0.030" Wire | McMaster-Carr

ER70S-2—ER70S-2 wire is good for welding over rust and mill scale. It is made from a blend that helps remove contaminants and imperfections from the weld pool.

ER70S-3—ER70S-3 wire is good for welding carbon steel in general fabrication applications. It has a low silicon content, so you can powder coat your welds.

ER70S-6—ER70S-6 wire is good for welding dirty, oily, and rusty steel. You can also use it to join misaligned pieces together. It creates X-ray quality welds without air pockets for a smoother and more uniform welding bead than standard welding wire. Its high silicon content allows it to flow easily when melted, so it spreads out to fill in the space between two pieces of your weld before hardening.

							2 lb.				11 lb.				33 lb.
	Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
ER70S-2



		0.030"	Solid	DCEP	Yes	No	410	4"	0.63"	00000000	000000	8"	2"	00000000	000000	—	—	———	0


		ER70S-3



				0.030"	Solid	DCEP	Yes	No	410	4"	0.63"	00000000	00000	8"	2"	00000000	00000	—	—	———	0


				ER70S-6



						0.030"	Solid	DCEP	Yes	No	500	4"	0.63"	00000000	00000	8"	2"	00000000	00000	12"	2"	00000000	0000000

MIG Welding Wire for Stainless Steel

Join stainless steel with this welding wire.

ER308L

ER308L wire is for 304 and 304L stainless steel. It creates welds that hold even in cryogenic temperatures.

						2 lb.				10 lb.				30 lb.
Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
0.030"	Solid	DCEP	Yes	No	400	4"	0.63"	00000000	000000	8"	2"	00000000	0000000	12"	2"	00000000	0000000

ER308LSi

ER308LSi wire is for 304 stainless steel. It has a higher silicon content than ER308L wire, so it flows more easily when melted and fills in more of the space between the two pieces of your weld. It’s also better where appearance matters because it creates smoother welds.

						2 lb.				10 lb.				30 lb.
Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
0.030"	Solid	DCEP	Yes	No	400	4"	0.63"	00000000	000000	8"	2"	00000000	000000	12"	2"	00000000	0000000

ER309L

ER309L wire joins different types of stainless steel. It’s also for use with steel.

						2 lb.				10 lb.
Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
0.030"	Solid	DCEP	Yes	No	400	4"	0.63"	00000000	000000	8"	2"	00000000	0000000

ER309LSi

ER309LSi wire is for 309 stainless steel. It has a higher silicon content than ER309L wire, so it flows more easily when melted and fills in more of the space between the two pieces of your weld. It’s also better where appearance matters because it creates smoother welds.

						2 lb.				10 lb.
Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
0.030"	Solid	DCEP	Yes	No	400	4"	0.63"	00000000	000000	8"	2"	00000000	0000000

ER316L

ER316L wire is for 316 and 316L stainless steel.

						2 lb.				10 lb.				30 lb.
Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
0.030"	Solid	DCEP	Yes	No	400	4"	0.63"	00000000	000000	8"	2"	00000000	0000000	12"	2"	00000000	0000000

ER316LSi

ER316LSi wire is for 316 stainless steel. It has a higher silicon content than ER316L wire, so it flows more easily when melted and fills in more of the space between the two pieces of your weld. It’s also better where appearance matters because it creates smoother welds.

						2 lb.				10 lb.
Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
0.030"	Solid	DCEP	Yes	No	400	4"	0.63"	00000000	000000	8"	2"	00000000	0000000

ER347

ER347 wire is for 321 and 347 stainless steel. It contains niobium, which reduces the chances of corrosion forming in your weld during the welding process.

						2 lb.				5 lb.				10 lb.
Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
0.030"	Solid	DCEP	Yes	No	400	4"	0.63"	0000000	000000	8"	2"	00000000	0000000	8"	2"	0000000	0000000

MIG Welding Wire for Thin-Gauge Steel

Use this wire on thin-gauge steel such as sheet metal.

E71T-GS—E71T-GS can weld galvanized steel.

						1 lb.				2 lb.				10 lb.
	Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
E71T-GS



		0.030"	Flux Core	DCEN	No	450	4"	0.63"	00000000	000000	4"	0.63"	00000000	000000	8"	2"	00000000	0000000


		E71T-11



				0.030"	Flux Core	DCEN	No	420	—	—	———	0	—	—	———	0	8"	2"	00000000	000000


				0.030"	Flux Core	DCEN	No	450	4"	0.63"	00000000	00000	4"	0.63"	00000000	00000	—	—	———	0

Coated Wire Rope

3 × 7 Hollow Core

Hang fixtures and tether equipment without scratching hooks and other nearby objects. The plastic coating on this wire rope prevents abrasion while further protecting the inner wires from corrosion and damage. All rope is manufactured in the U.S.

