Lincoln Jet-LH MR RSP is an AWS A5.1/A5.1M E7018 H4R SMAW stick electrode family with 70 ksi minimum tensile and DC+ or AC, all positions operation. WeldingMart stocks 3 package and diameter variants of this grade, all sharing the same AWS classification - select the diameter and package format that fits your application below.
E7018 H4R is an AWS A5.1 low-hydrogen iron-powder basic-coated SMAW electrode with 70 ksi minimum tensile, plus the H4 diffusible-hydrogen designator (≤4 mL/100g deposited weld metal) and the R designator for low-moisture-pickup coating. H4R coatings resist atmospheric moisture pickup, reducing the risk of hydrogen-induced cracking on high-restraint and high-strength weldments. Runs DC+ or AC in all positions; preferred for code-quality structural, pressure-vessel, and shipbuilding work where strict hydrogen control is required.
| AWS classification | AWS A5.1/A5.1M E7018 H4R |
|---|---|
| Minimum tensile | 70 ksi minimum |
| Polarity / position | DC+ or AC, all positions |
| Available diameters | 3/32 in through 1/4 in (varies by package) |
| Package formats | see size variants below |
- Brand-authorized distributor - factory-fresh stock, full warranty pass-through
- Multiple diameter and package variants in stock - select the SKU below that matches your job
- US warehouse fulfillment, 1 business day ship time
- 30-day returns on unopened cartons