--- title: "A18 SG2 (G3Si1) Mild Steel Mig Wire (1.2mm) 5kg Welding" id: "23655" type: "product" slug: "a18-sg2-g3si1-mild-steel-mig-wire-1-2mm-5kg-welding" published_at: "2026-06-18T10:04:50+00:00" modified_at: "2026-06-18T10:05:24+00:00" url: "https://sglonline.co.uk/product/a18-sg2-g3si1-mild-steel-mig-wire-1-2mm-5kg-welding/" markdown_url: "https://sglonline.co.uk/product/a18-sg2-g3si1-mild-steel-mig-wire-1-2mm-5kg-welding.md" excerpt: "A18 SG2 (G3Si1) Mild Steel Mig Wire (1.2mm) 5kg Welding Features and Applications A copper coated solid wire suitable for single pass or multipass welding of unalloyed and low-alloyed carbon-manganese steels. Good mechanical properties at sub-zero temperatures down to -40ºC...." taxonomy_product_type: - "simple" taxonomy_product_cat: - "Mild Steel MIG Wire" --- [https://sglonline.co.uk/wp-content/uploads/2025/06/Welding-Consumables.jpeg](https://sglonline.co.uk/wp-content/uploads/2025/06/Welding-Consumables.jpeg) [Mild Steel MIG Wire](https://sglonline.co.uk/product-category/welding-consumables/mig-wire/mild-steel-mig-wire/) # A18 SG2 (G3Si1) Mild Steel Mig Wire (1.2mm) 5kg Welding Earn 20 points with this purchase £20.99£25.19 Exc VATInc VAT Collection or Next Day Delivery Available. Dispatches in: SKU: 3010200606-10200607Category: [Mild Steel MIG Wire](https://sglonline.co.uk/product-category/welding-consumables/mig-wire/mild-steel-mig-wire/) - [Description](#tab-description) - [Reviews (0)](#tab-reviews) ## A18 SG2 (G3Si1) Mild Steel Mig Wire (1.2mm) 5kg Welding **Features and Applications** A copper coated solid wire suitable for single pass or multipass welding of unalloyed and low-alloyed carbon-manganese steels. Good mechanical properties at sub-zero temperatures down to -40ºC. Precision layer wound for superior wire feeding characteristics. Typically used on boilers, industrial machinery, bridges, shipbuilding, automotive, rail, structural and engineering fabrications etc. Green wire is produced using virgin raw materials sourced from specialised steel mills, which ensures consistent reliability and quality. **Typical Base Materials** S185, S235, S275, S355 – Grade A, B, D, AH32 to DH36 – L210, L240, L290, L360, L240NB, L290NB, L360NB, L360QB, L240MB, L290MB, L360MB, L415MB – X42, X46, X52, X60 – P235T1, P235T2, P275T1 – P275T2, P355N – P235GH, P265GH, P295GH, P355GH – S275, S355, S420, S275M, S275ML, S355M, S355ML, S420M, S420ML* * Illustrative, not exhaustive list | Standards | | --- | | EN ISO 14341-A – G 42 3 C1 / G 42 4 M21 3Si1 | | AWS A5.18 – ER 70S-6 | | Chemical Composition % (Typical) | | | | | | | --- | --- | --- | --- | --- | --- | | C% | Si% | Mn% | P% | S% | Cu% | | 0.07 | 0.85 | 1.45 | <0.025 | <0.025 | <0.35 | | | | | | | | | Cr% | Ni% | Mo% | Al% | V% | Zr+Ti% | | <0.15 | <0.15 | <0.15 | <0.020 | <0.030 | <0.15 | | Mechanical Properties (Typical) | | | | --- | --- | --- | | Shielding Gas | C1 | M21 | | Tensile Strength | 540 MPa | 580 MPa | | Yield Strength | 440 MPa | 460 MPa | | Elongation | 30% | 26% | | Impact Strength | 70 J | 90 J | | Test Temperature | -30ºC | -40ºC | *Mechanical properties are approximate and may vary based on the heat, shielding gas, welding parameters and other factors.* | Welding Parameters | | | | --- | --- | --- | | Ømm | Current (A) | Voltage (V) | | 0.60 mm | 50-100 | 15-20 | | 0.80 mm | 60-180 | 18-22 | | 1.00 mm | 80-230 | 20-28 | **Shielding Gases** EN ISO 14175 – C1, M21 **Welding Positions** EN ISO 6947 – PA, PB, PC, PD, PE, PF, PG **Liability:** Whilst all reasonable efforts have been made to ensure the accuracy of the information contained, this information is subject to change without notice and can be only considered as suitable for general guidance. ## Reviews There are no reviews yet. 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