Mild Alloy Steel Wire, Low Alloy Steel Wire, Low Alloy Electrodes, TIG Welding, Thane, India

Mild Alloy Steel Wire, Low Alloy Steel Wire, Low Alloy Electrodes, Mild & Low Alloy Steel Wires, Thane, India

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Mild & Low Alloy Steel Wire

Mild & Low Alloy Steel Wires featured on this page :

Click here for: Suggestions for Welding Mild & Low Alloy Steel

 

 

 

 

 

Suggestions for Welding Mild & Low Alloy Steel          back to top

Mild steels are used for general construction - for bridges, platforms, transportation equipment, and building construction for example. The consumables for this type of welding are generally carbon-manganese type alloys, with carbon below .20%, manganese between 0.5% and 1.5%, and tensile strength 05 50,000 psi to 75,000 psi.

Low alloy steels are used for higher strengths and service environments of high and low temperatures. They contain carbon, manganese, chromium, molybdenum, and nickel - and in some specific types vanadium and copper appear as alloying elements. Low alloy steels with chromium and molybdenum are meant for moderately high temperature applications, since they have high creep resistance. For still higher temperatures, ferritic and martensitic stainless steels are used.

For low temperatures tp -50 degrees F, carbon and manganese steels are used. The consumables for welding these steels are:

 

TIG Welding

In TIG welding, the arc is struck between the work piece and the non-consumable electrode like thoriated tungsten for welding of ferrous materials and zirconiated tungsten for aluminum. The consumable wire is melted in the arc atmosphere and the inert gases like argon or helium or their mixture are used as shielded gases. TIG is extremely suitable for joining thin sheets and tubes, and for making root pass welding in pipes, since the heat input in this process is minimal. TIG welds do not cause any undercuts or excessive penetration, and the distortion is the lowest of any welding process. TIG welds provide superior quality weld metal, but the productivity is low.

MIG Welding

Gas-Metal-Arc welding is generally called MIG (metal inert gas) welding. In this process, the consumables travels through a nozzle and a tip before it strikes an arc with the work-piece. The arc atmosphere is shielded by gases such as 100% argon, 98% argon with 2% oxygen, 75% argon with 25% carbon dioxide, and 100% carbon dioxide.

The smooth functioning of MIG welding depends on welding parameters, shielding gases, and the consumables. The welding parameters are amperage, voltage, feed of the wire, speed of welding and flow rate of the shielding gas. The feed of the wire has to be adjusted to suit the speed determine the heat input. If these parameters are not synchronized, the welding does not perform well. There could be burnback fusing the tips, or there could be insufficient melting of the wire, resulting in improper fusion. If the gas pressure is insufficient, the metal gets oxidized, leaving inclusions and porosity in weld metal.

There are two different techniques in MIG welding:

In spray type, the liquid weld metal travels from the tip of the consumable in the form of tiny globules to the workpiece. Spray transfer is achieved with higher current densities. In droplet transfer, the liquid metal travels in the form of droplets, and operates at lower current densities. Usually the droplet or short circuiting technique is used in root pass welding, followed by spray transfer for the rest of the welding.

 

 

 

 

 

 

 

 

 

 

 

AWS A5.18 ER70S-2           back to top

ER70S-2 is a triple deoxidized mild steel welding wire for TIG and MIG welding applications. In addition to manganese and silicon, it contains aluminum, titanium and zirconium as deoxidizers. MIG welding of mild steels can be conducted with either carbon dioxide or argon-CO or argon-CO or argon-2% oxygen as shielding gasses. For TIG welding 100% argon is recommended.

Typical Chemical Composition of the wire :

Carbon                  .05
Manganese           1.15
Silicon                   .45
Phosphorus            .022
Sulfur                    .006
Aluminum              .09
Titanium               .06
Zirconium             .04
Copper                 .35
Iron                   Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            74,800 PSI   520 MPA
Yield Strength               62,500 PSI   430 MPA
Elongation                    24%
Impact Strength @ -20 degrees F / -29 degrees C  45 ft-lbs   47 Joules

AWS A5.18 ER70S-3           back to top

ER70S-3 is a mild steel welding wire for TIG and MIG welding applications. MIG welding can be conducted with either argon-oxygen or argon-CO as shielding gasses. For TIG welding, 100% argon is recommended.

