Corrosion Resistant Alloys
Overview
As the markets needs grow more sophisticated, the demand for development of new products is rising.
On the other hand, it is now a prime task for manufacturers to improve productivity and to reduce investment and maintenance costs. Consequently, demands for corrosion-resistant alloys are growing due to the following needs: improvement in product reliability; consistency in equipments for new processes; optimization of repair and maintenance processes; reduction of equipment maintenance frequency span; reduction of total investment costs by taking into consideration of running and maintenance costs, etc. .
Based on accumulated during over 40 years technological experience in melting, processing, quality control and corrosion-resistance in various industries, Hitachi Metals ,Ltd. Okegawa Works manufactures various corrosion-resistant alloys and also offers related consulting services.
The following list, for reference, is a comprehensive introduction to the various types of alloys. Please note that the values presented are average and are not guaranteed.
Lineup
| Material | Property and application | Equivalent Alloy |
|---|---|---|
| MAT21 | New alloy with improved local corrosion resistance reached by adding Ta to Ni-Cr-Mo type alloys. | |
| MA22 | Better corrosion resistance under oxidizing conditions than MA276. | Hastelloy C-22 |
| MA276 | Excellent corrosion resistance under both oxidizing and reducing conditions. | Hastelloy C-276 |
| MA-C4 | An improved MA276 alloy, with more stability in higher temperature. | |
| MA-B | Outclassing corrosion resistance in reducing conditions such as hydrochloric acid. | Hastelloy B |
| MA-B2 | An improved MA-B alloy, with higher corrosion resistance in welding heat-affected zone. | Hastelloy B-2 |
| MA-G | Excellent corrosion resistance to sulfuric acid and phosphoric acid at high temperatures. | Hastelloy G |
| MA-G3 | Excellent corrosion resistance to sulfuric acid and phosphoric acid at high temperatures. | Hastelloy G-3 |
| MC Alloy | Excellent corrosion resistance to ammonium fluorinated acid, phosphoric acid, and sulfuric acid. Superior high-temperature corrosion resistance. | |
| NC-Ni,LC-Ni | Commercially Pure nickel for industrial use. Superior corrosion resistance against caustic soda and halogen gas. | NC-Ni:Nickel 200 LC-Ni:Nickel 201 |
| MA Plasthard S,B-2 | Screw and cylinder material. It is used for devices which require corrosion resistance and abrasion | |
| MA600,MA600T | Excellent oxidation resistance. It is used as material for industrial furnaces, aircrafts , and nuclear power plants. | Inconel 600 |
| MA625 | Excellent resistance to oxidation and various acid corrosion . It has high fatigue strength. | Inconel 625 |
| MA20NB3 | Excellent corrosion resistance to sulfuric acid and oxidizing acids. | Carpenter 20Cb3 |
| MA825 | Excellent corrosion resistance. It is used for oilfield gas treatment equipments. | Incoloy 825 |
‡Hastelloy,Haynes,C-22 are registered trademarks of Haynes International,Inc.
‡Inconel,Incoloy,Monel are registered trademarks of Special Metals Corporation.
‡Carpenter is a registered trademark of Carpenter Technology Corporation.
Composition
| Material | Ni | Cr | Mo | W | Fe | Co | Cu | etc. |
|---|---|---|---|---|---|---|---|---|
| MAT21 | Bal | 19 | 19 | Low C,Si Ta1.8 | ||||
| MA22 | Bal | 22 | 13 | 3 | 4 | Low C,Si | ||
| MA276 | Bal | 16 | 16 | 4 | 5 | Low C,Si | ||
| MA-C4 | Bal | 16 | 16 | Low C,Si | ||||
| MA-B | Bal | 28 | 5 | |||||
| MA-B2 | Bal | 28 | <2 | Low C,Si | ||||
| MA-G | Bal | 22 | 6.5 | 19.5 | (Nb+Ta)2 | |||
| MA-G3 | Bal | 22 | 7 | 19.5 | Low C | |||
| MC Alloy | Bal | 44 | 1 | Low C | ||||
| NC-Ni,LC-Ni | >99 | |||||||
| MA600,MA600T | Bal | 15 | 7 | (Nb+Ta)3.7 | ||||
| MA625 | Bal | 21.5 | 9 | 2.5 | Nb+Ta | |||
| MA20NB3 | 35.0 | 20 | 2.5 | Bal | 3.5 | |||
| MA825 | 42.0 | 22 | 3 | Bal | 2 |
Product Shape
A=Available, N/A=Not Available
| Alloys | Hot rolling plates |
Cold rolling plates |
Bars Forgings |
Wires | Piping tubes (Includes welded pipes) |
Bolts Nuts |
Equivalent Alloy |
|---|---|---|---|---|---|---|---|
| MAT21 | A | A | A | A | A | A | |
| MA22 | A | A | A | A | A | A | Hastelloy C-22 |
| MA276 | A | A | A | A | A | A | Hastelloy C-276 |
| MA-C4 | A | A | A | A | A | A | Hastelloy C-4 |
| MA-B | A | A | A | A | A | A | Hastelloy B |
| MA-B2 | A | A | A | A | A | A | Hastelloy B-2 |
| MA-G | A | A | A | A | A | A | Hastelloy G |
| MA-G3 | A | A | A | A | A | A | Hastelloy G-3 |
| MC Alloy | A | A | A | A | A | A | |
| NC-Ni,LC-Ni | A | A | A | A | A | A | NC-Ni:Nickel 200 LC-Ni:Nickel 201 |
| MA Plasthard S,B-2 | N/A | N/A | A | N/A | N/A | N/A | |
| MA600,MA600T | A | A | A | A | A | A | Inconel 600 |
| MA625 | A | A | A | A | A | A | Inconel 625 |
| MA20NB3 | A | A | A | A | A | A | Carpenter 20Cb3 |
| MA825 | A | A | A | A | A | A | Incoloy 825 |
‡Hastelloy,Haynes,C-22 are registered trademarks of Haynes International,Inc.
