310H
Application
G-TECH 310H is specifically designed for the welding of HK40, one of the reference materials for centrifuged tubes operating at temperatures of around 1000°C. These alloys are used in reformer coils and steam cracking in chemical and petrochemical plants. Additionally, they are ideal for components such as billet skids, calcination tubes, furnace ring segments, conveyor rollers, and structural elements in environments like the cement, ceramics, and steel industries. Generally, no preheating operations or post-weld heat treatments (PWHT) are necessary.
Alloy Type
0.4%C-25%Cr-20%Ni (310H) austenitic cast alloy for heat resisting service.
Microstructure
In the as-welded condition the weld metal microstructure consists of austenite with eutectic and secondary carbides.
Materials
- EN W.Nr.: 1.4846 (X40CrNi 25 21), 1.4848 (G-X40CrNiSi 25 20)
- ASTM: SA351 gr. HK40, A608 gr. HK40
- PROPRIETARY: H20 (Doncasters Paralloy), Thermalloy 47 (Duraloy), Lloyds T47 (LBA), HR6 (Cronite)
Products of the line 310H
| Product name | Process | AWS specifications | EN ISO specifications | |
| G-TECH 310H | SMAW |
AWS A5.4
E310H-15 |
EN ISO 3581-A
E 25 20 H B |