Typical Chemical Composition of the wire :

Carbon                  .07
Manganese           1.19
Silicon                   .52
Phosphorus            .021
Sulfur                    .022
Copper                 .40
Iron                   Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            75,500 PSI   520 MPA
Yield Strength               61,500 PSI   420 MPA
Elongation                    23%
Impact Strength @ 0 degrees F / 18 degrees C  35 ft-lbs   47 Joules

AWS A5.18 ER70S-6           back to top

ER70S-6 is a mild steel welding wire with higher levels of deoxidizers (Mn &Si) compared to other mild steel welding wires. This wire is exceptionally suitable for welding of mild steels with moderate amounts of scale or rust. For MIG welding, argon-oxygen or argon-CO may be used as shielding gasses. For TIG welding, 100% argon is recommended as the shielding gas.

Typical Chemical Composition of the wire :

Carbon                  .09
Manganese           1.65
Silicon                   .95
Phosphorus            .022
Sulfur                    .018
Copper                 .35
Iron                   Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            78,000 PSI   540 MPA
Yield Strength               64,500 PSI   450 MPA
Elongation                    24%
Impact Strength @ -20 degrees F / -29 degrees C  45 ft-lbs   60 Joules

AWS A5.28 ER80S-B2           back to top

ER80S-B2 is designed for the gas metal arc welding of 1-1/4 Cr / 1/2 Mo steels which are used for high temperature service. Preheating and interpass temperatures of not less than 300 degrees F must beused during welding.

NOTE: Mechanical properties listed below reflect utilization of a post-weld heat treatment between 1125 degrees f and 1175 degrees F for one hour.

Typical Chemical Composition of the wire :

Carbon                  .09
Manganese            .55
Silicon                   .48
Chromium             1.35
Molybdenum           .55
Phosphorus            .012
Sulfur                    .006
Copper                 .15

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            85,000 PSI   590 MPA
Yield Strength               71,500 PSI   490 MPA
Elongation                    21%
Impact Strength @ 32 degrees F / 0 degrees C  60 ft-lbs   80 Joules

AWS A5.28 ER80S-D2           back to top

ER80S-D2 is a low alloy steel wire with 2% manganese and .5% molybdenum as alloying elements. The weld deposits have moderately high strength with adequate low temperature toughness. A preheat and interpass temperature of not less than 300 degrees is required during welding.

NOTE: Mechanical properties (listed below) of welds are greatly influenced by the preheat, interpass temperature, the heat input, and the post-weld heat treatment.

Typical Chemical Composition of the wire :

Carbon                  .11
Manganese           1.95
Silicon                   .65
Molybdenum          .50
Phosphorus            .012
Sulfur                    .017
Copper                 .25
Iron                   Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            84,000 PSI   580 MPA
Yield Strength               71,500 PSI   490 MPA
Elongation                    19%
Impact Strength @ -20 degrees F / -29 degrees C  35 ft-lbs   47 Joules

AWS A5.28 ER90S-B3           back to top

ER90S-B3 is designed for gas metal arc welding of 2-1/4 Cr / 1 mo steels, which are used for high temperature applications. A preheat and interpass temperature of not less than 350 degrees F should be maintained during welding.

NOTE: Mechanical properties listed below reflect utilization of a post-weld heat treatment between 1250 degrees F and 1300 degrees F for one hour.

