Active Member
|
[China]
Address: No. 810, Baiyu Road, Nanzha Town, Jiangyin City, Jiangsu Province, P.R.China Post Code 214405
Contact name:lian
China Machinery Metal Jiangsu Co., Ltd. |
|
|
Corrosion resistant alloy C-2000 (N06200) pipe, fitting, strip, bar, forging, fastener for chemical process
1 PRODUCT
Corrosion resistant alloy C-2000 (UNS N06200) for chemical process.
Product forms available as pipe, tube, fitting, sheet, strip, plate, round and hexagonal bar, forging, forging stock, wire, spring, fastener etc.
2 EQUIVALENT DESIGNATION
UNS N06200, W.Nr.2.4675, NiCr23Mo16Cu (DIN), AWS 055, Hastelloy® C-2000® Alloy
3 APPLICATION
Applications include reactor, heat exchanger, tower vessel, pipe line, valve, pump, springs, fasteners, and mixer shaft etc for chemical processing, reactors and dryers for pharmaceutical industry, and components of flue gas desulfurization system etc.
4 OVERVIEW
Alloy C-2000 is a copper-bearing Ni-Cr-Mo material with exceptional resistance to sulfuric acid. It is unique among the versatile nickel-chromi- um-molybdenum materials in having a deliberate copper addition. This provides greatly enhanced resistance to sulfuric acid. It also has a high chromium content, to maximize its resistance to oxidizing chemicals and process streams contaminated with ferric ions and dissolved oxygen.
Like other nickel alloys, Alloy C-2000 is ductile, easy to form and weld, and possesses exceptional resistance to stress corrosion cracking in chloride-bearing solutions (a form of degradation to which the austenitic stainless steels are prone). It is able to withstand a wide range of oxidizing and non-oxidizing chemicals, and exhibits outstanding resistance to pitting and crevice attack in the presence of chlorides and other halides.
5 CHEMICAL COMPOSITION
| Standard | Fe | Ni | Cr | Co | Mo | Mn | Si | P | S | C | Al | Cu |
B564 B574 | ≤3.0 | Balance | 22.0-24.0 | ≤2.0 | 15.0-17.0 | ≤0.50 | ≤0.08 | ≤0.025 | ≤0.010 | ≤0.01 | ≤0.50 | 1.3-1.9 |
| VdTÜV 539 | ≤3.0 | Balance | 22.0-24.0 | ≤2.0 | 15.0-17.0 | ≤0.50 | ≤0.08 | ≤0.025 | ≤0.010 | ≤0.01 | ≤0.50 | 1.3-1.9 |
6 PHYSICAL PROPERTIES
Density at room temperature: 0.307 lb/in3 (8.50 g/cm3)
Melting range: 2422-2476°F (1328-1358°C)
7 MECHANICAL PROPERTIES
Typical mechanical properties (Bar and forging in solution annealed condition)
| Properties | Tensile strength | Yield strength | Elongation | Impact strength | |
| Rm MPa | Rp0.2 MPa | Rp1.0 MPa | A% | Av J | |
| ASTM B564 forging | ≥690 | ≥310 | ≥45 | ||
| ASTM B574 bar | ≥690 | ≥310 | ≥45 | ||
| Forging and bar dia.≤90mm | 690-950 | ≥310 | ≥330 | ≥45 | ≥120 |
8 CORROSION RESISTANCE
Resistance to pitting and crevice corrosion
Alloy C-2000 exhibits high resistance to chloride-induced pitting and crevice attack, forms of corrosion to which the austenitic stainless steels are particularly prone. To assess the resistance of alloys to pitting and crevice attack, it is customary to measure their Critical Pitting Temperatures and Critical Crevice Temperatures in acidified 6 wt.% ferric chloride, in accordance with the procedures defined in ASTM Standard G 48. These values represent the lowest temperatures at which pitting and crevice attack are encountered in this solution, within 72 hours. For comparison, the values for 316L, 254SMO, 625, C-276, and C-2000® alloys are as follows. Note that Alloy C-2000 exhibits higher resistance to crevice attack than even C-276 alloy.
| Alloy | Critical Pitting Temperature | Critical Crevice Temperature | ||
| in Acidified 6% FeCl3 | in Acidified 6% FeCl3 | |||
| °F | °C | °F | °C | |
| 316L | 59 | 15 | 32 | 0 |
| 254SMO | 140 | 60 | 86 | 30 |
| 625 | 212 | 100 | 104 | 40 |
| C-276 | >302 | >150 | 131 | 55 |
| C-2000 | 293 | 145 | 176 | 80 |
Other chloride-bearing environments, notably Green Death (11.5% H2SO4 + 1.2% HCl + 1% FeCl3 + 1% CuCl2) and Yellow Death (4% NaCl + 0.1% Fe2(SO4)3 + 0.021M HCl), have been used to compare the resistance of various alloys to pitting and crevice attack (using tests of 24 hours duration). In Green Death, the lowest temperature at which pitting has been observed in C-2000 alloy is 100°C. In Yellow Death, C-2000 alloy has not exhibited pitting, even at the maximum test temperature (150°C).The Critical Crevice Temperature of C-2000 alloy in Yellow Death is 95°C.
