Audited Supplier
C&N is a professional pipe fittings & flange manufacturer in China,
We can produce high quality duplex stainless steel pipe fittings,Duplex stainless steel UNS S31803 /1.4462
Chemical Composition
Chemical Composition Requirements
Tensile & Hardness Requirements
|
|---|
| Item | S31803 | S32205 | S32750 | S32760 |
|---|---|---|---|---|
| Yield Strength min. MPa [ksi] | 450 [65] | 450 [65] | 550 [80] | 550 [80] |
| Tensile Strength min. MPa [ksi] | 620 [90] | 655 [95] | 800 [116] | 750 [109] |
| Elongation in 2" min. % | 20.0 | 20.0 | 15.0 | 25.0 |
| HBW, max | 290 | 290 | 310 | 270 |
*The tensile and hardness tests shall be performed at room temperature.
Manufacture & Heat Treatment
The material for pipe fittings shall consist of forgings, bars, plates, seamless or welded tubular products that confirm to the chemical requirements of relative duplex grades. Duplex stainless steel pipe fittings made to ASTM A815 shall be formed by hammering, pressing, piercing, extruding, upsetting, rolling, bending, fusion welding, machining or by combination of two or more of these operations. Most duplex stainless steel pipe fittings shall be made by a cold forming process such as cold forming of elbows and bends through a die under hydraulic pushing force, cold pressing of reducers and caps, cold extruding of tees. Since duplex stainless steels have much higher strength than common austenitic stainless steels, the power of the cold forming machine shall be sufficient enough to initiate the deformation. In addition, duplex stainless steels are also strongly work hardened as they are deformed. This rapid increase in strength during cold deformation shall be taken into account when determining the maximum material thickness that can be formed on the equipment. When the thickness is too heavy to be cold formed, the hot forming process shall apply. The hot forming temperature shall be controlled between 1100°C [2000°F] and 1150°C [2100°F]. At this temperature range, the duplex stainless steel is soft or ductile enough to be formed but not too soft so that warping or distortion can be avoided. And the increased tendency to form scale above 1150°C can be suppressed.
Type:
Elbow (180 Deg, 90 Deg. & 45 Deg. LR,SR,)
Tee (Equal &Reducingl)
Reducer (Concentric & Eccentric)
CAP,
Stubend (Long &Short)
Material:
Stainless Steel: ASTM A403 WP 304/ 304L/ 304H/ 316/ 316L/ 317/ 317L/ 321/ 310/ 347/ 904L/ etc.
Carbon Steel: ASTM A234 WPB / A420 WPL3/ A420 WPL6/ MSS-SP-75 WPHY 42/46/52/56/60/65/70 etc.
Alloy Steel: ASTM A234 / WP5/ WP9/ WP11/ WP22/ WP91
SIZES:
1/2" N. B. TO 24" N. B. Seamless Pipe Fittings(BW)
1/2" N. B. TO 72" 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
ASTM A815 S31803 dimensionASTM A815 S31803 Elbow markingASTM A815 S31803 Elbow
