Stainless Steel Schedule 40 Pipe Fittings
Schedule 40 Concentric Reducer Butt Weld Pipe Fittings are available in A312 compliant dual certified 316/316L Stainless Steel with a mill finished inner and outer diameter (ID/OD). These stainless weld fittings conform to ASTM A403, ASTM A960, MSS SP-4, ASTM B16.9 (except wall), and MSS SP-43. Schedule 40 fittings are Nominal Pipe Size (NPS), not Tube Outside Diameter (OD).
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Description
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of stainless steel schedule 40 pipe fittings in China. With abundant experience, we warmly welcome you to wholesale customized stainless steel schedule 40 pipe fittings from our factory. For price consultation, contact us.
Products Description
The walls of Schedule 40 pipe and fittings are almost twice as thick as standard 16 gauge Tube OD fittings, making them ideal for custom turbo manifolds and downpipe fabrication. The increased wall thickness provides added durability and is less prone to cracking under the high thermal stress from exhaust gas temperatures.
Products Properties
Composition
Table 1. Composition ranges for 316 grade of stainless steels.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
|---|---|---|---|---|---|---|---|---|---|---|
| 316 | Min | - | - | - | 0 | - | 16.0 | 2.00 | 10.0 | - |
| Max | 0.08 | 2.0 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | 0.10 | |
| 316L | Min | - | - | - | - | - | 16.0 | 2.00 | 10.0 | - |
| Max | 0.03 | 2.0 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | 0.10 | |
| 316H | Min | 0.04 | 0.04 | 0 | - | - | 16.0 | 2.00 | 10.0 | - |
| max | 0.10 | 0.10 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | - |
Mechanical Properties
Table 2. Mechanical properties of 316 grade stainless steels.
| Grade | Tensile Str (MPa) min | Yield Str 0.2% Proof (MPa) min | Elong (% in 50 mm) min | Hardness | |
|---|---|---|---|---|---|
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 316 | 515 | 205 | 40 | 95 | 217 |
| 316L | 485 | 170 | 40 | 95 | 217 |
| 316H | 515 | 205 | 40 | 95 | 217 |
Stainless Steel Schedule 40 Pipe Fittings

SAE 316L grade stainless steel, sometimes referred to as A4 stainless steel or marine grade stainless steel, is the second most common austenitic stainless steel after 304/A2 stainless steel. Its primary alloying constituents after iron, are chromium (between 16–18%), nickel (10–12%) and molybdenum (2–3%), with small (<1%) quantities of silicon, phosphorus & sulfur also present.
Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. It has excellent forming and welding characteristics. It is readily brake or roll formed into a variety of parts for applications in the industrial, architectural, and transportation fields. Grade 316 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.
Customer case

FAQ
Q:How do you make our business long-term and good relationship?
A:We keep good quality and competitive price to ensure our customers benefit ; We respect every customer as our friend and we sincerely do business and make friends with them. No matter where they come from.
Q:what is your delivery time ?
A: Our delivery time is about one week, timing according to the number of customers.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 50% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment.or negotiable
Q: What are the advantages of your company ?
A: We have many professionals, technical personnel, more competitive prices and best after-dales service than other stainless steel companies.
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