E71t 8 meaning1/21/2024 Where C means the shielding gas as pure CO 2, ‘M’ refers to the gas mixture of Argon and CO 2 (usually 75%–80% Argon/balance CO 2 shielding gas). The main difference between E71T-1C and E71T-1M is the type of shielding gas used. Types of polarity in SMAW, MIG, MAG, FCAW, TIG, and SAW Difference between E71T-1C and E71T-1M Here, ‘1’ at the third digit, means the electrode is meant for Direct Current Electrode Position polarity only. The E71T-1C can be used only with DCEP polarity. If stated, the letter “ J” when present in the electrode classification (E.g., E71T-1CJ) states that the welding wire meets the requirements for improved weld metal toughness and will deposit a weld metal with Charpy V-Notch properties of at least 20 ft These are optional and can be decided by the purchaser of the wire. Weld deposit Toughness requirements are not mandatory for the flux-cored wires and are usually agreed upon between the purchasers. For example, ‘H4’ mean 4 ml of Average Diffusible Hydrogen can present in maximum of mL/100g Deposited Metal.Ī detailed overview is given in the below figure. ‘H’ given at the end of the electrode classification refer to the amount of diffusible hydrogen present in the weld deposit.The letter “M” means that the wire is classified using 75%–80% Argon/balance CO2 shielding gas. The letter “C” means that this rod is classified using 100% CO2 shielding gas. There can be 1 to 14 number or also can be written as ‘G’. For example, in E71T-1C wire, 1 mean that wire can be used with DCEP. Next digit after hyphen is the electrode usability characteristics. Third digit refer to the welding position, 0 mean Flat & horizontal and 1 mean all positions.Next digit (6 or 7 for example) means electrode minimum tensile strength in Ksi multiplied by 10.The ISO specification or standard for E71T-1C is BS EN ISO 17632.ĪWS A5.20 is FCAW filler wire specification covering all carbon steel welding cored filler wires. 5.20 (AWS A 5.20) (SFA 5.20 can be found in ASME Section IIC). lbf at –0☏ (27J at-20☌) E71T-1C Welding Wire SpecificationsĮ71T-1C or E71T-1M flux-cored wire is supplied as per the SFA No.Properties Value Tensile Strength, Ksi (MPa) 70-95, (490-670) Yield Strength, Ksi (MPa)Įlongation, % minimum 22 Toughness 20 ft E71T-1C chemical compositions are Carbon, Manganese, silicon mainly with additional alloying of chromium, nickel and molybdenum in small amounts.Į71T-1C/ E71T-1M Mechanical Properties (AWS A5.20) E71T-1C Chemical Composition and mechanical propertiesĮ71T-1C Chemical Composition and mechanical properties are given in below table. E71T-1C rod has a rutile coating and can give a high welding output. “M” means that the wire to be used with 75%–80% Argon/balance CO2 shielding gas.ĮXXT-1C (XX can be 60 or 70) and EXXT-1M gives good appearing weld bead finish with low welding spatters and a spray transfer mode.”C” means wire to be used with 100% CO2 shielding gas.The meaning of ‘C’ and ‘M’ in E70T-1C or E70T-1M are: E71T-1C Welding Filler Wire is Flux cored arc welding consumable used for welding of carbon steel, mild steel and low alloy steel materials.īoth the EXXT-1C i.e., E60T-1C or E70T-1C ( XX can be 60 or 70) and EXXT-1M i.e., E60T-1M or E70T-1M electrodes have similar type slags and are designed for single and multiple pass welding using Direct Current Electrode Positive ( Reverse polarity).
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