| Specification： | AWS | ER309 |
| G B | S309 | |
| Shieding Gas： | Ar+1 ~ 2%O2 | |
AWS ER309 is a filler metal often used in submerged arc welding (SAW). It is classified as a "stainless steel" filler metal, and the "309" in the name indicates that it is similar in composition to Type 309 stainless steel. It has a tensile strength of 610 MPa.
AWS ER309 is used for welding stainless steels and can be used in all welding positions. Because of its corrosion resistance, it is commonly used in the food processing, chemical processing and pharmaceutical industries. It is also used in the petrochemical and power generation industries.
In general, the selection of filler metal for SAW should be based on base metal properties, weld location, service environment, and any code or specification requirements.
( 1 ) The molten metal of XMS-309 is 24%Cr-13%Ni austenite structure.
( 2 ) The molten metal contains appropriate ferrite,the welding performance and crack resistance are well..
( 3 ) The Cr content and Ni content of molten metal are high,under 900℃ using XMS-309, it has a good corrosion resistance and strength.
( 4 ) It’s used to weld between carbon steel ,chromium-molybdenum steel with stainless steel, AISI 309S,13Cr,18Cr.
Chemical composition of the weld metal sample (wt%)
（Shieding Gas：Ar+2%O2）
| C | Si | Mn | P | S | Cr | Ni |
| 0.051 | 0.42 | 1.63 | 0.011 | 0.009 | 23.81 | 13.12 |
Mechanical properties of the weld metal sample
（Shieding Gas：Ar+2%O2）
| Tensild Strength MPa | Yield Strength MPa | Elongation % |
| 610 | 430 | 40 |
The specifications of the product and welding condition (DC+)：
| Dia (mm) Welding ondition | 0.8 | 0.9 | 1.0 | 1.2 | 1.4 | 1.6 | |
| Short Circuiting Transfer | Current A | 40 ~ 120 | 60 ~ 140 | 80 ~ 160 | 100 ~ 210 | — | — |
| Voltage V | 15 ~ 20 | 15 ~ 21 | 16 ~ 22 | 17 ~ 22 | — | — | |
| Spray Transfer | Current A | 160 ~ 210 | 170 ~ 260 | 180 ~ 280 | 200 ~ 300 | 210 ~ 320 | 220 ~ 330 |
| Voltage V | 24 ~ 28 | 24 ~ 30 | 24 ~ 30 | 24 ~ 30 | 24 ~ 32 | 24 ~ 32 | |