Resistance to stress corrosion cracking
One of the chief attributes of the nickel alloys is their resistance to chloride-induced stress corrosion cracking. A common solution for assessing the resistance of materials to this extremely destructive form of attack is boiling 45% magnesium chloride (ASTM Standard G 36), typically with stressed U-bend samples. As is evident from the following results, the three nickel alloys, C-276, C-2000 and 625, are much more resistant to this form of attack than the comparative, austenitic stainless steels. The tests were stopped after 1008 hours (six weeks).
| Alloy | Time to Cracking |
| 316L | 2 h |
| 254SMO | 24 h |
| 625 | No cracking in 1008 h |
| C-276 | No cracking in 1008 h |
| C-2000® | No cracking in 1008 h |
Resistance to seawater crevice corrosion
Seawater is probably the most common aqueous salt solution. Not only is it encountered in marine transportation and offshore oil rigs, but it is also used as a coolant in coastal facilities. Listed are data generated as part of a U.S. Navy study at the LaQue Laboratories in Wrightsville Beach, North Carolina (and published by D.M. Aylor et al, Paper No. 329, CORROSION 99, NACE International, 1999). Crevice tests were performed in both still (quiescent) and flowing seawater, at 29°C, plus or minus 3°C. Two samples (A & B) of each alloy were tested in still water for 180 days, and likewise in flowing water. Each sample contained two possible crevice sites. The results indicate that Alloy C-2000 is very resistant to crevice corrosion in seawater.
| Alloy | Quiescent | Flowing | ||
| No. of Sites Attacked | Maximum Depth of Attack, mm | No. of Sites Attacked | Maximum Depth of Attack, mm | |
| 316L | A:2, B:2 | A:1.33, B:2.27 | A:2, B:2 | A:0.48, B:0.15 |
| 254SMO | A:2, B:2 | A:0.76, B:1.73 | A:2, B:2 | A:0.01, B:<0.01 |
| 625 | A:1, B:2 | A:0.18, B:0.04 | A:2, B:2 | A:<0.01, B:<0.01 |
| C-276 | A:1, B:1 | A:0.10, B:0.13 | A:0, B:0 | A:0, B:0 |
| C-2000 | A:0, B:0 | A:0, B:0 | A:0, B:0 | A:0, B:0 |
9 WORKING INSTRUCTION
Hot working
Alloy C-2000 can be hot forged, hot rolled, hot upset, hot extruded, and hot formed. However, it is more sensitive to strain and strain rates than the austenitic stainless steels, and the hot working temperature range is quite narrow. For example, the recommended start temperature for hot forging is 1232°C (2250°F) and the recommended finish temperature is 954°C (1750°F). Moderate reductions and frequent re-heating provide the best results.
Cold working
The alloy is stiffer than most austenitic stainless steels, and more energy is required during cold forming. Also Alloy C-2000 work hardens more readily than most austenitic stainless steels, and may require several stages of cold work, with intermediate anneals.
While cold work does not usually affect the resistance of Alloy C-2000 to general corrosion, and to chloride-induced pitting and crevice attack, it can affect resistance to stress corrosion cracking. For optimum corrosion performance, therefore, the re-annealing of cold worked parts (following an outer fiber elongation of 7% or more) is important.
Annealing
Wrought products of Alloy C-2000 are supplied in the Mill Annealed (MA) condition, unless otherwise specified. This solution annealing procedure has been designed to optimize the alloy’s corrosion resistance and ductility. Following all hot forming operations, the material should be re-annealed, to restore optimum properties. The alloy should also be re-annealed after any cold forming operations that result in an outer fiber elongation of 7% or more. The annealing temperature for Alloy C-2000 is 1149°C (2100°F), and water quenching is advised (rapid air cooling is feasible with structures thinner than 10 mm (0.375 in). A hold time at the annealing temperature of 10 to 30 minutes is recommended, depending on the thickness of the structure (thicker structures need the full 30 minutes).
10 STANDARD SPECIFICATION
Rod, bar, wire and billet
ASME SB574 / ASTM B574
ASTM B472
NACE MR0175 (ISO 15156-3)
Forgings
ASTM B462
ASME SB564 / ASTM B564
Plate, sheet and strip
ASME SB575 / ASTMB575
Pipe and tube
ASME SB619 / ASTM B619
ASME SB622 / ASTM B622
ASME SB626 / ASTM B626
ASTM B775
ASTM B751
Coated Electrodes
SF A 5.11/ A 5.11 (ENiCrMo-17)
DIN 2.4699 (EL-NiCr23Mo16Cu)
Bare welding rods & wire
SF A5.14/ A5.14 (ERNiCrMo-17)
DIN 2.4698 (SG-NiCr23Mo16Cu)
Fittings
ASME SB366 / ASTM B366
ASME SB462 / ASTM B462
TÜV
Werkstoffblatt 539
Kennblatt 9677
Kennblatt 9678
Kennblatt 9679
Composition
DIN 17744
11 COMPETITIVE ADVANTAGE
(1) More than 50 years experience of research and develop in high
temperature alloy, corrosion resistance alloy, precision alloy,
refractory alloy, rare metal and precious metal material and
products.
(2) 6 state key laboratories and calibration center.
(3) Patented technologies.
(4) Ultra-purity smelting process VIM + IG-ESR + VAR.
(5) High performance material.
12 BUSINESS TERM
| Minimum Order Quantity | Negotiable |
| Price | Negotiable |
| Packaging Details | Water prevent, seaworthy transport, mill’s export standard package |
| Mark | As per order |
| Delivery Time | 60-90 days |
| Payment Terms | T/T, L/C at sight, D/P |
| Supply Ability | 200 metric tons / Month |
