The Lincoln Electric Excalibur\u00ae 7018 MR\u00ae (SKU: ED032588) is a premium low-hydrogen stick electrode engineered for critical welding applications requiring superior mechanical properties and resistance to hydrogen-induced cracking. Conforming to AWS A5.1 E7018 H4R standards, this electrode is distinguished by its “MR” (Moisture Resistant) designation, indicating a coating formulation that absorbs 60% less moisture than typical E7018 electrodes under high-humidity conditions. This characteristic is vital for maintaining the low-hydrogen status (H4) of the weld deposit, ensuring diffusible hydrogen levels remain below 4 mL per 100g of weld metal, thereby significantly reducing the risk of delayed cracking in high-strength steels.<\/p>\n
Mechanically, the Excalibur 7018 MR delivers exceptional results. As-welded properties typically exhibit yield strengths between 60-74 ksi (420-510 MPa) and tensile strengths ranging from 74-87 ksi (510-600 MPa), with elongation values of 24-36%. Impact toughness is robust, offering 20-304 ft-lbs at -20\u00b0F (-30\u00b0C), far exceeding the AWS requirement of 20 ft-lbs. The 3\/32-inch (2.4 mm) diameter is optimized for precision work and all-position welding, operating efficiently on both DC+ (70-110 Amps) and AC (80-120 Amps) currents. The electrode’s coating is designed for extreme bendability, allowing welders to curve the rod for access into difficult joints without the coating spalling or cracking, a common failure point in standard electrodes.<\/p>\n
The chemical composition is tightly controlled, with low carbon (0.04-0.07%) and manganese (1.08-1.51%) content to ensure ductility and weldability. The slag system is formulated for easy removal, often self-peeling, which enhances productivity by reducing post-weld cleanup time. This electrode is particularly suited for code-quality work in industries such as power generation, petrochemical processing, and structural steel erection where radiographic quality is non-negotiable.<\/p>\n","protected":false},"excerpt":{"rendered":"Technical Specification and Performance Analysis The Lincoln Electric Excalibur\u00ae 7018 MR\u00ae (SKU: ED032588) is a premium low-hydrogen stick electrode engineered for critical welding applications requiring superior mechanical properties and resistance to hydrogen-induced cracking. Conforming to AWS A5.1 E7018 H4R standards, this electrode is distinguished by its “MR” (Moisture Resistant) designation, indicating a coating formulation that… View Article<\/a>","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[1961,1959],"product_tag":[],"class_list":{"0":"post-1793897","1":"product","2":"type-product","3":"status-publish","5":"product_cat-steel-electrodes","6":"product_cat-welding-wires-and-electrodes","7":"pa_amp-range-50-85amp","8":"pa_amp-range-70-120amp","9":"pa_aws-spec-e7018-1","10":"pa_aws-spec-e7018","11":"pa_brand-lincoln","12":"pa_diameter-2-5mm","13":"pa_diameter-2-4mm","14":"pa_length-14-in-350-mm","15":"pa_packaging-description-10-lb-can","16":"pa_packaging-description-10lb-can","17":"pa_polarity-ac-dc","18":"pa_polarity-dc-ac","19":"pa_position-all","21":"first","22":"onbackorder","23":"taxable","24":"shipping-taxable","25":"purchasable","26":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product\/1793897","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/media?parent=1793897"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_brand?post=1793897"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_cat?post=1793897"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_tag?post=1793897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}