E309-16/E309H-16
309H electrodes contain higher carbon over 309 for the welding of austenitic, high carbon 24% Cr –12% Ni stainless steels such as AISI-309-H. The weld deposit of this electrode contains a 0.04-0.08% carbon, which provides higher tensile and creep strengths at elevated temperatures. 309H electrodes have a high deposition rate resulting in excellent efficiency. This electrode may be used in all positions and may be used joint welds in construction parts for applications like industrial furnaces/ovens, chemical engineering and cryogenic applications. It is also used for joining of dissimilar material.
TYPICAL WIRE CHEMISTRY (%)
- | AWS Spec 309-16 | AWS Spec 309H-16 | Typical Weld Metal |
---|---|---|---|
Carbon | 0.15 | 0.04-0.15 | 0.71 |
Chromium | 22.0 | 25.0 | 24.45 |
Nickel | 12.0 | 14.0 | 13.04 |
Molybdenum | 0.75 | 0.75 | 0.04 |
Manganese | 0.5 | 2.5 | 0.60 |
Silicon | 1.00 | 0.60 | 0.60 |
Phosphorus | 0.04 | 0.030 | 0.030 |
Sulfur | 0.03 | 0.010 | 0.010 |
Copper | 0.75 | 0.07 | 0.07 |
Typical mechanical properties of weld metal (C02 shielding gas)
- | AWS Spec | E309H-16 |
---|---|---|
Tensile Strength (psi) | 80,000 min | 82,000-86,000 min |
Yield Strength (psi) | 67-71,000 | |
Elongation in 2" (%) | 30% min | 38.2-41% |