‡Inconel,Incoloy,Monel are registered trademarks of Special Metals Corporation.
‡Carpenter is a registered trademarks of Carpenter Technology Corporation.
Available Specifications
| Alloys | UNS No. or Alloy No. |
Standard | Standard Alloy name |
Plate/ Strip |
Bar | Pipe and Tube |
Equivalent Alloy |
|---|---|---|---|---|---|---|---|
| MAT21 | N06210 | ASME CODE CASE 2302 ASME, ASTM |
Low C Ni-Cr-Mo-Ta | SB575 | SB574, SB564*2 |
SB619*3 SB622*4 SB626*5 |
|
| MA22 | N06022 | ASME, ASTM | Low C Ni-Mo-Cr | SB575 | SB574, SB564*2 |
SB619*3 SB622*4 SB626*5 |
Hastelloy C-22 |
| NW6022 | JIS | NiCr21Mo13Fe4W3 | H4551 | H4553 | H4552*4 | ||
| MA276 | N10276 | ASME, ASTM | Low C Ni-Mo-Cr | SB575 | SB574, SB564*2 |
SB619*3 SB622*4 SB626*5 |
Hastelloy C-276 |
| NW0276 | JIS | NiMo16Cr15Fe6W4 | H4551 | H4553 | H4552*4 | ||
| MA-B | N10001 | ASME, ASTM | Ni-Mo | SB333 | SB335 | SB619*3 SB622*4 SB626*5 |
Hastelloy B |
| NW0001 | JIS | NiMo30Fe5 | H4551 | H4553 | H4552*4 | ||
| MA-B2 | N10665 | ASME, ASTM | Low C Ni-Mo | SB333 | SB335 | SB619*3 SB622*4 SB626*5 |
Hastelloy B-2 |
| NW0665 | JIS | NiMo28 | H4551 | H4553 | H4552*4 | ||
| MA-G | N06007 | ASME, ASTM | Ni-Cr-F2-Mo-Cu | SB582 | SB581 | SB619*3 SB622*4 SB626*5 |
Hastelloy G |
| NW6007 | JIS | NiCr22Fe20M06Cu2Nb | H4551 | H4553 | H4552*4 | ||
| MA-G3 | N06985 | ASME, ASTM | Ni-Cr-F2-Mo-Cu | SB582 | SB581 | SB619*3 SB622*4 SB626*5 |
Hastelloy G-3 |
| NW6985 | JIS | NiCr22Fe20M07Cu2 | H4551 | H4553 | H4552*4 | ||
| NC-Ni | N02200 | ASME, ASTM | Ni | SB162 | SB160 | SB161*4, SB163*6, B725*3, B730*5 |
NC-Ni:Nickel 200 |
| NW2200 | JIS | Ni99 | H4551 | H4553 | H4552*4 | ||
| LC-Ni | N02201 | ASME, ASTM | Low C-Ni | SB162 | SB160 | SB161*4, SB163*6, B725*3, B730*5 |
LC-Ni:Nickel 201 |
| NW2201 | JIS | Ni99?LC | H4551 | H4553 | H4552*4 | ||
| MA600, MA600T | N06600 | ASME, ASTM | Ni-Cr-Fe | SB168 | SB166, SB564*2 |
SB163*6, SB167*4, SB516*5, SB517*3 |
Inconel 600 |
| JIS | NCF600 | G4902 | G4901 | G4903*7 G4904*6 |
|||
| MA625 | N06625 | ASME, ASTM | Ni-Cr-Mo-Cb | SB443 | SB446, SB564*2 |
SB444*4, SB704*5, B705*3 |
Inconel 625 |
| JIS | NCF625 | G4902 | G4901 | G4903*7 G4804 |
|||
| MA20NB3 | N08020 | ASME, ASTM | Cr-Ni-Fe-Mo-Cu-Cb Stabilized | SB463 | SB473 | SB464*8, SB468*9, B704*10, B729*4 |
Carpenter 20Cb3 |
| MA825 | N08825 | ASME, ASTM | Ni-Fe-Cr-Mo-Cu | SB424 | SB425, SB564*2 |
SB163*6, SB423*4, SB704*5, SB705*3 |
Incoloy 825 |
| JIS | NCF825 | G4902 | G4901 | G4903*7 G4904*6 |
‡Hastelloy,Haynes,C-22 are registered trademarks of Haynes International,Inc.
‡Inconel,Incoloy,Monel are registered trademarks of Special Metals Corporation.
‡Carpenter is a registered trademarks of Carpenter Technology Corporation.
