Weld Star CrMo5 TIG Filler Wire - 5% Cr / 0.5% Mo - 5kg (ER 80S-B6) - 1.6mm to 3.2mm Dia.
Price Promise

Found it cheaper? We will match it.
Price Match is available on products showing this message, including this Weld Star one. Send us the competitor's link and your delivery postcode, and we will confirm the matched price before you order.
- 1Send us the competitor's link
- 2Add your delivery postcode
- 3We confirm the price before you order
Identical new products from established UK retailers, total price including VAT and delivery, UK mainland only. Read the full terms
- Material: Low alloy copper-coated wire with 5% Cr and 0.5% Mo content
- Pack Size: 5 Kg
- Rod Diameter: 1.6mm – 3.2mm
- AWS Code: ER 80S-B6

Weld Star – CrMo5 TIG Wire is a low alloy, copper-coated wire designed with 5% Chromium (Cr) and 0.5% Molybdenum (Mo) content. This wire is specifically formulated for welding heat-resistant steels and offers both high strength and corrosion resistance, especially in environments with hot hydrogen gas.
Features and Benefits
- Heat Resistant: Designed for welding heat-resistant steels, making it ideal for high-temperature applications.
- Corrosion Resistant: Offers high resistance to corrosion, particularly in challenging environments.
- High Strength: Provides strong welds that can withstand demanding conditions.
- Quality Production: Made with virgin raw materials sourced from specialized steel mills, ensuring consistent quality and reliability.
Common Applications
- Power Plants: Used in pressure piping in steam power generating plants.
- Boilers and Heat Exchangers: Ideal for welding boiler and heat exchanger tubes.
- Oil Refineries: Suitable for applications in oil refineries where high-temperature resistance is required.
- Chemical and Petrochemical Industries: Used in various applications in the chemical and petrochemical sectors.
Typical Base Materials
X12CrMo5, GX12CrMo5, A213, A217:C5, A355:P5, GS 12CrMo19 5 (Illustrative, not exhaustive list).
| EN ISO21952-A – W CrMo5Si |
| AWS A5 28 – ER 80S-B6 |
| C% | Si% | Mn% | P% | S% | Cu% |
| 0.07 | 0.45 | 0.60 | <0.012 | <0.015 | <0.25 |
| Cr% | Ni% | Mo% | Al% | V% | Ti% |
| 5.70 | <0.20 | 0.60 | <0.020 | <0.030 | <0.010 |
| Tensile Strength | 660 MPa |
| Yield Strength | 560 MPa |
| Elongation | 22% |
| Impact Strength | 180 J |
| Test Temperature | +20 °C |
Mechanical properties are approximate and may vary based on the heat, shielding gas, welding parameters and other factors.
Shielding Gases
EN ISO 14175 – TIG: I1 (Argon)
Welding Positions
EN ISO 6947 – PA, PB, PC, PD, PE, PF
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.
| Brand | Weld Star |
| Weight | 5kg |
| Diameter | 1.6mm · |
| AWS Classification | ER 80S-B6 |
| Material Type | High Strength Steel (ER80S+) |
| TIG Rod Diameter | 1.6 mm, 2.4 mm, 3.2 mm |
| TIG Rod Weight | 5 kg |
| SKU | Weight | Diameter | Stock Status | |
|---|---|---|---|---|
| 3010300404 | 5kg | 1 6mm | In Stock | £62.67 ex VAT £75.20 inc VAT |
| 3010300406 | 5kg | 2 4mm | In Stock | £62.67 ex VAT £75.20 inc VAT |
| 3010300407 | 5kg | 3 2mm | In Stock | £62.67 ex VAT £75.20 inc VAT |
Datasheet
Download PDFA carriage charge is applied to orders, for standard 1-2 day shipments to mainland destinations within the United Kingdom. Other destinations and premium services are available but subject to additional freight charges.
Weld Star CrMo5 TIG Filler Wire - 5% Cr / 0.5% Mo - 5kg (ER 80S-B6) - 1.6mm to 3.2mm Dia. Get in touch
Have a question about this product? Our team of welding experts are here to help.
Visit Us
12 Mary Seacole Road
The Millfields
Plymouth, Devon
PL1 3JY














Reviews
There are no reviews yet