1.4307 | |
|---|---|---|
| Tensile Strength (MPa) min | 485 | |
| Yield Strength 0.2% Proof (MPa) min | 170 | |
| Elongation (% in 50mm) min | 40 | |
| Hardness | Rockwell B (HR B) max | 92 |
| Rockwell B (HR B) max | 201 | |
DIN 1.4307 Stainless Steel Fabricated Pipes
1.4307 Stainless Steel Seamless Pipe mechanical properties: ⑴ Delivery status: "Bar cutting and solution treatment, hot pressure processing without solution treatment", plate solution pickling, ⑵ Tensile strength (RM/MPa): 480, ⑶ Tensile strength (Rp0.2/MPa): 177, ⑷ Elongation A/%: 40, ⑸ Reduction of area (Z/%): 60.
1.4307 SS Hollow Pipe heat treatment: ① Hardness HBW≤: solid solution 187, hardness HRB≤: 90, ② Heating temperature: 1010~1150, ③ Heating method: rapid cooling, ④ Others: Cold rolled plate solid solution 485, 201HBW 92HRB 210HV.
1.4307 Application fields: Mainly used in equipment, containers, pipes and various parts that need to be welded but cannot be solution treated in chemical, petrochemical, fertilizer, petroleum, power and other industries.
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