Typical Chemical Composition of the wire :

Carbon                  .10
Manganese             .62
Silicon                   .48
Chromium             2.55
Molybdenum          1.08
Phosphorus            .009
Sulfur                    .006
Copper                 .12

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            94,500 PSI   650 MPA
Yield Strength               80,500 PSI   550 MPA
Elongation                    19%
Impact Strength @ 68 degrees F / 20 degrees C  80 ft-lbs   105 Joules
 

AWS A5.28 ER110S-1           back to top

ER110S-1 is intended for applications where high strength, combined with low temperature ductility, are prime considerations. Applications include welding of HY100 and other high strength, low alloy steels. A preheat and interpass temperature of not less than 300 degrees F is required during welding.

NOTE: Mechanical properties (listed below) of welds are greatly influenced by the preheat, interpass temperature, the heat input, and the post-weld heat treatment.

Typical Chemical Composition of the wire :

Carbon                  .07
Manganese           1.55
Silicon                   .45
Chromium             .30
Nickel                   2.30
Molybdenum          .42
Sulfur                    .005
Phosphorus            .008
Copper                 .22
Iron                   Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            114,500 PSI   790 MPA
Yield Strength               98,500 PSI   680 MPA
Elongation                    17%
Impact Strength @ -60 degrees F / -51 degrees C  65 ft-lbs   87 Joules
 
 
 

AWS A5.28 ER120S-1           back to top

ER120S-1 is a high strength low alloy steel welding wire developed for welding of HY100 and other high strength steels. The weld deposits also give adequate low temperature toughness down to -60 degrees F is recommended during welding.

NOTE: Mechanical properties (listed below) of the welds are greatly influenced by the preheat, interpass temperature, the heat input, and the post-weld heat treatment.

Typical Chemical Composition of the wire :

Carbon                  .08
Manganese           1.55
Silicon                   .48
Chromium             .35
Nickel                   2.55
Molybdenum          .50
Sulfur                    .006
Phosphorus            .008
Copper                 .24
Iron                   Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            124,500 PSI   860 MPA
Yield Strength               106,500 PSI   730 MPA
Elongation                    15%
Impact Strength @ -60 degrees F / -51 degrees C  60 ft-lbs   80 Joules

AISI 4130           back to top

*This grade can also be used for submerged arc welding.

AISI 4130 is a high strength, low alloy welding wire for joining steels of similar chemical composition, as well as for overlays where moderate hardness is required. This wire can be used for TIG, MIG and submerged arc welding applications. A preheat and interpass temperature of not less than 400 degrees F is required during welding.

NOTE: Mechanical properties (listed below) of welds are governed by the heat treatment undergone by the weld metal. Mechanical properties above are for weld metal oil quenched from 1550 degrees F and tempered at 1050 degrees F.

Typical Chemical Composition of the wire :

Carbon                  .31
Manganese            .52
Silicon                   .28
Chromium             .93
Molybdenum          .20
Phosphorus            .015
Sulfur                    .012
Copper                 .21
Iron                   Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            145,000 PSI   1000 MPA
Yield Strength               130,000 PSI   900 MPA
Elongation                    11%

AWS A5.28 ER100S-G *          back to top

*This grade can be used for submerged arc welding, where its relevant classification is AWS A5.23 EG.

ER100S-G is a low alloy steel welding wire developed for welding of high strength steels with adequate ductility at low temperatures. The hardness of the undiluted weld will be less than 235 BHN. The requirement of preheat and interpass temperatures should be determined taking the base plate chemistry and thickness into consideration.

NOTE: Mechanical properties (listed below) of the welds are greatly influenced by the preheat, interpass temperature, the heat input, and the post-weld heat treatment.

Typical Chemical Composition of the wire:

Carbon                  .12
Manganese           1.45
Silicon                   .60
Chromium            .30
Nickel                   .95
Molybdenum      .40
Phosphorus        .014
Sulfur                   .015
Copper                .25
Iron                   Balance

Mechanical Properties of all weld metal (as welded) :

Tensile Strength            104,000 PSI   720 MPA
Yield Strength               88,000 PSI   610 MPA
Elongation                    25%
Impact Strength @ -75 degrees F / -59 degrees C  50 ft-lbs   67 Joule

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