Featured Products
high-performance agglomerated calcium-silicate flux-SJ-301
SJ301 submerged arc welding flux is a high-performance agglomerated calcium-silicate flux designed for efficient welding of low-carbon and low-alloy steels. With a neutral basicity index of 1.0, it delivers stable arc performance, effortless slag detachment, and superior weld bead aesthetics, making it ideal for high-speed applications in industries like pipeline construction, bridge building, and machinery fabrication. Certified under AWS A5.17 F6A0-EL8 and F7A2-EM12K standards, this flux minimizes porosity and ensures strong mechanical properties, such as tensile strength up to 670 MPa when paired with EM12K wire. As a reliable choice from Chinese manufacturers, SJ301 enhances productivity by supporting AC/DC currents and multi-layer welding without interface defects. Perfect for structural projects requiring durability and cost-efficiency.
Welding flux GJ-101
GJ-101 submerged arc welding flux is a high-alkalinity sintered flux, specially designed for industrial welding applications to provide efficient and high-quality welding results. This fluoride-based flux has excellent slag removal performance, low impurity content (such as phosphorus and sulfur), and offers superior mechanical properties for carbon steel, low-alloy steel, and high-strength structural components. It is suitable for single-layer and multi-layer submerged arc welding (SAW), ensuring stable arc combustion, a beautiful weld appearance, and improving production efficiency in the manufacturing of pressure vessels, pipelines, and heavy machinery.
Submerged Arc Welding flux SJ-501 A
Submerged Arc Welding Flux SJ-501 A is a high-performance agglomerated aluminum-rutile type acid sintered flux with a basicity index of approximately 0.5-0.93 and a particle size of 10-60 mesh (about 0.3-2.0mm). It is specially designed for low-alloy steels and high-strength steels (such as ASTM A514, A517), supporting single-wire or multi-wire high-speed welding (up to 100m/h), and is suitable for applications such as small cylinders, LPG tanks, pressure vessels, and shipbuilding. This flux complies with the standards of EN760 SA AR 1 88 AC H5 and AWS A5.17/5.23 F7A0-EL12, providing stable arc, excellent slag detachability, smooth weld seams, and resistance to cracks and pores. It is not sensitive to surface rust and scale, ensuring efficient welding quality and excellent mechanical properties, such as high impact toughness and tensile strength.
Submerged Arc Welding flux GJ-101
The Submerged Welding flux SJ-101 produced by GUJIN® is the perfect choice for all your industrial needs. We are a reliable and trustworthy manufacturer that offers high quality products at favorable prices. As a wholesale supplier of SJ-101 fluxes, we are committed to providing you with the best products and best customer service.
ER70S-6 Stainless Steel
GUJIN® is a professional ER70S-6 Stainless Steel manufacturers and suppliers in China. For Stainless steel welding wire, everyone has different special concerns about it, and what we do is to maximize the product requirements of each customer, so the quality of our Stainless steel welding wire has been well received by many customers and enjoyed a good reputation in many countries. GUJIN® Stainless steel welding wire have characteristic design & practical performance & competitive price, for more information on the Stainless steel welding wire, please feel free to contact us.
Submerged Welding flux SJ-101
The Submerged Welding flux SJ-101 produced by GUJIN® is the perfect choice for all your industrial needs. We are a reliable and trustworthy manufacturer that offers high quality products at favorable prices. As a wholesale supplier of SJ-101 fluxes, we are committed to providing you with the best products and best customer service.
Welding Wire EM13K
As the professional manufacture, GUJIN® would like to provide you Submerged Arc Welding Wire EM13K. For Submerged arc welding wire, everyone has different special concerns about it, and what we do is to maximize the product requirements of each customer, so the quality of our Submerged arc welding wire has been well received by many customers and enjoyed a good reputation in many countries. GUJIN® Submerged arc welding wire have characteristic design & practical performance & competitive price, for more information on the Submerged arc welding wire, please feel free to contact us.
ER309L Stainless Steel
GUJIN® warmly welcome you to wholesale ER309L Stainless Steel from our factory. For Stainless steel welding wire, everyone has different special concerns about it, and what we do is to maximize the product requirements of each customer, so the quality of our Stainless steel welding wire has been well received by many customers and enjoyed a good reputation in many countries. GUJIN® Stainless steel welding wire have characteristic design & practical performance & competitive price, for more information on the Stainless steel welding wire, please feel free to contact us.
