Application
The product is primarily used for welding 25% Cr-20% Ni (310) alloys, which can be wrought or cast, and contain up to 0.25% carbon. To ensure maximum resistance to cracking and microfissures during solidification, the manganese content in the welding metal is increased to 2-5%. The high alloy content of type 310 provides excellent oxidation resistance up to maximum temperatures of about 1200 °C, making it ideal for heat shields, furnace components, and ducts. These consumables are also suitable for mixed welds and dissimilar joints, including those where PWHT application is necessary. However, it is important to consider that the relatively high thermal expansion coefficient may cause thermal fatigue in transition joints subjected to thermal cycling. In such situations, the use of nickel-based consumables is generally recommended. Further applications include cushioned layers and overlays. The fully austenitic welding metal is suitable for specialized applications requiring low magnetic permeability (typically <1.01). Additionally, 310 welding metals intrinsically withstand temperatures down to –196 °C, making them suitable for cryogenic installations. Preheating is not necessary. It is preferable to maintain the interpass temperature below 150 °C and heat input below 1.5 kJ/mm; this is crucial especially for processes with high heat input, 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

Products of the line 310

Product name Process AWS specifications EN ISO specifications
DAIKOWT 310Mn GTAW
AWS A5.9
(E310)
EN ISO 14343-A
W 25 20
DAIKOWT 310 GTAW
AWS A5.9
ER310
EN ISO 14343-A
W 25 20
G-TECH 310 SMAW
AWS A5.4
E310-16
EN ISO 3581-A
E 25 20 R 12
G-TECH 310B SMAW
AWS A5.4
E310-15
EN ISO 3581-A
E 25 20 B 42
G-TECH 310Mn SMAW
AWS A5.4
(E310-16)
-
G-TECH 310Mo SMAW
AWS A5.4
E310Mo-16
EN ISO 3581-A
E Z 25 20 3 R 12
DAIKOWM 310Mn GMAW
AWS A5.9
(E310)
EN ISO 14343-A
G 25 20
DAIKOWM 310 GMAW
AWS A5.9
ER310
EN ISO 14343-A
G 25 20
DAIKOFCW 310 FCAW
AWS A5.22
E310T0-1/4
EN ISO 17633-A
T 25 20 R C1-M21 3
DAIKOWS 310 SAW
AWS A5.9
ER310
EN ISO 14343-A
S 25 20
DAIKOWT 310Mo GTAW
AWS A5.9
(ER310Mo)
EN ISO 14343-A
W 25 22 2 N L
DAIKOWM 310Mo GMAW
AWS A5.9
(ER310Mo)
EN ISO 14343-A
G 25 22 2 N L

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