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AISI 316L ISO 49-1994(E) Stainless Steel Backnuts
Product Information
| Product Name | AISI 316L ISO 49-1994(E) Stainless Steel Backnuts |
| Thread Types | ISO 228-1 |
| Dimensions | ISO 49-1994(E) |
| Size Range | 1/4” to 3” |
| Pressure Class | Class 150 Class 300 |
| Materials | AISI 316/L |
Standard & Materials: AISI 316L
The AISI 316 and AISI 316L describes stainless, austenitic chromium-nickel-molybdenum steels which have good resistance in non-oxidizing acids and chlorine-containing media. Due to the chemical composition, the material 316 and the material 316L are inherently corrosion resistant metal alloys. .
AISI 316/L Approximate Average Chemical Composition (%)
| Grade | C, max | Si, max | Mn, max | P, max | S, max | Ni | Cr | Mo |
| AISI 316 | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 10.0-14.0 | 16.0-18.0 | 2.0-3.0 |
| AISI 316L | 0.03 | 1.00 | 2.00 | 0.045 | 0.030 | 10.0-14.0 | 16.0-18.0 | 2.0-3.0 |
AISI 316/L Mechanical Properties
| Mechanical Properties | 316 | 316L |
| Tensile Strength (MPa), ≥ | 515 | 485 |
| 0.2%Yield Tensile Strength (MPa) , ≥ | 205 | 170 |
| Elongation in 50mm (2 in.) (%), ≥ | 40 | 40 |
| Brinell Hardness (HBW) , ≤ | 217 | 217 |
| Rockwell Hardness (HRBW), ≤ | 95 | 95 |
ISO 49-1994(E) Dimensions of Backnuts (mm)
Backnuts may be plain or recessed, and one face may be machined.
Width across flats, s, are left to the discretion of the manufacturer.
Threads: in accordance with ISO 228-1
| Fitting Sizes (inches) | Dimensions (mm) |
| a | |
| ¼ | 6 |
| ⅜ | 7 |
| ½ | 8 |
| ¾ | 9 |
| 1 | 10 |
| 1¼ | 11 |
| 1½ | 12 |
| 2 | 13 |
| 2½ | 16 |
| 3 | 19 |
| 4 | — |