Warning: Not for overhead lifting.

18-8 Stainless Steel—With solid stainless steel construction, this wire rope has no plating that could wear away. It resists rust, but it won't hold up to the harsh chemicals that 316 stainless steel can.

Nylon Coating—Resists abrasion better than other coatings. It also stands up to mild chemicals, but will swell if exposed to moisture.

Wire Rope Construction—Strand cores are more crush and impact-resistant than hollow cores. However, you can run electrical wiring or fluid conduit through hollow core ropes.

Preformed—With each wire shaped into a spiral before being twisted onto the rope, they maintain their shape when cut. This keeps them from unraveling or poking equipment and users.

	Dia. with Coating	Wt. Cap., lb.	Wire Rope Construction	Recommended Pulley/Drum Dia.	Preformed	Specifications Met	Coating Color	Choose a Length, ft.		Per Ft.
18-8 Stainless Steel with Nylon Coating



	0.030"	0.047"	20	3 × 7 Hollow Core	1 9/16"	Yes	MIL-DTL-83420	Clear	25 , 50 , 100 , 300 , 500	0000000	00000

Low-Melting-Point Solder for Low-Temperature Applications

Even as temperatures approach absolute zero, this indium solder remains soft and malleable, allowing it to form an airtight seal between metal and certain non-metal materials. It’s often used in cryogenic applications, including those with liquid nitrogen. This solder has a lower melting point than most solders, so it’s good for sensitive assemblies, such as semiconductors and electronic components. Unlike commonly used tin-based solders, this solder won’t damage gold plating on circuit boards. It’s also a good conductor of heat and electricity. More durable than standard tin-lead solder, this solder is less likely to crack from repeated temperature swings. It’s low outgassing, so it’s good for use in high-vacuum applications.

This indium-based solder can be cold welded, meaning it will bond to itself without heat. You can also use it for step soldering with traditional solders. It does not have a flux core; choose soldering flux to prepare workpieces for this solder.

Leaded, Flux Required

Image of Product. Front orientation. Solder. Low-Melting-Point Solder for Low-Temperature Applications.

Leaded solder has greater tensile strength and density than other indium-based solders, giving it a stronger hold.

		Material Composition							0.16 oz.
	Solder Alloy	Indium	Silver	Lead	Dia.	Melting Temp., ° F	Thermal Conductivity, W/(m⋅°C)	Tensile Strength, psi		Each
For Joining Aluminum, Brass, Bronze, Ceramic, Glass, Gold, Nickel, Quartz, Stainless Steel, Steel, Zinc



		In80Pb15Ag5	80%	5%	15%	0.030"	310	43	2,550	0000000	0000000

Lead-Free, Flux Required

Lead-free solder is safer to use than leaded solder and helps meet industry regulations.

100% Indium—Solder that is 100% indium has better thermal conductivity than solder that contains tin, and will cold weld more easily. However, it has lower tensile and shear strength than solder with tin.

48% Tin—Solder with 48% tin has greater tensile and shear strength than 100% indium solder, but lower thermal and electrical conductivity.

		Material Composition							0.11 oz.
	Solder Alloy	Indium	Tin	Lead	Dia.	Melting Temp., ° F	Thermal Conductivity, W/(m⋅°C)	Tensile Strength, psi		Each
For Joining Aluminum, Brass, Bronze, Ceramic, Glass, Nickel, Quartz, Stainless Steel, Steel, and Zinc



		In52Sn48	52%	48%	0%	0.030"	245	34	1,720	0000000	0000000


		In100	100%	—	0%	0.030"	315	86	270	0000000	000000

MIG Welding Wire for Aluminum

Pair this wire with a MIG gun to fuse aluminum pieces together.

ER1100—ER1100 wire is for 1100, 3003, and 5005 aluminum. Soft and easy to form, it’s often used to weld thin-gauge aluminum and foil. It also resists chemicals and corrosion. Anodize this wire to create a bright finish.

ER4043—ER4043 wire is for 43, 356, 3003, 3004, 5052, 6061, and 6063 aluminum.

