G-TECH 310H

SMAW
  • SUPERAUSTENITIC STEELS
310H

Description

High C basic coated 310 electrode
Basic electrode developed for welding or repairing high alloy heat and corrosion resistant castings of the same general composition. It can be used to weld HK40 base material for centrifugally cast tubes operating at approx. 1000° C . Applications include components for petrochemical and chemical plants and components for cement, ceramic and steel industries. Ease of slag removal reduces post-welding cleaning operations to a minimum.
Specifications
ISO 3581-A
E 25 20 H B
AWS A5.4
E310H-15
Shielding
-
Positions
PA, PB, PC, PD, PE, PF
Current
DC+;
Packaging Type
Carton box
Asme qualifications
F-No (QW432)
5
A-No (QW442)
-

Pren

26.33
Chem. Comp. %
DEFAULT
C
0.4
Mn
1.7
Ni
21
Cr
26
P
0.02
S
0.01
Mo
0.1
Si
0.5
Cu
0.05
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
760
Yield strength Rp0.2 MPa
350
550
Elongation A (L0=5d0) %
20
18
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
2.5 mm
3.2 mm
4 mm
5 mm
Ampere
50A - 80A
80A - 110A
110A - 150A
150A - 200A
Voltage
-
-
-
-
Packaging
56 pcs/kg
29 pcs/kg
19 pcs/kg
12 pcs/kg
Packaging Type
Carton box
Carton box
Carton box
Carton box
Description

Application

It stands as a meticulously engineered welding solution crafted specifically for the welding of HK40, a recognized standard material extensively used in centrifugally cast tubes that operate within the temperature range of approximately 1000°C. This particular alloy finds prominent application in critical components, notably reformer and steam cracker coils, strategically deployed in chemical and petrochemical plants. The versatility of G-TECH 310H extends beyond its role in centrifugally cast tubes, encompassing a spectrum of components across diverse industries. These include billet skids, calcinating tubes, kiln nose segments, conveyor rolls, and various furnace structural items, particularly in the cement, ceramic, and steel sectors. One notable feature of G-TECH 310H is its operational efficiency, eliminating the need for both preheating and post-weld heat treatment (PWHT). This attribute not only streamlines the welding process but also enhances the overall applicability and convenience of this welding solution in a range of high-temperature applications.

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).

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