Gas shielded arc welding
Steel structures commonly use GMAW welding after assembly. Gas shielded arc welding regards the gas as a medium and takes the protection for the arc and welding area. Gas shielded arc welding enjoys good visibility to arc and weld pool. In addition, GMAW seldom has slag and obvious welding deformation.It is quite suitable for mechanized welding with spatial location.
Selection Guide for gas welding process parameters
A1 Wire diameter
Generally, the wire can be selected according to Table A1
| Base metal thickness | ≤4 | >4 |
| Wire diameter | 0.5-1.2 | 1.0-1.6 |
Table A1
A2 Wire elongation
A2.1 The wire elongation relates to the wire diameter, the welding current and the welding voltage
A2.2 During the welding process, the distance from the tip to the base material is generally as 10-15 times as the wire diameter.
A3 Welding current
A3.1 Stick up the principle that base materials are in well welding penetration, welding current should be accurately selected in accordance with the thickness of base materials, joint type and the wire diameter.
A3.2 The range of welding current in common use with variety of wire diameters shown in Table A2
| Wire diameter | 0.5 | 0.6 | 0.8 | 1.0 | 1.2 | 1.6 |
| Welding currents | 30-70 | 49-90 | 50-120 | 70-180 | 90-350 | 150-500 |
Table A2
Automatic Submerged Arc Welding
After H type steel structure being assembly, automatic submerged arc welding (gantry welding) is commonly taken into welding process. The automatic submerged arc welding is a kind of method named electric arc welding that the arc burning would be occurred in flux layers. Automatic submerged arc welding has outstanding advantages, there are high weld quality and brilliant protective effect of slag isolated from the air. Furthermore, the welding parameters can be automatically adjusted to maintain stability with stable welded composition and remarkable mechanical properties.
The selection of flux and wire
Mild steel in welding process can choose the flux with high manganese and silicon (HJ431) and work in with the wire in the type of H08MnA. While it could also use type flux with low manganese or no manganese (such as HJ130, HJ230, etc.) and match with the type of H08MnA or H10Mn2 wire.
1,Welding with high strength and low alloy steel can choose the flux with fierce silicon (such as HJ350) or low manganese silicon (such as HJ250) and work in with the wire in appropriate high strength and low alloy steel (such as: H08MnMoA, H08Mn2MoA etc.)
2,Steel in heat resistant, low manganese and corrosion preventive can select flux with silicon or low silicon and with corresponding alloy steel wire during the welding process.
3,The high alloy steels such as the ferrite, the austenitic commonly choose the high alkalinity agglomerated flux or the solder bonding in order to reduce the burning loss and penetrated alloy of alloy elements.
| Advantages | 1. design according to customers' requirements |
| 2. manufacture under complete quality control system---ISO9001 |
| 3. installation with instruction of experienced engineers |
| 4. easy to assemble and dismantle |
| 5. Environmental protection material: can be used for several times and can be recycled |
| 6. shorter construction period, longer using time |
| 7. high strength and stiffness, high weight bearing. |
| 8. sound insulation and heat insulation; antisepsis and damp proofing; waterproof and aseismatic |
Company Profile:
Foshan Shengbang Steel Structure Co., Ltd.Possesses professional large-scale steel structure production equipments and the automatic spraying production line, so we can satisfy the different customers demand.We takes "build your future" as mission and takes company growth as premise.The company has trained many high quality marketing personnel, professional technician and construction workers.We take the customers' demand as the guidances, then provide reasonable, scientific and effective solution for customers.We regard practical growth, innovation and group solidarity as our company spirit, so that we can offer all-round service to customers.
Website:HTTP://www.Sbshouses.COM
HTTP://chinaprefabhouse.En.Made-in-China.Com
FOSHAN SHENGBANG STEEL STRUCTURE Co., Ltd
Add:Pingtang Industrial Park, Shipeng Village, Shishan Town, Nanhai District, Foshan, Guangdong Province, China
Tel:0086-757-63323396 Fax:0086-757-81196682
Foshan Shengbang Steel Structure Co., Ltd. (for short "SBS") is a fast developing enterprises integrating marketing, design, development, manufacturing and construction. It has been approved and certified by international ISO9001: 2008 quality management system, and SGS factory system. We have trained many highly qualified marketing and technical personnel as well on-site construction team during recent years' fast development. Being customer demand-oriented, SBS provides a full range of services with rational, scientific and effective solutions, as a practical, progressive, innovative & solidarity company.
Our company prefabricated house is a new type environmental friendly product that adopts steel structure as frames, employs various plates and panels as surrounding protection system, uses high strength bolts as component connection. The prefabricated house is mainly used as modular house, office, cleaning workshop, cold storage room, wide span workshop, warehouse, exhibition hall, stadiums, hangars, steel-structure supermarkets, high-rise steel constructions, logistics center, container house and so on. Our house has been sold well to Middle East, Africa, Southeast Asia, South America and other more than 30 countries and areas.
Foshan Shengbang Steel Structure Co., Ltd. Possesses professional large-scale steel structure production equipments and the automatic spraying production line, so we can satisfy the different customers demand. We takes "build your future" as mission and takes company growth as premise. The company has trained many high quality marketing personnel, professional technician and construction workers. We take the customers' demand as the guidances, then provide reasonable, scientific and effective solution for customers. We regard practical growth, innovation and group solidarity as our company spirit, so that we can offer all-round service to customers.
Foshan Shengbang Steel Structure Co., Ltd. Will cooperate sincerely with the customers and build better future under the principle of win-win cooperation.
