E8010, E8010-P1 (E5510-P1) welding rod, MTC, meaning, specification and chemical-mechanical properties


Table of Contents

E8010 (E5510-P1) Welding electrode

E8010 was an earlier electrode classification as per AWS A 5.1 used by the ASME, however, it was discontinued in 1954. E8010 was transferred from AWS A5.1 to AWS A5.5 in 1954 and replaced by E8010-G. Currently, E8010 type electrodes are available in different classifications:

  1. E8010-P1 (E5510-P1)
  2. E8010-G (E5510-G)

Here, E8010-P1 is a high cellulose sodium electrode used for welding for pipeline applications having high strength. CWB/CSA equivalent of E8010-P1 is E5510P1 as per CSA W48-06.

Note: THROUGHOUT THIS POST, E8010 means E8010-P1. Many manufacturers make E8010-G that meets E8010-P1 classification also as a dual classification rod.

Click here to Learn What is E6010 & its hidden coating elements & E6010 Classification.

E8010-P1 (E5510-P1) Welding electrode

E8010-P1 (E5510P1) is a high cellulose sodium electrode used for mainly welding high strength pipelines (cross country oil & gas pipelines, process pipelines, or any other piping jobs that require vertical downhill/ uphill welding). This rod is a cellulose type with little to no slag is mainly used for welding in the vertical position with downward (downhill) and upward (uphill) welding progression. E8010-P1 gives deep welding penetration, spray transfer mode, a narrow, and concentrated welding arc, and little slag making it a highly beneficial rod for welding pipelines in downward progression. The rod is good for making full penetration welds of high radiographic quality in the 5G positions.

E8010, E8010-P1 (E5510-P1) electrode specification

E8010-P1 electrode specification is AWS A5.5 or SFA 5.5. CWB/CSA equivalent of E8010-P1 is E5510P1 as per W48-06. The meaning of the E8010-P1 rod is:

  1. ‘E’ Means welding electrode.
  2. ’80’ means, electrode weld deposit minimum tensile strength as 80ksi.
  3. ‘1’ means the electrode can be used in all welding positions.
  4. ‘0’ refers to the electrode characteristics such as covering type, welding position & welding polarity.
  5. ‘P1’ means the electrode is made for pipeline steel welding with cellulose coating. This also tells the chemical composition of the welding rod.

E8010, E8010-P1 electrode chemical & mechanical properties

The chemical composition & mechanical properties of E8010-P1 (E5510P1) are given in AWS A5.5, Table 2 -3 & listed below for reference. The minimum tensile strength of E8010-P1 (E5510P1) is 80 ksi (550 MPa), yield strength of 67 ksi (460 MPa).

The Charpy impact toughness (minimum weld deposit toughness) required for E8010-P1 (E5510P1) is 20 ft•lbf at –20°F or 27J at –30°C temperature. Any electrode made by any rod manufacturer has to comply with these requirements if they use this classification system of AWS A5.5.

E8010-P1 E5510-P1 chemical mechanical properties

E8010-P1 (E5510-P1) contains maximum of 0.2% carbon, 1.2% manganese, 0.6% silicon, 1.0% nickel, 0.3% chromium, 0.5% molybdenum and 0.1% vanadium (all values are maximum permitted to the electrode manufacturer).

E7024 electrodes specification, properties, polarity, uses, and MTC.

What is welding polarity for E8010, E8010-P1 electrodes?

E8010-P1 (E5510-P1) has sodium as the main coating element and hence it can be used with DCEP (Direct Current Electrode Positive) polarity. Using E8010-P1 on AC and DCEN will not give a stable arc and will result in quality deterioration.

E8010-P1 can be used for welding in all positions such as flat, horizontal, vertical, and overhead welding. It is especially beneficial in vertical downhill welding, making it one of the important welding rods for welding cross-country pipelines.

E8010, E8010-P1 electrode welding current setting

The selection of welding current & voltage setting with E8010-P1 depends on the electrode diameter. For 3.2 millimeters (1/8 inch) stick welding rod, a welding current of 70 amperes to 120 amperes is used. For rod diameter of 4.0 millimeters (5/32 inches), 100-amperes to 160-ampere current is used and 5.0 mm (3/16 inches), 125-amperes to 200-amperes are usually is a good welding current setting for E8010-P1 rod.

E8010, E8010-P1 electrode MTC

An actual MTC of E8010-P1 can be downloaded from this link for reference purposes. The standard MTC contains the 3.1 test for the chemical composition of the welding rod and values for mechanical (Tensile strength, yield strength, elongation & toughness) are typical values. The rod manufacturers assure via the MTC that the weld deposit will meet the minimum specified properties as given by the applicable rod specification.

E8010-G vs. E8010 pipeliner

E8010 pipeliner is a brand name of the E8010-P1 classification as per SFA 5.5. Many manufacturers make E8010-G that meets E8010-P1 classification also as a dual classification rod. If E8010-G meets the minimum requirements of E8010-P1, it can be used in place of E8010-P1 however the client must be notified of such changes and prior approvals to be sought.

In E8018-G means the rod is meant for ‘General’ Classification. When we say general classification for a welding rod, it is called General as the properties are not defined in the rod specification like the case for other rods in the same specification such as AWS A5.5 in this case.

Features/ characteristics of E8010-P1 (E5510-P1) rod

  1. Deep penetration rod with concentrated welding arc.
  2. Clean weld with little slag.
  3. Useful for welding in a vertical downhill position or 5G position.
  4. High-strength welding rod used for welding low alloy steel piping.
  5. Good for welding on cross-country pipeline jobs.

Welding polarity for E8010 stick welding rod

E8010-P1 is used with Direct Current Electrode Positive (DCEP) polarity or also called Reverse Polarity in Welding. Click here to learn about the different types of polarities in Stick Welding, TIG Welding & MIG-MAG welding processes. DCEP polarity gives E8010-P1 a smooth welding arc with easy arc initiation in stick welding.

E8010-P1 Rod coating (Covering) type

The coating type of E8010-P1 pipeliner stick welding rod is High Cellulose Sodium. The coating also contains other elements such as binding agents, de-oxidizers, and alloying elements.


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