インコロイ800H/HT
Incoloy800H /HT is an austenitic heat resistant alloy widely used in high temperature pressure structures. The high strength of 800H/HT is mainly due to the addition of carbon, aluminum and titanium.
- Grade: Incoloy 800H Class: austenitic heat resistant alloys Melting point range: 2475-2525 °F Density: 8.0 g/cm3 Properties: Alloys
800H alloy has the following characteristics:
1. Excellent corrosion resistance in extremely high temperature water medium up to 500℃
2. Excellent resistance to stress corrosion
3. Good processability
Incoloy 800H Characteristics and Use:
Incoloy 800H/HT is an austenitic heat resistant alloy widely used in high temperature pressure structures. The high strength of 800H/HT is mainly due to the addition of carbon, aluminum and titanium.
- Excellent corrosion resistance in extremely high temperature waterborne media up to 500°C
- Good stress corrosion resistance
- Good processability
Metallographic structure of Incoloy 800H:
800H is a face-centered cubic lattice structure. The extremely low carbon content and increased Ti:C ratio increase the structural stability and maximum resistance to sensitization
and intergranular corrosion. Low temperature annealing at about 950°C ensured the fine grain structure.
Corrosion resistance of Incoloy 800H:
800H can resist corrosion of many corrosive media:
- The high nickel content makes it have good stress corrosion cracking resistance under water corrosion condition.
- The high chromium content makes it have better resistance to pitting and crevice corrosion cracking.
- The alloy has good corrosion resistance of nitric acid and organic acid, but the corrosion resistance of sulfuric acid and hydrochloric acid is limited.
- Good corrosion resistance in oxidizing and non-oxidizing salts, except for the possibility of pitting in halides.
- It is also highly resistant to corrosion in water, steam and mixtures of steam, air and carbon dioxide.
Application range:
- Nitric acid condenser — nitric acid corrosion resistance
- Steam heating pipe — very good mechanical properties
- Heating element tube — good mechanical properties
For applications up to 500°C, the alloy supply state is annealed.
Relate Alloy Type: Incoloy 825
インコロイ800H Physical Performance:
密度 | 8.0g/cm3 |
融合点 | 1350-1400°C |
Incoloy 800H Minimum value of mechanical properties of alloys at room temperature:
学年 | 抗張力 Rm N/mm2 | 降伏強さ RP0.2N/mm2 | 延長率 A5% |
800 | 500 | 210 | 35 |
800H | 450 | 180 | 35 |
Incoloy 800H/HT Chemical Component
インコロイ 800 ファスナーの化学成分
学年 | C | ん | そして | 銅 | S | で | Cr | 鉄 | の | アル |
---|---|---|---|---|---|---|---|---|---|---|
インコロイ800 | 0最大.1 | 最大1.5 | 最大1.0 | 0最大.75 | 0最大.015 | 30-35 | 19-23 | 39.5分 | 0.15-0.60 | 0.15-0.60 |
インコロイ800H | 0.05-0.1 | 最大1.5 | 最大1.0 | 0最大.75 | 0最大.015 | 30-35 | 19-23 | 39.5分 | 0.15-0.60 | 0.15-0.60 |
インコロイ800HT | 0.06-0.1 | 最大1.5 | 最大1.0 | 0最大.75 | 0最大.015 | 30-35 | 19-23 | 39.5分 | 0.25-0.60 | 0.85-1.20 |