Stainless Steel 317/317L Forged Fittings Manufacturer & Supplier
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Benefits of ASTM A182 F317L Forged Fittings:
These fittings provide good resistance to sulphuric, acetic, and formic acids, making them ideal for highly corrosive applications.
- SS 317L forged pipe fittings socket-weld provide a secure and leak-free connection which is especially useful for high-pressure pipelines.
- DIN 1.4449 / UNS S31703 forged fittings ensure less maintenance resulting in reduced operating downtime and expenses.
- Their low carbon content improves weldability while protecting against sensitisation and intergranular corrosion.
- These fittings maintain mechanical strength and stability even at high temperature to deliver consistent thermal performance.
- The clean internal surface finish of SS 317L forged fittings increase flow efficiency and lowers pressure loss.
- They are highly flexible across industries, delivering consistent results in chemical processing, power generation, and offshore operations.
ASME B16.11 SS 317 Forged Fittings Uses:
Specification of Stainless Steel 317/317L Forged Fittings
Socketweld : 1/8" to 4" NB
Screwed-Threaded : 1/8" to 4" NB
ASTM A182/ASME SA182
ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799
Forge, Cast, Push, Press, etc.
2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS
Socketweld Fittings, Screwed-Threaded Fittings
Types of Stainless Steel 317/317L Forged Fittings
Manufacturing Types
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Threaded Forged FittingsDesigned with internal or external threads, these fittings allow quick assembly and disassembly without welding.
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Socket Weld Forged FittingsThese fittings are joined by inserting the pipe into a recessed area of the fitting and welding around it, ensuring strong, leak-proof joints.
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Screwed FittingsSimilar to threaded types, screwed fittings are connected using screw threads, making installation simple and cost-effective.
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BSPTBushings help reduce the bore size in a fitting or valve connection by joining pipes of varying diameters.
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NPTEnd caps are used to seal a pipeline's end, shielding it from impurities and guaranteeing closed systems' safety.
Forms
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Forged ElbowElbows, which come in 45° and 90° varieties shift the direction of flow with little pressure loss.
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Forged BushingBushings help reduce the bore size in a fitting or valve connection by joining pipes of varying diameters.
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Forged TeeUsed to split or combine flow across three directions essential for branching pipeline.
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Forged CouplingOffer a safe connection between two pipes; threaded and socket-welded options are available.
