Description

SQ-7018 is a general purpose, low hydrogen electrode for welding 490MPa class high tensile steel. E7018 has a very good deposition rate, producing steady arc with low spatter and medium penetration.  

Key Feature

Improved coating integrity

Extreme bendability

60% less moisture pickup vs. competition

Reduction of arc starting porosity

Clear puddle and a smooth arc

DEPOSIT COMPOSITION(1)

	%C	%Mn	%Si	%P	%S	%Ni
Requirements - AWS E7018 H4R	0.15 max.	1.60 max.	0.75 max.	0.035 max.	0.035 max.	0.30 max.
Typical Results(3)	0.03-0.08	1.01-1.55	0.34-0.68	0.01-0.02	≤ 0.01	0.01-0.06
	%Cr	%Mo	%V	%Mn + Ni + Cr + Mo + V	Diffusible Hydrogen (mL/100g weld metal)
Requirements - AWS E7018 H4R	0.20 max.	0.30 max.	0.08 max.	1.75 max.	4.0 max.
Typical Results(3)	0.02-0.07	≤ 0.05	≤ 0.02	1.04-1.75	2-3

TYPICAL OPERATING PROCEDURES

Current (Amps)
Polarity(4)	3/32 in (2.4 mm)	1/8 in (3.2 mm)	5/32 in (4.0 mm)	3/16 in (4.8 mm)	7/32 in (5.6 mm)	1/4 in (6.4 mm)
DC+	70-110	90-160	130-210	180-300	250-330	300-400
AC	80-120	100-160	140-210	200-300	270-370	325-420

(1)Typical all weld metal. (2)Measured with 0.2% offset. (3)See test results disclaimer on pg. 18. (4)Preferred polarity is listed first

MECHANICAL PROPERTIES.

	Yield Strength	Tensile Strength	Elongation	Charpy V-Notch J (ft•lbf)
	MPa (ksi)	MPa (ksi)	%	-29°C (-20°F)
Requirements - AWS E7018	400 (58) min.	490 (70) min.	22 min.	27 (20) min.
Typical Results - As-Welded	430-510 (62-74)	510-605 (74-88)	25-37	121-332 (89-246)

* Extreme bendability apply to 3/32, 1/8 and 5/32 in. diameters.

 

 

Welding Positions

All, except vertical down

DIAMETERS / PACKAGING

 

Diameter		Length
in	(mm)	in (mm)
3/32	(2.4)	14 (350)
1/8	(3.2)	14 (350)
5/32	(4.0)	14 (350)
3/16	(4.8)	14 (350)
7/32	(5.6)	18 (450)
1/4	(6.4)	18 (450)

Conformances

AWS A5.1/A5.1M: 2004 ASME SFA-A5.1:

ABS:

Lloyd’s Register: DNV Grade:

GL:

BV Grade: CWB/CSA W48-06:

 

Typical Applications

Power generation

Petrochemical

Pressure vessels 

Pressure piping

 

 

Shijiazhuang shiqiao Electric welding Material co.,ltd

south shengli street shijiazhuang city hebei province China

Fax: 86-311-82265912

Contact: Alice (sales manager)

Mobile Wechat  Whatsapp : +8613673135771