Stainless Steel · Fittings · ASTM A403 WP316L
SS 316L Stainless Steel Fittings
In short: SS 316L fittings: butt-weld to ASTM A403 WP316L and forged to A182 F316L, the standard match for SS 316L pipe in chemical, pharmaceutical and offshore utility piping.
- S31603
- UNS number
- 8
- density, g/cm³
- 3.1 / 3.2
- EN 10204 certificates
- 7
- SS 316L product forms
Why this combination
Why SS 316L in fittings
Fittings complete a low-carbon welded system. WP316L elbows, tees, reducers and caps keep every joint as sound as the pipe.
Specify WP-S or WP-W per your piping class, and the schedule to match the pipe.
Specification
How to specify SS 316L fittings
Butt-weld ½" – 48" (larger fabricated to order) in schedules matching the pipe; socket-weld and threaded ⅛" – 4" in Class 2000, 3000, 6000 and 9000
- Specification
- ASTM A403 WP316L (butt-weld); A182 F316L (forged)
- UNS
- S31603
- EN / W.Nr.
- 1.4404
- Butt-weld
- A403 WP316L, ASME B16.9
- Forged
- A182 F316L, ASME B16.11
Sizes and weights
SS 316L fittings sizes, weighed at 8 g/cm³
Other sizes on request. For general fittings information, such as manufacturing routes and end finishes, see the fittings guide.
Butt-weld ½" – 48" (larger fabricated to order) in schedules matching the pipe; socket-weld and threaded ⅛" – 4" in Class 2000, 3000, 6000 and 9000
Chemistry
SS 316L composition
- UNS
- S31603
- EN / W.Nr.
- 1.4404 · X2CrNiMo17-12-2
- Density
- 8 g/cm³
- PREN
- 23 – 25
| Element | Limit, % | Why it matters |
|---|---|---|
| C | 0.030 max | |
| Mn | 2.00 max | |
| P | 0.045 max | |
| S | 0.030 max | |
| Si | 0.75 max | |
| Cr | 16.0 – 18.0 | |
| Ni | 10.0 – 14.0 | |
| Mo | 2.00 – 3.00 | |
| N | 0.10 max |
Limits per ASTM A240; other product forms and specifications differ slightly. Your order's specification and edition govern.
Questions
About SS 316L fittings
Are SS 316L fittings available in schedule 10S?
Yes, in common sizes, matching thin-wall process pipe.
Do you supply sanitary SS 316L fittings?
Butt-weld process fittings, yes; hygienic clamp fittings on request.
From enquiry to dispatch
How a SS 316L fittings order runs
- 01 EnquiryGrade, specification, size, quantity
- 02 ReviewChecked against your standard
- 03 InspectPMI, dimensions, TPI if required
- 04 CertifyEN 10204 3.1 / 3.2, heat traceable
- 05 ShipPacked and documented for the destination
Need SS 316L fittings?
Send size, quantity, specification and destination. We reply with availability, certificates and delivery.