DAIKOWT 310Mn

GTAW
  • SUPERAUSTENITIC STEELS
310

Description

Solid rod for 25%Cr-20%Ni-3%Mn stainless steels
Modified 310 wire rod for joining and surfacing of matching and similar heat resisting, rolled, forged and cast steels used in annealing shops, hardening shops, steam boiler construction, crude oil industry and the ceramics industry. Manganese is added to the formulation to improve hot working properties and increase strength, toughness and hardenability. The temperature range between 650 to 900°C should be avoided due to the risk of embrittlement.
Specifications
ISO 14343-A
W 25 20
AWS A5.9
(E310)
Shielding
I1
Positions
PA, PB, PC, PD, PE, PF
Current
DC-
Packaging Type
5kg carton tube
Asme qualifications
F-No (QW432)
6
A-No (QW442)
-

Pren

25.1

Hardness

85HRB
Chem. Comp. %
DEFAULT
C
0.12
Mn
3.3
Ni
20.4
Cr
25.1
P
0.01
S
0.005
Si
1
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
610
Yield strength Rp0.2 MPa
350
400
Elongation A (L0=5d0) %
20
35
Impact Charpy ISO-V
-
90J @ 20°C
Impact Charpy ISO-V
-
32J @ -196°C
Welding Parameters
1.6 mm
2.4 mm
Ampere
80A - 100A
110A - 160A
Voltage
-
-
Packaging
Ø 1,0÷4,0 mm
Ø 1,0÷4,0 mm
Packaging Type
5kg carton tube
5kg carton tube
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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