G-TECH 310

SMAW
  • SUPERAUSTENITIC STEELS
310

Description

Rutile-basic coated electrode for 310 stainless steels
This electrode is used to weld 310 fully austenitic stainless steels. Applications include heat shields, furnace and boiler parts, heat exchanger and ducting for the good resistance to high temperature oxidation of these alloys. Also suitable for dissimilar joints, buffer layers, weld overlay and cryogenic applications. Excellent weldability with a spatter free arc, self-releasing slag producing a very smooth bead appearance.
Specifications
ISO 3581-A
E 25 20 R 12
AWS A5.4
E310-16
Shielding
-
Positions
PA, PB, PC, PD, PE, PF
Current
DC+, AC
Packaging Type
Carton box
Asme qualifications
F-No (QW432)
5
A-No (QW442)
-

Pren

26.66
Chem. Comp. %
DEFAULT
C
0.1
Mn
2
Ni
21
Cr
26
P
0.02
S
0.01
Mo
0.2
Si
0.6
Cu
0.1
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
580
Yield strength Rp0.2 MPa
350
400
Elongation A (L0=5d0) %
20
40
Impact Charpy ISO-V
-
70J @ 20°C
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
310
Description

Application

Utilized for welding comparable wrought or cast 25%Cr-20%Ni (310) parent alloys with up to 0.25% carbon, this consumable is crafted to maximize resistance to solidification cracking and microfissuring. In the Mn version, the weld metal incorporates a manganese range elevated to 2-5%. The high alloy content of type 310 imparts valuable oxidation resistance, effective up to peak temperatures of approximately 1200°C, making it well-suited for applications like heat shields, furnace parts, and ducting. These consumables are versatile, accommodating mixed welding and dissimilar joints, even those requiring post-weld heat treatment (PWHT). It's important to note that the relatively high thermal expansion coefficient may induce thermal fatigue in transition joints subjected to thermal cycling, leading to a preference for nickel-base consumables in such cases. Additional applications include buffer layers and surfacing. The fully austenitic weld metal is beneficial for specialized applications requiring low magnetic permeability (typically <1.01). 310 weld metals inherently maintain toughness down to –196°C, making them suitable for cryogenic installations. No preheat is required. It is advisable to keep the interpass temperature below 150°C and the heat input below 1.5 kJ/mm, particularly crucial for high heat input processes such as SAW.

Alloy Type

25%Cr-20%Ni (310) stainless steel.

Microstructure

Fully austenitic.

Materials


EN W. N.: 1.4826 (GX40CrNiSi22-10), 1.4828 (X15CrNiSi2012,), 1.4837 (GX40CrNiSi25-12), 1.4840 (GX15CrNi2520), 1.4841 (X15CrNiSi25-21), 1.4846 (X 40 CrNi 25-21), 1.4847 (X 8 CrNiAlTi 20-20), 1.4848 GX40CrNiSi25-20), 1.4335 (X1CrNi25-21), 1.4435 (X2CrNiMo18-14-3), 1.4446 (X1CrNiMoN22-25-3), 1.4547 (X3CrNiMoTi25-25).
ASTM: 310, 310S, CK20, 305, 314, 725LN, 316L .
UNS: S31000, S31008, S31050, S31603.

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