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ASTM A403 254 SMO Butt welding Fittings
Specifications
| Standards | Designation |
| ASTM | A 403 |
| ASME | SB 403 |
ASTM A403 254 SMO Butt welding Fittings Inventory Stock at factory rate:-
- 90° Long Radius Elbow
- 90° Short Radius Elbow
- 45° Long Radius Elbow
- 45° Short Radius Elbow
- 180° Long Radius Elbow
- 180° Short Radius Elbow
- 1D Elbow
- 1.5D Elbow
- 3D Elbow
- 5D Elbow
- Seamless Buttwelding 45° and 90° Elbows
- Welded Elbows
- Seamless Buttwelding 180° Returns
- Straight Tees and Crosses
- Reducing Outlet Tees and Reducing Outlet Crosses
- Equal Tee
- Reducing Tee
- Equal Cross
- Reducing Cross
- Reducers
- Concentric Reducer
- Eccentric Reducer
- Stub End
- Lap Joint Stub Ends
- Long Stubend
- Short Stubend
- Pipe Cap
- End Cap
- Collar
- Swedge Nipple
- Pipe Nipples
- Barrel Nipple
- Reducing Nipple
- Bend
- Long Radius Bend
- Piggable Bend
- Lateral
Dimensions
Specifications
| Alloy | Common Name | Related Specifications | Tensile Strength | Proof Stress | Elongation | ||
|---|---|---|---|---|---|---|---|
| British | European | United States | |||||
| Alloy 254 | 254SMO | 1.4547 | ASTM A479/A473, /A240 S31254 F44 |
655 [95] |
305 [44.2] |
35 | |
| Specifications of Alloy 254 |
|
Chemical Specification of Alloy 254
| Elements | C | Cr | Fe | Mo | Mn | N | Ni | Nb | P | S | Si | V |
| Minimum | 19.5 | REMAINDER | 6.0 | 0.18 | 17.5 | |||||||
| Maximum | 0.02 | 20.5 | 6.5 | 1.0 | 0.22 | 18.5 | 0.03 | 0.01 | 0.8 |
Basic Properties of Alloy 254- Mechanical Properties
| 0.2% Proof Stress (N/mm2 )[ksi] minimum | 300 [43.5] |
| Ultimate Tensile Strength (N/mm2) [ksi] minimum | 650[94.2] |
| Elongation (%) minimum | 35 |
| Hardness (HBN) | 270 max |
| Reduction of Area(%) minimum | 50 |
Physical Properties of Alloy 254
| Density (Kg.m-3) | 8000 |
| Magnetic Permeability | <1.05 |
| Young’s Modulus (N/mm2) | 200 x 103 |
| Specific Heat 20°C (J.Kg-1.°K-1) | 500 |
| Electrical resistance, 20°C (µ.O.m) | 0.85 |
| Thermal conductivity, 20°C (W.m-1.°K-1) | 13.5 |
Alloy 254 Features
- High strength compared to 316L and 317L austenitic stainless steels
- Excellent ductility and impact strength at both ambient and sub-zero temperatures
- Non-magnetic
- Higher resistance to abrasion, erosion and cavitation erosion than 316 and 317 stainless
- Listed in MR-01-75 for sour service oilfield applications
Machining Advice of Alloy 254 - Hot worked and precipitation hardened
| Operation | Cutting Speed m/min (ft/min) | Feed Rate mm/rev (in/rev) |
Depth of cut mm (in) |
| Milling | 18 (58) | 0.13-0.25 mm/tooth 0.005-0.010 in/tooth |
0.2-3.0 (0.007-0.12) |
| Drilling 6.4mm(1/4") dia | 250rpm | 0.075(0.003) | |
| Drilling 12.7mm(1/2") dia | 250 rpm | 0.125(0.005) | |
| Drilling 25.4mm(1") dia | 150 rpm | 0.28(0.011) | |
| Turning - Roughing | 30 - 45 ( 100 - 150 ) | 0.4-0.5 (0.015-0.020) | 2.5 (0.1) |
