309H
Application
Consumables designed for welding heat-resistant steels, including wrought, forged, and cast grades. Also suitable for ferritic Cr–Si–Al steels with high-temperature resistance. Typical applications include annealing and heat treatment plants, steam boiler construction, and the petrochemical and ceramic industries. The product is particularly suitable for use in oxidizing atmospheres, thanks to its high oxidation resistance up to approximately 1000 °C. Designed for high-temperature service, it is also suitable for welding dissimilar joints and for cladding/overlay applications. For ferritic steels, preheating and interpass temperature control within the range of 200–300 °C are recommended to reduce the risk of cracking and to ensure adequate weld joint properties.
Alloy Type
High carbon version of 309 stainless steel for high-grade applications service temperature.
Microstructure
Austenitic deposited with a ferrite content of approx. 8 %
Materials
- EN W.Nr.: 1.4821 (X15CrNiSi25-4), 1.4823 (GX40CrNiSi27-4), 1.4713 (X10CrAlSi7), 1.4724 (X10CrAlSi13), 1.4742 (X10CrAlSi18), 1.4762 (X10CrAlSi25), 1.4710 (GX30CrSi7), 1.4740 (GX40CrSi17), 1.4828 (X15CrNiSi20-12), 1.4826 (GX40CrNiSi22-10), 1.4833 (X12CrNi23-13)
- ASTM: 327, A297 HC, 305
Products of the line 309H
| Product name | Process | AWS specifications | EN ISO specifications | |
| DAIKOWT 309H | GTAW |
AWS A5.9
ER309 |
EN ISO 14343-A
W 23 12 H |
|
| DAIKOWM 309H | GMAW |
AWS A5.9
ER309 |
EN ISO 14343-A
G 23 12 H |
|
| DAIKOWS 309H | SAW |
AWS A5.9
ER309 |
EN ISO 14343-A
S 23 12 H |
|
| G-TECH 309H | SMAW |
AWS A5.4
E309H-16 |
EN ISO 3581-A
E 23 12 R 32 |
