PP-J807RH Low hydrogen sodium high toughness welding rodDetailed product description：

PP-J807RH is an ultra-low hydrogen high toughness welding rod with low hydrogen sodium coating. It adopts DC reverse connection and can be used for all position welding. The welding process performance is good, and the deposited metal has good comprehensive mechanical properties, as well as good low-temperature impact toughness and crack resistance.

Suitable for welding low-alloy quenched and tempered high-strength steels with a yield strength of 685MPa (such as 14MnMoNbB, HQ80, HQ80C, etc.), applied in fields such as hydropower station downcomers, pressure vessels, bridges, machinery, mining, and marine engineering. It is also a well matched welding rod with WCF80 steel.

Chemical composition of deposited metal (%)

Elements	C	Mn	Si	Cr	Ni	Mo	S	P
standard value	≤0.10	1.30~ one point eight zero	≤0.50	≤0.60	1.40~ two	0.30~ zero point six zero	≤0.020	≤0.020

Mechanical properties of deposited metal (as welded)

Test Project	tensile strength Rm/ MPa	yield strength ReLOr Rp0.2/ MPa	elongation A / %	-40 ℃ impact absorption energy AKV/ J
standard value	≥785	≥685	≥15	≥34

X-ray inspection: Level I.
Moisture content of drug skin or diffusion hydrogen content of deposited metal: ≤ 0.10% or ≤ 5.0mL/100g (chromatographic or mercury method) or ≤ 2.0mL/100g (glycerol method).
Reference current (DC+)

Welding rod diameter/mm	three point two	four	five
Welding current/A	90~120	130~170	170~210

Notes:
1. Before welding, the welding rod must be baked at 350 ℃~400 ℃ for 1-2 hours. It is recommended to place it in a 100-150 ℃ insulation cylinder for immediate use.
2. Before welding, impurities such as rust, oil stains, and moisture must be removed from the welded parts.
3. Short arc operation is required during welding, and narrow pass welding is preferred.