SA403 ASTM A403 Wp316/316L elbow LR SR Elbow ASME B16.9
ASTM A403 WP316/316L elbows, commonly known as 316 stainless steel elbows, are corrosion-resistant butt weld pipe fittings used in chemical, marine, and high-temperature piping systems. Manufactured according to ASME B16.9, they provide excellent resistance to pitting, crevice corrosion, and intergranular corrosion after welding.
What is a 316 Stainless Steel Elbow?
A 316 stainless steel elbow is a pipe fitting used to change the direction of flow (typically 45° or 90°) in a piping system.
It is made from molybdenum-containing stainless steel, which provides:
- Improved corrosion resistance
- Better performance in chloride environments
- Longer service life compared to 304
👉 316 elbows are widely used in marine, chemical, and food processing industries
What is ASTM A403 WP316 / WP316L?
ASTM A403 (ASME SA403) specifies wrought austenitic stainless steel pipe fittings for pressure systems.
Grades:
- WP316 (UNS S31600) – standard carbon
- WP316L (UNS S31603) – low carbon
👉 WP316L is preferred for welded piping systems due to reduced carbide precipitation.
Product Description
The ASTM A403 WP316L Elbow is designed to change the direction of flow in piping systems while maintaining excellent mechanical strength and corrosion resistance. Thanks to the addition of molybdenum and low carbon content, WP316L elbows offer superior resistance to pitting, crevice corrosion, and intergranular corrosion after welding.
We are a SA403 Wp316/316L elbow,ASTM A403 WP316L Elbow,stainless steel elbow,Tee,Butt weld Pipe Fitting manufacturer，We can offer both Seamless and Welded type butt weld fittings.
We also supply the SA403 Wp316/316L pipe fittings from BV/ABS/LR/DNV GL approved factories ,MTC 3.1,MTC 3.2 can be provided
Stainless Steel Welding grade： A403 WP316L-W-X, W refers to Welding,X refers to X-ray
Stainless Steel Seamess grade： A403 WP316L-S,S refers to Seamless.
Seamless fittings are made from ASTM A312 TP316/TP316L Seamless Pipes
Standards & Specifications
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Material Standard: ASTM A403 / ASME SA403
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Grade: WP316 / WP316L (UNS S31600 / S31603)
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Dimensional Standard: ASME B16.9
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Manufacturing Type: Seamless / Welded
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End Connection: Buttweld
Available Types
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90 Degree Elbow (Long Radius / Short Radius)
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45 Degree Elbow
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180 Degree Return Bend
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Reducing Elbow
A403 WP316L PIPE FITTINGS SPECIFICATION
Specifications : ANSI/ASME B16.9, B16.28, MSS-SP-43.
Standard : ASTM A403
ASTM A403 / A403M
Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
Size : ½”NB to 48″NB in Sch 10s, 40s, 80s, 160s, XXS.
Schedules :Sch.40 to Sch.XXs
Type : Seamless / Welded
ASTM A403 WP316L Elbow Chemical Composition
| C | Mn | Si | P | S | Ni | Cr | Mo |
|---|---|---|---|---|---|---|---|
| 0.035 | 2 | 1 | 0.04 | 0.03 | 10-16 | 18-20 | 2-3 |
ASTM A403 WP316L Elbow Mechanical Properties
| Tensile Strength | Yield Strength | Elongation |
|---|---|---|
| 515 (Mpa) | 205 (Mpa) | 35 (%) |
1/2″ N. B. TO 24″ N. B. Seamless Pipe Fittings(BW)
1/2″ N. B. TO 48″ N. B. Welded BW
Marking:Standard/ As per request
Packing: Wooden case(Fumigation free) Or as per request
Inspection: In house and third party
Document: MTC EN10204-3.1 can be provided prior to shipment
WP316L vs 304 Elbow
| Property | 316L Elbow | 304 Elbow |
|---|---|---|
| Corrosion resistance | Excellent | Moderate |
| Chloride resistance | High | Low |
| Marine use | Suitable | Not recommended |
| Cost | Higher | Lower |
How to order our A403 WP316L Pipe fittings.
