G-TECH 25.35Nb

SMAW
  • HIGH TEMPERATURE ALLOYS
HP10Cb

Description

Basic coated electrode
Product designed to deposit weld metal which matches the composition of similar casting. It is used at temperature up to 1100°C. The principal applications are pyrolysis coils and reformer tubes in the petrochemical industry. In the as-welded condition the weld metal microstructure consists of austenite with some grain boundary carbides. No preheat or PWHT are required; interpass temperatures below 150°C are recommended. The principal applications are pyrolysis coils and reformer tubes in the petrochemical industry.
Specifications
ISO 3581-A
EZ 25 35 Nb B 32
Shielding
-
Positions
PA, PB, PC, PD, PE, PF
Current
DC+;
Packaging Type
Carton box

Pren

26.99
Chem. Comp. %
DEFAULT
C
0.08
Mn
3.4
Ni
35
Cr
26
Nb
0.8
Mo
0.3
Si
0.4
Cu
0.5
Mechanical Properties
min
variant
Tensile strength Rm MPa
-
610
Yield strength Rp0.2 MPa
-
400
Elongation A (L0=5d0) %
-
34
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
2.5 mm
3.2 mm
4 mm
Ampere
60A - 90A
80A - 110A
100A - 150A
Voltage
-
-
-
Packaging
55 pcs/kg
30 pcs/kg
19 pcs/kg
Packaging Type
Carton box
Carton box
Carton box
Description

Application

These consumables are designed for depositing weld metal that precisely matches the composition of similar castings. Derived from 800-type alloys, this alloy features increased chromium and nickel contents, resulting in enhanced resistance to carburization and oxidation. Operating effectively at temperatures up to 1100°C, it also exhibits remarkable resistance to thermal shock and fatigue. The consumables are particularly suitable for welding applications involving centrifugally cast pyrolysis coils, reformer tubes, return bends, and tees in the petrochemical industry. Typically, there is no need for preheating or post-weld heat treatment (PWHT), and it is advisable to maintain interpass temperatures below 150°C.

Alloy Type

0.1%C-25%Cr-35%Ni-0.6%Nb (HP10Cb) austenitic cast alloy for heat resisting service.

Microstructure

In the as-welded condition the weld metal microstructure consists of austenite with some grain boundary carbides.

Materials


EN W.Nr.: 1.4850, 1.4859, 1.4876.
ASTM: A351 CT15C.
UNS: N08800, N08810, N08811.
PROPRIETARY: Centralloy® H101, 4859 (Schmidt+Clemens), Manaurite® 900 (Manoir Industries), Incoloy® 800, 800H, 800HT (Special Metals), Sanicro® 31 (Sandvik), Nicrofer 3220 (VDM), Paralloy CR39W, CR32W (Doncasters Paralloy), Thermalloy T52 (Duraloy).

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