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Forged PlugClose open pipe ends which are frequently used for isolation or testing.
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Forged CrossWith four openings, cross fittings help connect four pipes used when fluid distribution needs to occur in multiple directions.
Contact us today to discuss how Stainless Steel 317/317L Forged Fittings can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
| SS 317 | 0.08 max | 2.00 max | 1.00 max | 0.045 max | 0.030 max | 18.0 – 20.0 | 3.00 – 4.00 | 11.0 – 15.0 | Balance |
| SS 317L | 0.035 max | 2.00 max | 1.00 max | 0.045 max | 0.030 max | 18.0 – 20.0 | 3.00 – 4.00 | 11.0 – 15.0 | Balance |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
| SS 317 | 8.0 g/cm³ | 1370 – 1400 °C (2500 – 2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
| SS 317L | 8.0 g/cm³ | 1370 – 1400 °C (2500 – 2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 317 | 1.4449 | S31700 | SUS 317 | 317S16 | 03Ch17N14M3 | Z12CND17-13 | X5CrNiMo17-12-2 |
| SS 317L | 1.4438 | S31703 | SUS 317L | 317S11 | 03Ch17N13M3 | Z3CND17-13 | X2CrNiMo18-15-4 |
Stainless Steel Forged Fittings Grades We Offer
Stainless Steel 317/317L Socket Weld Fittings Dimensions
| Nominal Size | Socket Bore Dia | Bore Dia of Fittings | Socket Wall Thickness | Body Wall | Depth of Socket | Center to Bottom of Socket | |||||||||||||||
| D N | NPS | B | D | C | Gmin | J min | A | ||||||||||||||
| 3000 | 6000 | 9000 | 3000 | 6000 | 9000 | 3000 | 6000 | 9000 | 90° Elbow Tee Cross | 45° Elbow | |||||||||||
| ave | min | ave | min | ave | min | 3000 | 6000 | 9000 | 3000 | 6000 | 9000 | ||||||||||
| 6 | 1/8 | 10.9 | 6.1 | 3.2 | 3.18 | 3.18 | 3.96 | 3.43 | 2.41 | 3.15 | 9.5 | 11.0 | 11.0 | 8 | 8 | ||||||
| 8 | 1/4 | 14.3 | 8.5 | 5.6 | 3.78 | 3.30 | 4.60 | 4.01 | 3.02 | 3.68 | 9.5 | 11.0 | 13.5 | 8 | 8 | ||||||
| 10 | 3/8 | 17.7 | 11.8 | 8.4 | 4.01 | 3.50 | 5.03 | 4.37 | 3.20 | 4.01 | 9.5 | 13.5 | 15.5 | 8.0 | 11.0 | ||||||
| 15 | 1/2 | 21.9 | 15.0 | 11 | 5.6 | 4.67 | 4.09 | 5.97 | 5.18 | 9.53 | 8.18 | 3.73 | 4.78 | 7.47 | 9.5 | 15.5 | 19.0 | 25.5 | 11 | 12.5 | 15.5 |
| 20 | 3/4 | 27.3 | 20.2 | 14.8 | 10.3 | 4.90 | 4.27 | 6.96 | 6.04 | 9.78 | 8.56 | 3.91 | 5.56 | 7.82 | 12.5 | 19.0 | 22.5 | 28.5 | 13 | 14 | 19 |
| 25 | 1 | 34 | 25.9 | 19.9 | 14.4 | 5.69 | 4.98 | 7.92 | 6.93 | 11.38 | 9.96 | 4.55 | 6.35 | 9.09 | 12.5 | 22.5 | 27.0 | 32.0 | 14.0 | 17.5 | 20.5 |
| 32 | 1-1/4 | 42.8 | 34.3 | 28.7 | 22.0 | 6.07 | 5.28 | 7.92 | 6.93 | 12.14 | 10.62 | 4.85 | 6.35 | 9.70 | 12.5 | 27.0 | 32.0 | 35.0 | 17.5 | 20.5 | 22.5 |
| 40 | 1-1/2 | 48.9 | 40.1 | 33.2 | 27.2 | 6.35 | 5.54 | 8.92 | 7.8 | 12.70 | 11.12 | 5.08 | 7.14 | 10.15 | 12.5 | 32.0 | 38.0 | 38.0 | 20.5 | 25.5 | 25.5 |
| 50 | 2 | 61.2 | 51.7 | 42.1 | 37.4 | 6.93 | 6.04 | 10.92 | 9.5 | 13.84 | 12.12 | 5.54 | 8.74 | 11.07 | 16.0 | 38.0 | 41.0 | 54.0 | 25.5 | 28.5 | 28.5 |
| 65 | 2-1/2 | 73.9 | 61.2 | 8.76 | 7.62 | 7.01 | 16.0 | 41.0 | 28.5 | ||||||||||||