| Turning - Finishing | 50 - 60 ( 165 - 200 ) | 0.13-0.20 (0.005-0.008) | 0.5 (0.02) |
| Tooling | Milling/Turning: Carbide (SANDVIK GC 235, SECO T25M) Drilling: HSS, point angle 118°, chisel angle 120° |
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Alloy Comparisons
| Alloy Comparisons | S20910 | S32205 | N05500 | S31254 | FERRALIUM 255-SD50 |
| (0.2% Proof Strength, N/mm2) | 420 | 510 | 690 | 325 | 610 |
Corrosion Rate (mm.y-1)Seawater |
<0.01 | <0.01 | <0.18 | <0.01 | <0.01 |
Corrosion Rate (mm.y-1)10% sulphuric acid at 80°C |
0.7 | 0.4 | 0.1 | <0.15 | <0.15 |
Corrosion Rate (mm.y-1) Boiling 50% nitric acid |
0.18 | <0.15 | 0.15 | <0.15 | <0.15 |
| Wear Properties related to Hardness (HRC) | RC27 | RC25 | RC20 | RC27 | RC27 |
KEY Features of Alloy 254
- Resistant to crevice corrosion in seawater
- Excellent corrosion resistance in seawater and concentrated halide environments
- High resistance to stress corrosion cracking
- Good resistance to erosion corrosion
- Excellent ductility and impact strength at both ambient and sub-zero temperatures
- Low magnetic permeability
Main Export Market
- Eastern Europe
- North America
- Mid East/Africa
- Central/South America
- Asia
- Western Europe
- Australasia
- UAE
U.A.E,
Oman,
Saudi Arabia,
Qatar,
Bahrain,
Egypt,
Turkey
Singapore,
Thailand,
Malaysia
Indonesia
Poland
Italy
Portugal
Spain
Brazil
Chile
Venezuela
Costa Rica
USA
Canada
Angola
Sri Lanka
Russia
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- 254 SMO
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- 254 SMO Spades and Ring Spacers (part of flange connection)
- 254 SMO Weldo Flange / Nipo Flange
- 254 SMO Expander Flange
- 254 SMO Butt welding Fittings
- 254 SMO Butt- Welding Long Radius Elbow
- 254 SMO Butt- Welding Short Radius Elbow
- 254 SMO Butt- Welding 1D Elbow
- 254 SMO Butt- Welding 1.5D Elbow
- 254 SMO Butt- Welding 3D Elbow
- 254 SMO Butt- Welding 5D Elbow
- 254 SMO Butt- Welding Tee
- 254 SMO Butt- Welding Cross
- 254 SMO Butt- Welding Reducers
- 254 SMO Butt- Welding Concentric Reducer
- 254 SMO Butt- Welding Eccentric Reducer
- 254 SMO Butt- Welding Stub End
- 254 SMO Butt- Welding Lap Joint Stub Ends
- 254 SMO Butt- Welding Pipe Cap
- 254 SMO Butt- Welding Collar
- 254 SMO Butt- Welding Swedge Nipple
- 254 SMO Butt- Welding Pipe Nipples
- 254 SMO Butt- Welding Barrel Nipple
- 254 SMO Butt- Welding Reducing Nipple
- 254 SMO Butt- Welding Bend
- 254 SMO Butt- Welding Piggable Bend
- 254 SMO Butt- Welding Lateral
- 254 SMO Threaded Fittings
- 254 SMO Socket weld Fittings
- 254 SMO Pipes & Tubes
- 254 SMO Seamless Pipe
- 254 SMO Welded Pipe
- 254 SMO Seamless Tube
- 254 SMO Welded Tube
- 254 SMO Sheets
- 254 SMO Plates
- 254 SMO Bars
- 254 SMO Rods
- 254 SMO Wire
- 254 SMO Fasteners
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