Welding flux SJ601
As the professional manufacture, GUJIN® would like to provide you Welding flux SJ601. And GUJIN® will offer you the best after-sale service and timely delivery.
Welding flux SJ301
For agglomerated submerged arc welding flux SJ-301, everyone has different special concerns about it, and what we do is to maximize the product requirements of each customer, so the quality of our Welding flux SJ301 has been well received by many customers and enjoyed a good reputation in many countries. The GUJIN ® SJ-301 has a better quality level, better performance for use, and a below-market price, for more information on the SJ-301, please feel free to contact us.
Welding flux SJ101G
GUJIN® is a professional Welding flux SJ101G manufacturers and suppliers in China. If you interested in Submerged Arc welding flux SJ-101G products, please contact with us. We follow the quality of rest assured that the price of conscience, dedicated service.
Welding flux SJ414
You can rest assured to buy customized Welding flux SJ414 from us. We look forward to cooperating with you, if you want to know more, you can consult us now, we will reply to you in time!
Welcome to our website! For inquiries about our products or pricelist, please leave your email to us and we will be in touch within 24 hours.
high-performance agglomerated calcium-silicate flux-SJ-301
Submerged Arc Welding flux SJ-501 A
ER70S-6 Stainless Steel
Aluminum Alloy Welding Wire
Submerged Arc Welding Wire EH14
ER308L Stainless Steel
Welding flux SJ501
Welding flux SJ102
News
The Hidden Factor: Why Flux Grain Size (Mesh) Matters
When selecting a Submerged Arc Welding (SAW) flux, most engineers focus immediately on Basicity Index or alloy content. However, the physical grain size (Mesh Size) of the flux plays a surprisingly critical role in the welding process. At Jinan Gujin Welding Materials Co., Ltd., we offer fluxes in various mesh ranges (typically 10-60 mesh or 8-40 mesh). But why do we offer different sizes? And which one is right for your project?
Unlocking the Power of SJ101: The "Workhorse" of Submerged Arc Welding
In the welding consumables market, few products are as legendary as SJ101. It is often referred to as the "Swiss Army Knife" of agglomerated fluxes. But what makes this specific formulation so popular among fabrication shops and project owners worldwide? As the General Manager of Jinan Gujin Welding Materials Co., Ltd., I have seen our SJ101 used in everything from high-pressure boilers to massive offshore wind towers. Today, I want to break down the technical reasons why SJ101 should be your go-to choice for structural steel.
Troubleshooting Porosity in Submerged Arc Welding: Why It Happens and How to Fix It
There is nothing more frustrating in heavy fabrication than finishing a long longitudinal seam, only to fail the Radiographic Testing (RT) or Ultrasonic Testing (UT) due to porosity. Porosity—trapped gas bubbles in the solidified weld metal—weakens the joint and leads to costly rework. As the General Manager of Jinan Gujin Welding Materials Co., Ltd., I have visited countless factories. In 80% of cases, porosity is not caused by the machine, but by process and consumable management. Here is our technical guide to identifying the root causes and eliminating porosity in Submerged Arc Welding (SAW).
Agglomerated vs Fused Flux: How to Choose the Right SAW Flux for Your Project? | Jinan Gujin
At Jinan Gujin Welding Materials Co., Ltd., we manufacture premium grades of both types. Whether you need the robust reliability of Fused Flux or the metallurgical precision of Agglomerated Flux, we have the solution.
SJ301 is the preferred flux for LSAW steel pipe production.
SJ301 is a silicon-calcium neutral sintered flux (complying with F4A0-H08A in GB/T 12470 standard or AWS A5.17 F6A0-EL12), widely used in longitudinal submerged arc welding (LSAW) for the production of large-diameter and high-strength steel pipes (such as API 5L X70 and X80 pipeline steels). The following is a detailed application description of it in the LSAW process:
Can submerged arc welding fluxes An-60 and HJ431 replace each other?
The most direct domestic equivalent model of AN-60 is HJ431. HJ431 is one of the most widely used and highest-yielding smelting fluxes in China, and its characteristics are highly similar to those of AN-60.
