Welding wire HS221

 

HS221 welding wire adopts Al-Mg-Si alloy formula and is made by continuous drawing-annealing process, which is suitable for MIG/TIG welding process. The surface of welding wire is chromium-free passivation treated to ensure conductivity and wire feeding stability. It complies with AWS A5.10 ER5356 standard and is widely used in high-precision fields such as rail transportation and pressure vessels.

 

 

 

• Wire feeding smoothness: diameter tolerance ±0.02mm, ovality ≤0.03mm
• Spatter control: short-circuit transition spatter rate ≤1.2% (MIG welding)
• Beautiful forming: weld excess height ≤1.5mm, surface roughness Ra≤2.5μm

 

• Corrosion resistance: passed NSS neutral salt spray test (720 hours without white rust)
• Resistance to thermal cracking: crack sensitivity index Pcm≤0.25%
• Low temperature performance: -40℃ impact toughness ≥34J

 

• Deposition speed: MIG welding deposition rate reaches 1.8kg/h (φ1.2mm welding wire)
• Post-weld cleaning: oxide generation is reduced by 40%, reducing grinding costs

 

 

Industry	Typical applications	Welding methods	Advantages
Automobile manufacturing	Aluminum alloy vehicle body frame	MIG	Welding deformation ≤ 0.5mm/m
Pressure vessels	Liquid hydrogen tank inner wall	TIG	Weld density reaches 10⁻⁹Pa・m³/s
Aerospace	Aluminum alloy skin repair	TIG	Fatigue strength ≥ 190MPa
Marine engineering	Offshore platform structural parts	MIG	Seawater corrosion resistance life increased to 25 years

 

 

Element	AWS A5.10 Standard	Measured Value	Function Analysis
Al	del	92.3%	Matrix elements ensure lightness
Mg	4.5-5.5%	5.2%	Strengthen weld strength and inhibit grain coarsening
Si	0.4-0.8%	0.65%	Improve fluidity and reduce pores
Mn	≤0.15%	0.12%	Deoxidize and desulfurize to improve toughness
Ti	0.05-0.20%	0.15%	Refine grains and control pores

 

 

Test Item	Standard Requirement	Measured Value
Tensile strength	≥290MPa	335MPa
Yield strength	≥170MPa	215MPa
Elongation	≥12%	16.8%

 

 

 

Wire diameter	Current range	Voltage range	Wire feed speed	Shielding gas
φ1.0mm	80-160A	18-24V	3-8m/min	99.99%Ar
φ1.2mm	120-220A	20-26V	2-6m/min	98%Ar+2%He

 

 

Groove design:

• Thin plate (≤3mm): I-type groove, gap 1-2mm
• Medium and thick plate (3-12mm): V-type groove, angle 60°±5°

Preheating control: When the wall thickness is greater than 15mm, preheat to 100-150℃ (infrared temperature measurement)
Interlayer temperature: ≤100℃, use water-cooled copper pad to control heat input

 

 

1. Wire management

• Storage conditions: temperature 20±5℃, humidity ≤50% (monitored by desiccant and humidity card)
• After unpacking: use within 24 hours, and seal and refrigerate the remaining wire (4℃)

2. Equipment requirements

• MIG welding machine: digital waveform control welding machine (such as Lincoln Power Wave 455) is recommended
• Wire feeding system: dual active wheel wire feeder, pressure setting 3-5bar

 

 

 

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