Structural Steel Welding Electrode

Product Specifications

Technical details and manufacturing context for Structural Steel Welding Electrode

Definition

A consumable welding electrode specifically formulated for joining structural steel products such as beams, columns, and frameworks. It consists of a metal core wire coated with flux compounds that stabilize the arc, shield the molten weld pool from atmospheric contamination, and add alloying elements to the weld metal. This material is essential in fabrication shops and construction sites for creating permanent, high-strength connections between structural members. Proper electrode selection ensures weld integrity matching the base metal's mechanical properties.

The electrode is available in nominal diameters from 2.5 to 5.0 mm and standard lengths of 350 to 450 mm, per ISO 544. The deposited weld metal exhibits a minimum tensile strength of 490–660 MPa, yield strength of 390–540 MPa, elongation of 20–30%, and Charpy V-notch impact energy of 47–80 J, as referenced in ISO 2560. The coating factor (ratio of flux weight to core wire weight) ranges from 1.3 to 1.8. Typical operating parameters include a welding current of 80–220 A (AC or DC+), arc voltage of 20–28 V, and an operating temperature range of -20 to 50 °C. Storage should be at a relative humidity of ≤60%. The weight per 100 pieces depends on diameter and length, typically 5–20 kg.

This electrode is designed for manual arc welding of structural steel. The flux coating decomposes during welding to produce shielding gas and slag, protecting the weld metal. It is suitable for use in fabrication and construction environments. Always verify model-specific values and standards with the legal manufacturer or supplier before use.

Working Principle

The electrode conducts electrical current to create an arc that melts both the electrode tip and the base metal, while the flux coating decomposes to form shielding gas and slag that protect the solidifying weld metal. The arc provides the heat necessary for fusion, and the flux also introduces alloying elements to enhance the weld's mechanical properties. The slag layer covers the weld bead, slowing cooling and preventing oxidation. This process ensures a sound, high-strength joint suitable for structural applications.

Common Materials

Low-carbon steel core wire, Calcium carbonate flux coating, Ferroalloy powder additives

Technical Parameters

Parameter	Typical range	Notes & selection driver
DiameterRequired	2.5–5.0 mm	Nominal diameter of electrode core wireISO 544
Tensile StrengthRequired	490–660 MPa	Minimum tensile strength of deposited weld metalISO 2560
Yield StrengthRequired	390–540 MPa	Minimum yield strength of deposited weld metalISO 2560
ElongationRequired	20–30 %	Minimum percentage elongation of weld metalISO 2560
Impact Toughness	47–80 J	Charpy V-notch impact energy at specified temperatureISO 2560
Coating Factor	1.3–1.8 ratio	Ratio of flux coating weight to core wire weightISO 544
Operating Temperature	-20–50 °C	Storage and welding environment
Humidity	≤60 % RH	Max relative humidity for storage
Welding Current	80–220 A	AC or DC+
Arc Voltage	20–28 V	Typical operating range
Weight per 100 pcs	5–20 kg	Depends on diameter and length
Length	350–450 mm	Standard electrode lengthISO 544

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Core Wire Part
Conducts current and provides filler metal for weld deposit

Material: Low-carbon steel with controlled manganese and silicon content
Flux Coating Part
Stabilizes arc, provides shielding, adds alloying elements, forms slag

Material: Mineral compounds (carbonates, silicates) with ferroalloy powders

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Structural Steel Welding Electrode.

Manufacturers of Structural Steel Welding Electrode

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Zhuzhou Chuangrui Cemented Carbide Co., Ltd.

Hunan, CN

Also makes: Spray Nozzle, Jaw Crusher

Listed on the company's own website · profile compiled by CNFX from public sources

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Frequently Asked Questions

What is the typical diameter range for this electrode?

The nominal diameter of the core wire ranges from 2.5 to 5.0 mm, as per ISO 544. Always confirm the exact diameter for your application with the supplier.

What tensile strength can be expected from the weld metal?

The minimum tensile strength of the deposited weld metal is 490–660 MPa, referenced in ISO 2560. Actual values depend on welding conditions and must be verified.

What welding current types are supported?

The electrode can be used with AC or DC+ (direct current electrode positive). The recommended current range is 80–220 A, but always check the manufacturer's data.

How should this electrode be stored?

Store in a dry environment with relative humidity ≤60% and temperature between -20 and 50 °C. Keep the packaging sealed to prevent moisture absorption, which can affect weld quality.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	N/A (consumable, not pressure-retaining)
other spec:	AWS A5.1/A5.5 classification compliance, typical tensile strength: 70-80 ksi (480-550 MPa), typical yield strength: 58-67 ksi (400-460 MPa)
temperature:	Ambient to 400°C (752°F) post-weld service temperature

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