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SG3

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AWS A5.18 ER70S-6
ISO 14341-A-G38 3C1 4Si1
G42 4M21 4Si1
GB/T 8110 G49A3UC1S6
G49A4UM21S6

Applications: 

It can be used in the welding of carbon steel and low alloy steel in the corresponding strength grade, which can be used in engineering machinery, shipbuilding, vehicle manufacturing, petrochemical and other industries, especially in the locomotive and rolling stock manufacturing industry.

 Characteristics: 

Wire of THQ-50CG4 is Rm 500MPa level carbon steel wire with shield gas of CO2 or M21. The welding spatter is small, and it has beautiful shape, high cladding efficiency. It can be used for all position.

 Attention:

1. The rust, oil, water and other impurities of the weld area must be removed before welding.

2. The mechanical properties of all weld metal be decided by heat input, normally the small heat input will better than larger one.

 Chemical Composition of Wire:          (Wt. %)

Items

C

Mn

Si

S

P

Ni

Requirements

0.06-0.14

1.60-1.85

0.80-1.15

≤0.025

≤0.025

≤0.15

Items

Cr

Mo

V

Cu

Al

Ti+Zr

Requirements

≤0.15

≤0.15

≤0.03

≤0.35

≤0.02

≤0.15

 Mechanical Properties of All Weld Metal:

Items

Shield gas

Rm/MPa

Rel/Rp0.2 /MPa

A/%

KV2 /J

Requirements

C1

520-600

≥420

≥22

≥47(-30℃)

Typical Results

C1

560

440

30

58

Requirements

M21

530-640

≥420

≥22

≥47(-40℃)

Typical Results

M21

580

483

28

88

 X-ray Radiographic Inspection:

Level Ⅱ

 Typical Operating Procedures: (DC +)

Diameter（mm）

0.8

1.0

1.2

1.6

Current（A）

50-180

70-230

80-350

120-500

 EU Certification:

Certification Authority

CPD-CE

DB-AG

VD-TÜV

Grade

ISO14341-A-G38 3 C1 4Si1/G42 4M21 4Si1

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