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What Is ASTM A182 F304 Insert?
ASTM A182 F304 Insert is a forged stainless steel pipe fitting made from grade F304 (the forged version of 304 stainless steel), and is typically used as a socket weld fitting in high-pressure piping systems.
Definition & Description
Insert: A short-length socket weld fitting used to connect pipe ends by inserting them into the socket and welding around the outside.
Socket Weld: A type of welded joint where the pipe is inserted into a recessed area of the fitting, creating a strong, leak-proof connection ideal for high-pressure and high-temperature service.
Material: ASTM A182 F304 — forged austenitic stainless steel (similar to 304 stainless steel), offering excellent corrosion resistance, weldability, and mechanical strength.
Chemical Composition of A182 F304
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | min. max. | - 0.08 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | - 0.10 |
| 304L | min. max. | - 0.030 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 12.0 | - 0.10 |
Mechanical Properties of A182 F304
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
| 304L | 485 | 170 | 40 | 92 | 201 |
Equivalent Grades of A182 F304
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 304 | 1.4301 | S30400 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18-09 | X5CrNi18-10 |
Application of ASTM A182 F304 Insert
High-pressure steam and process lines
Oil & gas piping systems
Chemical and petrochemical plants
Food and beverage processing
Marine and offshore systems