| 80 | 3 | 89.9 | 76.4 | 9.52 | 8.30 | 7.62 | 16.0 | 57.0 | 32.0 | ||||||||||||
| 100 | 4 | 115.5 | 100.7 | 10.69 | 9.35 | 8.56 | 19.0 | 66.5 | 41.0 | ||||||||||||
Stainless Steel 317/317L Threaded Fittings Dimensions
| Nominal Size | Center-to-End | Outside Diameter of Band | Wall Thickness | Length of Thread | |||||||||||
| DN | NPS | A | H | G min | min | mim | |||||||||
| 90° Elbows, Tees, Crosses | 45° Elbows | ||||||||||||||
| 2000 | 3000 | 6000 | 2000 | 3000 | 6000 | 2000 | 3000 | 6000 | 2000 | 3000 | 6000 | ||||
| 6 8 10 | 1/8 1/4 3/8 | 21 21 25 | 21 25 28 | 25 28 33 | 17 17 19 | 17 19 22 | 19 22 25 | 22 22 25 | 22 25 33 | 25 33 38 | 3.18 3.18 3.18 | 3.18 3.30 3.51 | 6.35 6.60 6.98 | 6.4 8.1 9.1 | 6.7 10.2 10.4 |
| 15 20 25 | 1/2 3/4 1 | 28 33 38 | 33 38 44 | 38 44 51 | 22 25 28 | 25 28 33 | 28 33 35 | 33 38 46 | 38 46 56 | 46 56 62 | 3.18 3.18 3.68 | 4.09 4.32 4.98 | 8.15 8.53 9.93 | 10.9 12.7 14.7 | 13.6 13.9 17.3 |
| 32 40 50 | 1-1/4 1-1/2 2 | 44 51 60 | 51 60 64 | 60 64 83 | 33 35 43 | 35 43 44 | 43 44 52 | 56 62 75 | 62 75 84 | 84 102 | 3.89 4.01 4.27 | 5.28 5.56 7.14 | 10.59 11.07 12.09 | 17.0 17.8 19.0 | 18.0 18.4 19.2 |
| 65 80 100 | 2-1/2 3 4 | 76 86 106 | 83 95 114 | 95 106 114 | 52 64 79 | 52 64 79 | 64 79 79 | 92 109 146 | 102 121 152 | 121 146 152 | 5.61 5.99 6.55 | 7.65 8.84 11.18 | 15.29 16.64 18.67 | 23.6 25.9 27.7 | 28.9 30.5 33.0 |
Stainless Steel 317/317L Forged Fittings Tolerance Chart
| Minimal Diam. | Outer Dia. For Bevel End | Inner Dia. For End | Elbow | Tee | Reducer | Cap | 180° Elbow | |||||
| DN | NPS | A | B | C | M | H | E | O | K | Roughness | ||
| 500-600 | 20-24 | +6.4/-4.8 | 4.8 | 3.2 | 3.2 | 3.2 | 3.2 | 4.8 | 9.6 | – | – | – |
| 650-750 | 26-30 | |||||||||||
| 4.8 | 4.8 | 4.8 | 4.8 | |||||||||
| 800-1200 | 32-48 | |||||||||||
| 1250-1500 | 50-60 | +9.6/-6.4 | 6.4 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | – | |||
| 1550-1750 | 62-70 | +12.7/-9.6 | 9.6 | 12.7 | 12.7 | – | ||||||
| 1800-2000 | 72-80 | +16/-12 | 12 | 16 | 16 | |||||||
| 15-65 | 1/2-2 1/2 | +1.6/-0.8 | 0.8 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 3.2 | 6.4 | 6.4 | 0.8 |
| 80-100 | 3-4 | 1.6 | 1.6 | 6.4 | ||||||||
| 125-200 | 5-8 | +2.4/-1.6 | ||||||||||
| 250-450 | 10-18 | +4/-3.2 | 3.2 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 9.6 | |||
Manufacturing Standards of Stainless Steel 317/317L Forged Fittings
Raw Material
Cutting
Sizing
Heat Treatment
Pickling
Beveling
Polishing
Sand Blasting
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
Applications of Stainless Steel 317/317L Forged Fittings
Why Choose Midland Alloys Inc. for MSS SP‑79/83 317L Socket Weld Fittings:
FAQs – SS 317/317L Forged Fittings
SS 317L has more molybdenum, offering better corrosion resistance than 304L. Ideal for chemical-heavy use.
Yes. Their high molybdenum content resists saltwater corrosion effectively.
Clean regularly with mild detergent and rinse thoroughly to prevent buildup or contamination.
Stainless Steel 317/317L forged fittings work effectively at cryogenic temperature up to 870°C (1598°F).
