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steel grade: AISI 690
R26 / R-26
UNS N06690
Corrosion resistance performance AISI 690 / R-26 / UNS N06690
Maintain a uniform corrosion rate of<0.1 mm/year in high-temperature steam (≥ 300 ℃), and increase the intergranular corrosion resistance by 40% compared to conventional nickel based alloys
Excellent resistance to nitric acid/hydrofluoric acid mixed media, sulfur-containing exhaust gases (such as H ₂ S/SO ₂), and molten glass, suitable for nuclear fuel reprocessing equipment
AISI 690 / R-26 / UNS N06690 , Long term working temperature limit up to 1100 ℃, short-term can withstand extreme environment of 1377 ℃
AISI 690 / R-26 / UNS N06690 chemical composition
| Grade | R-26 |
| C | ≤0.08 |
| Cr | 16.00 - 20.00 |
| Ni | 35.00 - 39.00 |
| Co | 18.00 - 22.00 |
| Mo | 2.50 - 3.50 |
| Ti | 2.50 - 3.00 |
| Al | ≤0.25 |
| Fe | balance |
| B | 0.001 - 0.010 |
| Si | ≤1.50 |
| Mn | ≤1.00 |
| P | ≤0.030 |
| S | ≤0.030 |
AISI 690 / R-26 / UNS N06690 mechanical properties
Yield strength:≥ MPa: 550
Elongation: ≥(%): 15
Reduction of area: ≥ (%): 20
Hardness: HB: 262 ~ 331
Typical applications AISI 690 / R-26 / UNS N06690
Nuclear power field: Steam generator heat transfer tubes (service life>40 years), reactor pressure vessel sealing rings
Chemical equipment: nitric acid concentration tower, acid gas incinerator heat exchanger
Energy Engineering: Coal gasification unit radiation coil, offshore platform desulfurization tower bracket
CONTACT: Kelly He
E-mail: yihe15@aliyun.com
Wechat: hch959884 / 15281602076
