2011年2月10日 · They are the same alloy rod. Lincoln puts H4R on their rods to designate the hydrogen content. Both are rated at 70,000 psi under proper welding procedures. hope that helps and I hope I'm right lol.

DuraMax E7018 H4R is a moisture resistant, hydrogen controlled, vacuum packed, basic coated electrode which is welder friendly and is recommended for welding of mild and medium carbon steel, high strength steel, cast steel and problematic steels.

E7018 H4R and E7018-1 H4R electrode which indicates high toughness at low temperatures as well as very low diffus-ible hydrogen levels. AWS E7018 H4R classification allows maximum atmospheric exposure of nine (9) hours per AWS D1.1-2002 and four (4) hours per AWS D1.5-2002. APPLICATIONS:

Mild Steel, Low Hydrogen • AWS E7018 H4R. Features. Improved coating integrity; Extreme bendability; Premium arc performance; Excellent moisture resistance; Clear puddle and a smooth arc; Typical Applications. Structure; Ship Building; Chemical Processing Structures; Pressure piping; Mild steel; Welding Positions. All except vertical down ...

2022年2月23日 · E7018-1 H4 (E4918-1) is a low hydrogen carbon steel electrode stick welding (SMAW) rod with improved toughness properties. E7018-1 H4 (E4918-1) is similar to E7018 (E4918) in weld metal chemical composition and usability characteristics (such as polarity, coating type for example).

Low hydrogen (or basic) electrodes are designed for applications susceptible to hydrogen cracking. Excalibur® 7018 XMR ™ offers superior moisture resistance even after 24 hours – remaining below the moisture content limit for 15 hours more than required under AWS A5.

EASYARC® 7018-1H4R 是一款多用途的焊条，拥有优良的操作性能。 推荐用于中碳钢和低合金结构钢。 特别适用于包括海洋平台，造船，压力容器以及采矿机械等重要焊接应用。

Excalibur® 7018-1 MR® Stick (SMAW) CLASSIFICATIONS: E7018-1 H4R. Mild Steel, Low Hydrogen • AWS E7018-1 H4R

2021年6月10日 · Sometimes, an Optional Supplemental Designators suffix ‘H4’ or ‘H8’ is used which indicates possible Hydrogen content in the weld: H4 = Less than 4 ml/100 grams. H16 = Less than 16 ml/100 grams. Sometimes a suffix R is used which means the electrode meets the requirement of the absorbed moisture test.

2025年2月9日 · The 7018-H4R is a designation of the 7018 that has a lower amount of diffusible hydrogen. This rod has 4ml of diffusible hydrogen at 100 grams. So what does this mean? It means that this rod has a higher resistance to moisture absorption than the base 7018 rods.