G-TECH 310H is designed to weld HK40 which is one
of the standard materials for centrifugally cast tubes
operating at around 1000°C.
These alloys are used in reformer and steam cracker
coils in chemical and petrochemical plants. Also for
components such as billet skids, calcinating tubes, kiln
nose segments, conveyor rolls, and furnace structural
items in the cement, ceramic and steel industries Generally no preheat or PWHT are required.
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 to be welded
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).
