Seamless Tube And Pipe Stainless Steel ASTM A268 AISI 446 DIN 1.4749
Seamless Tube And Pipe Stainless Steel ASTM A268 AISI 446 DIN 1.4749
Ferritic, heat resisting steel, stainless grade ASTM 446-1, UNS S44600, EN number 1.4749, DIN X18CrN28
can be used at temperatures up to 1100°C (2010°F). However, allowance should be made for low creep strength
at the highest temperatures in order to avoid distortion due to the mass of the steel.
Chemical composition %
| C | Si | Mn | P | S | Cr | Ni | N |
| 0.20 | 1.00 | 1.50 | 0.040 | 0.030 | 23.0~27.0 | 0.75 | 0.25 |
AISI 446 stainless steel Characterized by:
- Extremely good resistance to reducing sulphurous gases
- Very good resistance to oxidation in air
- Good resistance to oil-ash corrosion
- Good resistance to molten copper, lead and tin
Applications
446 stainless steel should be chosen mainly for service at temperatures above 700°C (1290°F)
where the excellent resistance of the material to slag corrosion and sulphidizing gases is particularly advantageous.
Typical applications for 446 stainless steel are:
- Recuperators in the metallurgical and glass industries
- Thermocouple protection tubes
- Sootblower tubes
- Injection nozzles
- Muffle tubes in continous wire annealing furnaces
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