HASTELLOY® C-2000® alloy Site
Principal Features
Physical Properties
Corrosion Data
Iso-Corrosion Diagrams
Mechanical Properties
Welding and Fabrication
Machining
Specifications
HASTELLOY® C-2000® alloy Technical Brief
HASTELLOY® C-2000® alloy Wire Information
Metallurgist Support
Sales Office Addresses
Tubular Products
Fittings & Flanges
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Welding and Fabrication |
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| Welding |
The weldability of C-2000 alloy is similar to that of C-276 alloy. To weld the C-type alloys, three processes are commonly used. For sheet welds and plate root passes, gas tungsten arc (GTAW) welding is favored. For plate welds, the gas metal arc (GMAW) process is preferred. For field welding, the shielded metal arc process, using coated electrodes, is favored. Submerged arc welding is not recommended as this process is characterized by high heat input to the base metal and slow cooling of the weld.
To minimize the precipitation of second phases in regions affected by the heat of welding, a maximum interpass temperature of 93°C (200°F) is recommended for the C-type alloys. Also, welding of cold-worked materials is strongly discouraged, since they sensitize more quickly and induce residual stresses. A full solution anneal, followed by water quenching, is recommended for cold-worked structures prior to welding.
Base Metal Preparation
The joint surface and adjacent area should be thoroughly cleaned before welding. All grease, oil, crayon marks, sulfur compounds, and other foreign matter should be removed.
Filler Metal Selections
For gas tungsten arc and gas metal arc welding, C-2000 filler wire (ERNiCrMo-17) is suggested. For shielded metal arc welding, C-2000 covered electrodes (ENiCrMo-17) are suggested. |
| Tensile Data for Weldments |
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Test Temperature |
0.2% Offset Yield Strength |
Ultimate Tensile Strength |
Elongation |
Welding Process |
Form |
°C |
°F |
MPa |
ksi |
MPa |
ksi |
% |
Gas Tungsten Arc Welding (GTAW)
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Transverse Sample from Welded Plate of Thickness of 12.7mm / 0.5in |
RT |
RT |
465 |
67.4 |
778 |
112.8 |
36.4 |
260 |
500 |
326 |
47.3 |
642 |
93.1 |
42.1 |
538 |
1000 |
299 |
43.3 |
558 |
80.6 |
38.9 |
| All Weld Metal Sample of Diameter 12.7mm / 0.5in from Cruciform |
RT |
RT |
493 |
71.5 |
733 |
106.3 |
44.0 |
260 |
500 |
391 |
56.7 |
614 |
89.0 |
47.4 |
538 |
1000 |
365 |
52.9 |
528 |
76.6 |
46.6 |
| Synergic Gas Metal Arc Welding (GMAW) |
Transverse Sample from Welded Plate of Thickness 12.7mm / 0.5in |
RT |
RT |
456 |
66.2 |
783 |
113.5 |
42.1 |
260 |
500 |
352 |
51.1 |
654 |
94.8 |
43.1 |
538 |
1000 |
301 |
43.7 |
582 |
84.4 |
45.6 |
| All Weld Metal Sample of Diameter 12.7mm / 0.5in from Cruciform |
RT |
RT |
495 |
71.8 |
740 |
107.4 |
46.5 |
260 |
500 |
394 |
57.2 |
620 |
89.9 |
46.4 |
538 |
1000 |
377 |
54.7 |
552 |
80.1 |
50.5 |
| Shielded Metal Arc Welding |
Transverse Sample from Welded Plate of Thickness 25.4mm / 1.0in (Flat Position) |
RT |
RT |
364 |
52.8 |
718 |
104.1 |
58.1 |
| All Weld Metal Sample of Diameter 12.7mm / 0.5in taken from Plate Weld |
RT |
RT |
510 |
74.0 |
744 |
107.9 |
40.4 |
450 |
842 |
386 |
56.0 |
565 |
81.9 |
43.9 |
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| Charpy V-Notch Impact Data for Weldments |
Welding Process |
Form |
Notch Position |
Test Temperature |
Impact Strength |
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°C |
°F |
J |
ft.lbf |
Synergic Gas Metal Arc Welding (GMAW) |
Transverse Sample from Welded Plate of Thickness 12.7mm / 0.5in |
Mid-Weld |
RT |
RT |
142 |
105 |
-196 |
-320 |
106 |
78 |
Heat Affected Zone |
RT |
RT |
240 |
177 |
-196 |
-320 |
203 |
150 |
Shielded Metal Arc Welding (Stick) |
All Weld Metal Sample taken from Plate Weld |
In Weld |
RT |
RT |
71 |
52 |
-196 |
-320 |
45 |
33 |
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| Fabrication |
Heat Treatment
Wrought forms of HASTELLOY C-2000 alloy are furnished in the solution annealed condition, unless otherwise specified. The standard solution annealing treatment consists of heating to 1135°C (2075°F) followed by rapid air-cooling or water quenching. Parts which have been hot formed should be solution annealed prior to final fabrication or installation.
Forming
C-2000 alloy has excellent forming characteristics, and cold forming is the preferred method of shaping. The alloy can be easily cold worked due to its good ductility. The alloy is generally stiffer than the austenitic stainless steels; therefore, more energy is required during cold forming. For further information, please consult publication H-2010. |
| Health and Safety |
| Welding can be a safe occupation. Those in the welding industry, however, should be aware of the potential hazards associated with welding fumes, gases, radiation, electric shock, heat, eye injuries, burns, etc. Also, local, municipal, state, and federal regulations (such as those issued by OSHA) relative to welding and cutting processes should be considered.
Nickel-, cobalt-, and iron-base alloy products may contain, in varying concentration, the following elemental constituents: aluminum, cobalt, chromium, copper, iron, manganese, molybdenum, nickel and tungsten. For specific concentrations of these and other elements present, refer to the Material Safety Data Sheets (MSDS) available from Haynes International, Inc.
Inhalation of metal dust or fumes generated from welding, cutting, grinding, melting, or dross handling of these alloys may cause adverse health effects such as reduced lung function, nasal and mucous membrane irritation. Exposure to dust or fumes which may be generated in working with these alloys may also cause eye irritation, skin rash and effects on other organ systems The operation and maintenance of welding and cutting equipment should conform to the provision of American National Standard ANSI/AWS Z49.1, "Safety in Welding and Cutting". Attention is especially called to Section 4 (Protection of Personnel) and 5 (Health Protection and Ventilation) of ANSI/AWS Z49.1. Mechanical ventilation is advisable and, under certain conditions such as a very confined space, is necessary during welding or cutting operations, or both, to prevent possible exposure to hazardous fumes, gases, or dust that may occur. |
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