KYA 0.9mm ER70S-6 MIG Welding Wire is a copper-coated mild steel solid welding wire for gas-shielded arc welding. The current product specification lists 100% CO2, Ar + 5% CO2 and Ar + 2% O2 shielding gas options.
For the deposited weld metal data listed on this page, the tensile strength is 545 MPa, yield strength is 452 MPa, elongation is 29%, and impact energy is 91 J at -30°C under CO2 shielding gas.
KYA lists this ER70S-6 / ER50-6 welding wire for welding components around the 500MPa strength level, including coal mine machinery, ships, engineering machinery, bridges, pressure vessels, building construction, petrochemical structures, power stations and boilers.
Copper-coated mild steel solid welding wire
0.9mm product size with additional 0.8mm, 1.0mm, 1.2mm and 1.6mm diameter options listed
545 MPa listed tensile strength of deposited weld metal
Stable arc and minimal spatter as described on the current KYA page
All-position welding: F, H, OH and V
Low hydrogen and nitrogen content as described on the current product page
Designed for 100% CO2 and listed argon-based mixed shielding gases
5kg, 15kg and 20kg spool options
| Attribute | Details |
| Product | 0.9mm MIG Welding Wire for Strength 500MPa ER70S-6 |
| Model | ER70S-6 / ER50-6 |
| Material | Copper-Coated Mild Steel |
| Available Diameter | 0.8mm, 0.9mm, 1.0mm, 1.2mm, 1.6mm |
| Spool Weight | 5kg, 15kg, 20kg |
| Welding Position | All Positions (F, H, OH, V) |
| Shielding Gas | 100% CO2, Ar + 5% CO2, Ar + 2% O2 |
| Packaging / Container Loading | 24 tons per 1x20' GP FCL |
ER70S-6 is widely used as the AWS classification designation for copper-coated mild steel solid wire used in GMAW/MIG welding. Major welding consumable manufacturers also identify ER70S-6 products under AWS A5.18.
The current KYA product page identifies this product as ER70S-6 / ER50-6. The classification information above is provided as technical context and does not add any certification or approval claim beyond the information stated by KYA.
| C | Mn | Si | P | S | Ni | Cr | Cu | V |
| 0.08 | 1.51 | 0.89 | 0.015 | 0.013 | 0.016 | 0.021 | 0.18 | 0.003 |
The following mechanical-property data is listed for deposited weld metal using CO2 shielding gas.
| Tensile Strength Rm (MPa) | Yield Strength Rel / Rp0.2 (MPa) | Elongation (%) | Impact Energy (J) | Test Temperature | Shielding Gas |
| 545 | 452 | 29 | 91 | -30°C | CO2 |
KYA lists the following welding-current and voltage ranges as reference parameters. Actual settings should be matched to the wire diameter, base material, joint, welding position, shielding gas and welding equipment.
| Welding Wire Diameter | Welding Current (A) | Welding Voltage (V) | Reference Current (A) |
| 0.8mm | 50–120 | 15–22 | 100 |
| 0.9mm | 70–180 | 18–24 | 150 |
| 1.0mm | 70–180 | 18–24 | 150 |
| 1.2mm | 80–350 | 18–34 | 280 |
| 1.6mm | 140–500 | 20–42 | 350 |
For the 0.9mm diameter specifically, the current KYA table lists a welding current range of 70–180 A, a welding voltage range of 18–24 V and a reference current of 150 A.
These are reference values rather than a universal welding procedure. Final settings should be adjusted for the actual base metal thickness, joint configuration, welding position, shielding gas, wire feed speed and equipment condition.
The current KYA specification lists three shielding-gas options for ER70S-6 MIG welding wire:
100% CO2
Argon + 5% CO2
Argon + 2% O2
Shielding gas affects arc characteristics, metal transfer and welding parameters. The mechanical-property values shown above are specifically listed with CO2 as the shielding gas.
The current KYA product description characterizes ER70S-6 as having stable wire feeding and arc performance, fast melting, reduced welding spatter and good weld bead formation.
KYA also describes the wire as suitable for all-position welding, with low hydrogen and nitrogen content, low sensitivity to weld-metal porosity and reduced post-weld deformation.
| Available Diameters | 0.8mm, 0.9mm, 1.0mm, 1.2mm, 1.6mm |
| Spool Weights | 5kg, 15kg, 20kg |
| Container Loading | 24 tons per 1x20' GP FCL |
KYA lists ER70S-6 MIG Welding Wire for welding 500MPa-strength components and steel structures across multiple industrial applications.
Coal mine machinery
Shipbuilding
Engineering machinery
Bridge construction
Pressure vessels
Building construction
Petrochemical structures
Power stations
Boilers
The current product page describes ER70S-6 as suitable for thin, medium and thick plate welding. KYA also lists low welding cost, high productivity and relatively low electricity consumption among the product features.
Select the wire diameter, welding current, voltage and shielding gas according to the actual plate thickness, joint design and welding procedure.
The current KYA page states that customers can contact KYA Fasteners to arrange a sample to evaluate the welding wire.
KYA also states that bulk orders and customized welding-wire solutions are available, including tailored diameters and spool sizes for specific project requirements.
The current product page states that KYA Fasteners has more than 20 years of experience and describes its production as SGS-certified.
The page also states that KYA serves customers in more than 50 countries and ships worldwide from Qingdao port within 20–30 days.
20+ years of experience as stated on the current KYA page
SGS-certified production as stated on the current page
Exports to 50+ countries
Worldwide shipping from Qingdao port within 20–30 days
Customized diameters and spool sizes
KYA lists this wire for welding components around the 500MPa strength level, including coal mine machinery, ships, engineering machinery, bridges, pressure vessels and structural applications.
The current KYA mechanical-property table lists a tensile strength of 545 MPa under CO2 shielding gas.
The listed yield strength Rel / Rp0.2 is 452 MPa.
The listed impact energy is 91 J at -30°C under CO2 shielding gas.
For 0.9mm wire, the current KYA table lists 70–180 A welding current, 18–24 V welding voltage and a 150 A reference current.
The current KYA specification lists 100% CO2, Ar + 5% CO2 and Ar + 2% O2.
The current KYA page lists all-position welding, including F, H, OH and V positions.
The current product page lists 0.8mm, 0.9mm, 1.0mm, 1.2mm and 1.6mm diameters.
The listed spool options are 5kg, 15kg and 20kg.
The current KYA specification lists 24 tons per 1x20' GP FCL.
Yes. KYA identifies this product as copper-coated mild steel welding wire.
Yes. 100% CO2 is one of the shielding gases specifically listed on the current KYA product page.
Yes. The current KYA page states that customers can contact KYA Fasteners to arrange a sample to test the wire's quality.
Yes. The current page states that customized welding solutions, including tailored diameters and spool sizes, are available for specific project requirements.
Yes. The current product page describes KYA's production as SGS-certified.
The current page states that KYA ships worldwide from Qingdao port within 20–30 days.
Other MIG, gas-shielded and welding wire products can be viewed in the KYA Welding Wire category.