ER4047—ER4047 wire is for 43, 356, 3003, 3004, 5052, 6061, and 6063 aluminum. Choose ER4047 wire when leak-tight joints are a must, such as when welding very thin aluminum or products that will hold pressurized liquids or gases. It flows more easily when melted than ER4043, so it spreads out and fills in more of the space between two pieces of your weld before hardening. It also shrinks less as it cools, which means it’s less likely to distort your weld. This wire stands up to prolonged high heat. Once hardened, it produces a bright finish with little soot.

							1 lb.				4 lb.
	Dia.	Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
ER1100



		0.030"	Solid	DCEP	Yes	No	1,200	4"	0.63"	00000000	000000	—	—	———	0


		ER4043



				0.030"	Solid	DCEP	Yes	No	1,200	4"	0.63"	00000000	00000	8"	2.125"	00000000	000000


				ER4047



						0.030"	Solid	DCEP	Yes	No	1,200	4"	0.63"	00000000	00000	—	—	———	0

High-Strength MIG Welding Wire for Steel

This wire creates stronger welds on steel than standard welding wire for steel.

ER80S-D2—ER80S-D2 wire creates 15% stronger welds than standard welding wire. It can make X-ray quality welds, so it’s often used in applications such as pressure tanks, gas pipes, and heat exchangers.

							2 lb.				11 lb.				33 lb.
	Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
ER80S-D2



		0.030"	Solid	DCEP	Yes	No	500	4"	0.63"	0000000	000000	8"	2"	0000000	000000	12"	2"	0000000	0000000

MIG Welding Wire for Joining Copper to Steel

Join copper, copper-silicon, and copper-zinc to themselves and to steel. This wire is also good for welding uncoated or galvanized steel sheets.

							2 lb.				11 lb.				33 lb.
	Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
ERCuSi-A



		0.030"	Solid	DCEP	Yes	No	380	4"	0.63"	00000000	000000	8"	2"	00000000	0000000	12"	2"	00000000	0000000

High-Strength MIG Welding Wire for Aluminum

This wire creates 40% stronger welds than standard welding wire for aluminum.

ER5356—ER5356 rods weld aluminum 5050, 5052, 5083, 5454, 5456, 5457, and 5458. They have excellent corrosion resistance to salt water.

							1 lb.				5 lb.				16 lb.
	Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
ER5356



		0.030"	Solid	DCEP	Yes	No	1,220	4"	0.63"	00000000	000000	8"	2"	00000000	0000000	12"	2"	00000000	0000000

Fast-Deposit MIG Welding Wire for Steel

Make welds quickly with this fast-melting wire.

ER70S-7—ER70S-7 wire is good for general purpose applications.

							2 lb.				11 lb.
	Dia.	Welding Wire Construction	Welding Current Designation	Shielding Gas Req.	Shielding Gas Included	Approx. Lg. per lb., ft.	Spool Dia.	Arbor Hole Size		Each	Spool Dia.	Arbor Hole Size		Each
ER70S-7



		0.030"	Solid	DCEP	Yes	No	410	4"	0.63"	00000000	000000	8"	2"	00000000	000000

High-Density Low-Melting-Point Solder

This bismuth-tin solder has similar performance properties to lead solder, but is also safe for use in food-processing equipment and copper water pipes. It has a lower melting point than most solders, so it’s good for sensitive assemblies, such as semiconductors and electronic components, as well as for step soldering with traditional solders. However, it’s less thermally conductive than other metals and more brittle than lead. Flux isn’t required, but for easier cleanup use it with no-clean soldering flux. Do not use this solder on drinking water pipes.

Lead-Free, No Flux Required

Lead-free solder is safer to use than leaded solder and helps meet industry regulations.

1% Silver—Solder with 1% silver forms stronger bonds than solder without silver. It’s also more malleable and ductile. However, it has a higher melting point, so it takes longer to solder.

		Material Composition							0.12 oz.
	Solder Alloy	Bismuth	Tin	Silver	Lead	Dia.	Melting Temp., ° F	Lg.		Each
For Joining Aluminum, Brass, Bronze, Copper, Nickel, Stainless Steel, Steel, and Zinc



		Bi57Sn42Ag1	57%	42%	1%	0%	0.030"	285	36"	00000000	0000000


		Bi58Sn42	58%	42%	—	0%	0.030"	280	36"	00000000	000000