Introduction and use of ER4043 aluminum welding wire

The ER4043 aluminum welding wire is a demanded product from the UAE customer. The required wire diameter is 1.2mm, which is the conventional aluminum wire size. This article introduces the ER4043 aluminum welding wire to the needs of UAE customers.

1.ER4043 aluminum welding wire introduction

ER4043 aluminum alloy has the characteristics of low melting point, good fluidity and good corrosion resistance. It is very beneficial to avoid welding cracks and is specially used as welding material. As a kind of versatile aluminum-silicon welding wire, ER4043 has good resistance to thermal cracking on deposited metal and can also guarantee certain mechanical ability.

2. ER4043 aluminum welding wire performance characteristics

ER4043 is a silicon-containing 5% aluminum-silicon alloy wire, also known as S311. It has good fluidity and is used for welding forged and cast materials because of its weak sensitivity to hot cracks. It is also used as a filling material for argon arc welding and brazing of aluminum alloy workpieces and castings other than aluminum-magnesium alloys. It is easy to form brittle Mg2Si in the weld during welding, which reduces the plasticity and corrosion resistance of the joint, so the wire is generally not used for welding aluminum-magnesium alloy. The welding is beautiful and the sightseeing is bright, the arc is stable, and the splash is small, but the color is different from the base material after the anodizing treatment.

The melting temperature of ER4043 ranges from 1065-1170oF, the color after anodization is off-white, and the low tensile strength is 186MP.

3.The chemical composition of the ER4043 aluminum welding wire is as follows:

Composition (%)	Al	Si	Fe	Cu	Mn	Mg	Zn	Ti
ER4043	92.5-94	4.50-6.00	≤0.80	≤0.30	≤0.05	≤0.05	≤0.10	≤0.20

4. ER4043 aluminum welding wire welding method and use

Welding method of ER4043: AC argon arc welding, pure argon gas protection. It is necessary to clean the workpiece weld before welding, and avoid air, weldment and welding wire damp.

Use of ER4043 aluminum welding wire: used for welding of 6601 series aluminum alloy, 3XXX series and 2XXX series aluminum alloy and cast aluminum. Widely used in ships, locomotives, chemicals, food, sports equipment, molds, furniture, containers, containers.

The above is an introduction to the performance characteristics, chemical composition and use of ER4043 aluminum welding wire. I believe that everyone has a certain understanding of ER4043 aluminum welding wire. It is widely used in our lives and it is also indispensable. At present, the demand for aluminum wire of our company is very large. In terms of products, some manufacturers in the market may have lower prices, but generally there will be some problems in the use process. Our company's aim is to insist on using quality to speak, to provide quality assurance and quality after-sales service.

Eternal Bliss Alloy Casting & Forging Co, Ltd.

Technical Dept.

E-mail: cast@ebcastings.com

what’s app: 0086-13093023772

Alyssa

Wire Welding wire Aluminum welding wire Silicon welding wire ER4043 welding wire

About Introduction of 40Cr Bolt

1. Introduction

40Cr is the standard steel grade of China GB, and 40Cr steel is one of the most widely used steels in machinery manufacturing. After quenching and tempering treatment, it has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. The hardenability of steel is good, it can be hardened to 28~60mm when water quenching, and can be hardened to 15~40mm when oil quenching. This steel is also suitable for cyanidation and high frequency quenching in addition to quenching and tempering. The cutting performance is good. When the hardness is 174~229HB, the relative machinability is 60%. The steel is suitable for making medium plastic molds.

Composition(%)	C	Si	Mn	P	S	Ni	Cr	Mo
40Cr	0.37-0.44	0.17-0.37	0.50-0.80	≤0.035	≤0.035	≤0.30	0.80-1.10	≤0.10

Bolt: Mechanical parts, cylindrical threaded fasteners with nuts. A type of fastener consisting of a head and a screw (a cylinder with an external thread) is required to be fitted with a nut for fastening the two parts with through holes. This type of connection is called a bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.

