The CRUXWELD ARC400iS is a 400A arc welding machine built for structural fabrication, site erection and heavy repair. A 415 V three-phase digital inverter runs 2.5 to 5 mm electrodes (rutile, low-hydrogen 7018 and cellulosic 6010) with hot start, arc force and anti-stick set from two knobs on the front panel. Compact enough for one person to carry to the joint, and at 85% efficiency it draws a fraction of what a 400 A rectifier does.
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A 400 A class is where stick welding gets serious: 5 mm electrodes on thick plate, root runs with 6010 on pipe, and shifts that run all day.
The ARC400iS 400A arc welding machine delivers a full 400 A from a 14 kVA three-phase supply, in a portable inverter case instead of a transformer-rectifier that needs a trolley.
It is a digital inverter: the control board watches arc voltage and current thousands of times a second and corrects them before the welder can see a change. The result is an arc that stays stable on long leads, on weak site supplies and on generators.
02
Tap a function to see what it does to the welding current:
Hot start adds current for a fraction of a second at the strike so the rod lights cleanly.
Arc force adds current whenever the arc shortens, keeping the arc alive when you push the rod into the puddle on vertical or overhead welds.
If the rod freezes the current cuts in milliseconds; break it off and carry on without a glowing holder.
The 400A arc welding machine is housed in a powder-coated steel enclosure with moulded corner guards, louvred side panels and twin top handles. Forced-air cooling, class H insulation, IP23S protection: it sits in an open yard in the rain and keeps working.
04
Set current, set arc force, strike. Tap an electrode:
Thin section, tack welds, sheet 3 mm
General fabrication, 5–8 mm plate
Structural steel, fillets 6 mm+
Heavy sections, multi-pass, 12 mm+
Pipe root runs, vertical-down
Typical ranges for DC welding; follow the electrode manufacturer’s box for the exact setting. With 20–400 A on the dial, the 400A arc welding machine covers every one of them with headroom.
07
For single-phase workshops see the ARC 250 and ARC 300; for two welders on one machine with gouging, the ARC630-2T. If you must have a transformer-rectifier, the Welding Rectifier 400 is still in the range.
Longer leads, a wheeled trolley and a hand shield are optional; the exact scope is confirmed on the quotation. See the full range on our products page.
Tell us your electrodes and plate: we will confirm the fit and send a quotation.
| Parameter | ARC400iS |
|---|---|
| Model | ARC400iS |
| Type | 400A arc welding machine, digital IGBT inverter |
| Welding process | MMA / SMAW (stick), DC |
| Input voltage | AC 415 V ±20%, 3 phase |
| Frequency | 50 / 60 Hz |
| Max input power | 14 kVA |
| Open-circuit voltage | 85 V |
| Welding current range | 20 – 400 A |
| Rated output voltage | 34 V |
| Welding current @ 60% duty | 400 A |
| Welding current @ 100% duty | 310 A |
| Efficiency | 85% |
| Suitable electrodes | 2.5, 3.2, 4 and 5 mm — rutile, 7018, 6010 |
| Hot start / arc force | Adjustable from front panel |
| Anti-stick | Yes |
| Generator compatible | Yes |
| Input protection | Over-voltage, under-voltage, overload, single-phasing |
| Cooling | Forced air |
| Degree of protection | IP23S |
| Insulation class | H |
| Dimensions (L × W × H) | 565 × 306 × 502 mm |
| Weight (approx.) | 28 kg |
Specifications are subject to improvement without notice; the quotation and test certificate supplied with the machine are the governing documents. Warranty terms are stated on the quotation / invoice.
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Requirement of 300 amps arc welding machine
We require heavy duty 400 amp welding machines , delivery to Visakhapatnam. Qty 2 .Please quote
Sure sir.
DC Arc Welding Machine,(Range: 10-400 Amps) required quantity: 10.
Delivery: Dhaka, Bangladesh
Please send a quotation
Sure, sir, we will revert with the quotation.
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Welding machine 600 Amps Explosion proof need .please quote
We will do the needful.
Send a quotation
We will do the needful
pl tell me the difference between ARC 400 & ARC 400 ij which one is best for radiography quality welding with 6010,6013,7010,7018 electrodes
We will explain it to you.
Have you any delar in Nagpur Maharashtra please give me contact number
We will do the needful.
Sir pls quote 400amps welding misine
I want complete set up for GTAW (Torch, Rectifier, Gas tubing, regulator, Metal (W) Electrode (1 pack) and other required accessories).
Quote for the PPEs saperately
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Cruxweld team thank you for the interest shown in our welding machine. We will get back to you.
I want purchase 3phase 400 amp arc welding machine qty 2
The team Cruxweld thank you for welding machine enquiry. Our team at Cruxweld will inform you best welding machine price.
i want to know the price that ARC 250
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We need welding sets for resale in Punjab
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And also send specifications
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Delivery at howrah
Hello, Good Morning,
How much, 3 phase kw or hp we need to purchase from tamilnadu EB for work with 400 amps welding machine . Please advice, I want to get new connection from EB for grill gate, small jobs making shop and purchase your 400 amps model machines.
400 amp arc welding machine
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Good afternoon. Do you have AC/DC arc welding machine 250-300amps?
Arc Welding Machine 400A
Can weld 5mm rod in single face continue 1 hours
Arc Welding Machine 400A
Can weld 5mm rod in single face continue 1 hours