ASTM A403 WP316L-S Stainless Steel Cap Butt Weld Fitting ANSI B16.9
A403 / SA403 WP316L-S CAP SS BW FITTNG ANSI B16.9
What is a stainless steel cap?
A stainless steel cap is typically a protective cover or end piece made of stainless steel that is used to fit over the end of a pipe, tube, or other cylindrical object. It is often used to seal off the end of the object to protect it from damage, corrosion, or contamination. Stainless steel caps are commonly used in plumbing, construction, and industrial applications for their durable and corrosion-resistant properties.
What is grade SS316L/UNS S31603?
SS316L is a low-carbon variation of SS316 stainless steel, which contains molybdenum. The "L" stands for "low carbon," meaning it has a lower carbon content than standard SS316. This lower carbon content helps to prevent sensitization, which is the formation of chromium carbide at grain boundaries when the alloy is exposed to high temperatures. Sensitization can reduce the corrosion resistance of stainless steel.
SS316L/UNS S31603 is known for its excellent corrosion resistance, especially in corrosive environments such as marine applications or chemical processing. It is commonly used in industries where corrosion resistance is essential.
SS316L Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength | Elongation |
| 8.0 g/cm3 | 1040 °C (1900 °F) | ksi – 75, MPa – 515 | ksi – 30 , MPa – 205 | 35 % |
SS316L Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni |
| SS 316L | 0.030 max | 2.00 max | 1.00 max | 0.045 max | 0.030 max | 16.00 - 18.00 max | 2.00 – 3.00 max | 10.00 – 14.00 max |
SS316L Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN |
| SS316L | 1.4404 | S31603 | SUS 316L | 03Ch17N14M3 | X2CRNIMO17-12-2 |
WP316L Fittings Application:
Chemical Processing
Food and Beverage
Pharmaceuticals
Petrochemical
Water Treatment
Marine Applications
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.