At present, the standard parts on the market mainly include carbon steel, stainless steel and copper.

2. Classification

According to the way of connection, it is divided into ordinary and reamed holes. According to the shape of the head: there are hexagonal heads, round heads, square heads, countersunk heads, etc. The hexagonal head is the most commonly used. Generally, the countersunk head is used where the connection is required.

Ordinary bolts can be divided into three grades A, B, and C according to the production precision. Grades A and B are refined bolts, and grade C is thick bolts. For the connection bolts for steel structures, unless otherwise specified, they are generally ordinary C-class bolts. There are differences in the methods of different grades. Generally, the corresponding processing methods are as follows: The bolts of 1A and B bolts are machined by lathe, the surface is smooth and the size is accurate. The material performance grade is 8.8, the production and installation are complicated, and the price is relatively high. High, rarely used; Class 2C bolts are made of unprocessed round steel and are not accurate enough to have a material performance rating of 4.6 or 4.8. The deformation is large when the shear connection is made, but the installation is convenient, the production cost is low, and it is mostly used for the temporary connection of the tensile connection or the installation.

3. Use

There are many names for bolts. Everyone's name may be different. Some people call them screws, some are called bolts, and some people call them fasteners. Although there are so many names, the meanings are the same, they are bolts. Bolts are a general term for fasteners. Bolts are tools that use the physics and mathematical principles of the circular rotation and friction of the bevel of an object to progressively fasten the components of the object.

4. Level meaning

According to the relevant standards, the performance grades of carbon steel and alloy steel bolts are more than 10 grades of 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, among which the bolts of grade 8.8 and above are made of low carbon alloy steel or medium. Carbon steel is heat treated (quenched, tempered), commonly known as high-strength bolts, and the rest is commonly referred to as ordinary bolts. The bolt performance grade label is composed of two parts, which represent the nominal tensile strength value and the yield ratio of the bolt material. Stainless steel bolts are classified into A1-50, A1-70, A1-80, A2-50, A2-70, A2-80, A3-50, A3-70, A3-80, A4-50 according to the class of steel performance. A4-70, A4-80, A5-50, A5-70, A5-80, C1-50, C1-70, C1-110, C4-50, C4-70, C3-80, F1-45, F1- 60. The first letter and number represent the group of stainless steel, and the second and third digits represent 1/10 of the tensile strength.

5. Common surface treatment methods for bolts

Bolts generally need to be surface treated. There are many types of surface treatments for bolts. Generally, blue, electroplated, oxidized, phosphatized, non-electrolytic zinc sheet coatings are commonly used. Among them, plating is the most extensive. For fasteners, not only is it required to have a certain degree of corrosion resistance, but also the interchangeability of the threads must be ensured, which can also be called screwing.

Comparison: The lowest cost of blue is the worst. The galvanizing cost is higher and the anti-corrosion effect is better. Chrome plating is costly but best preserved. The blue surface is blue, the galvanized surface is silver-gray, and the chrome finish is reflective.

6. Inspection of bolts

For large-volume use bolts, the relevant inspections are carried out in the warehouse.

Test the hardness of the bolt ‘bolt torsion torque; do the corresponding salt spray test; the appearance should be no obvious defects. Threads can be tested with standard pass gauges. For other inspection items, see the general specifications for common bolt threads and screws.

7. Thread size and length calculation instructions

The thread size has a distinction between a preferred specification and a non-preferred specification. In general, the second series of non-preferred threads are not used, such as M14 bolts are not preferred. For the interchangeability of bolts, not all sizes of bolts are available. There are also series of bolt lengths, which are divided into full thread and non-full thread. The length of the nut 0.3d should be exposed when calculating the bolt length.

8.40Cr bolts sent to Finland

Just in June, we received a purchase order for the Finnish customer 40Cr bolts, and soon we arranged the production according to the customer's drawings. Below is a picture of the bolt we sent to Finland.