Standards · IS 5760 · IS 7285 (Part 1):2018 · IS 3224:2021
IS 5760: the Indian Standard for argon and why purity is the whole product
Argon in India is specified by IS 5760, covering compressed and liquid argon. It is filled into seamless steel cylinders to IS 7285 Part 1, valved to IS 3224, painted peacock blue shade 103 under IS 4379 with no neck band, and requalified every 5 years under IS 8451.
- Gas specification
- IS 5760
- Cylinder construction
- IS 7285
- Cylinder identification
- Peacock blue
- Principal use
- TIG and MIG shielding
- Periodic retest
- Every 5 years
What IS 5760 covers
IS 5760, Argon, compressed and liquid, is the Indian Standard specifying argon as a product, in both the cylinder form and the bulk liquid form.
One caution about the number. The BIS document mirror used to verify the other standards on this site carries no entry for IS 5760 — while returning IS 307, IS 309, IS 1090 and IS 1747 correctly. That is a hole in the mirror rather than evidence about the standard, but it does mean the edition has not been independently confirmed here. Check the current edition against the live BIS catalogue before citing it on a tender, which is good practice for any standard and essential for this one.
Purity is the product
With most industrial gases, purity is a specification. With argon, it is the entire point.
In shielded-arc welding the gas is not a consumable that gets used up — it is the atmosphere the weld is made in. Anything the argon carries with it ends up in the weld pool:
- oxygen — oxide inclusions, dull and discoloured beads
- nitrogen — porosity, and lost toughness in the finished joint
- moisture — porosity again, and hydrogen where it is least wanted
On carbon steel a slightly poor argon may pass unnoticed. On stainless and on aluminium it shows immediately, in the colour of the bead and the behaviour of the arc. Welders usually detect a bad cylinder before any instrument does.
That is why “cheap argon” is rarely cheap. The saving is measured in rupees per cylinder and the cost in rejected welds.
Argon or CO₂ for MIG?
A question we are asked constantly, and the answer is not about price:
| Pure argon | Carbon dioxide | |
|---|---|---|
| Transfer | Stable spray, clean bead | Harsher, more spatter |
| Penetration on steel | Shallow | Deep |
| Arc stability | High | Lower |
Most steel MIG work therefore runs on a mixture, taking argon’s stability with some of CO₂’s penetration. The right ratio depends on the parent metal, the thickness and the transfer mode — tell us those three and the gas can be specified properly. See gas mixtures.
The quiet hazard
Argon is inert and non-toxic, which is exactly what makes it dangerous indoors. It displaces air with no smell, taste or warning, and it is denser than air, so it settles into pits, trenches, tank bottoms and any low confined space.
A person in an oxygen-depleted atmosphere can lose consciousness before recognising anything is wrong. Confined-space entry after argon work is a procedure, not a judgement call. The full hazard data is in the argon safety data sheet.
The standards that go with it
| Standard | What it governs |
|---|---|
| IS 7285 (Part 1) | The seamless steel cylinder |
| IS 3224 | The valve |
| IS 4379 | Peacock blue, shade 103, no band |
| IS 8451 | Five-yearly hydrostatic retest |
How KIGL fills it
Argon is filled to IS 5760 at the Guwahati works, into cylinders built and requalified to the standards above. Tell us the process — TIG or MIG, the parent metal, the thickness — and the grade will be specified against the work rather than against a price list. See argon gas for supply detail.
IS 5760 — frequently asked questions
Which Indian Standard specifies argon?
IS 5760, covering argon in both compressed and liquid form. Note that the BIS document mirror carries no entry for it, which is a gap in that mirror rather than evidence the standard does not exist — the standard is real and in use. Confirm the current edition against the live BIS catalogue before citing it on a tender.
Why does argon purity matter so much?
Because in shielded-arc welding the gas is not a consumable that merely gets used up — it is the atmosphere the weld is made in. Oxygen, nitrogen or moisture carried in with the argon end up in the weld pool, and show as porosity, discoloured beads, loss of toughness and arc instability. On stainless and on aluminium the effect is visible immediately.
What colour is an argon cylinder in India?
Peacock blue, shade 103 under IS 4379, with no neck band. Shade numbers come from IS 5:1978, the ready-mixed paint standard — quoting the shade number rather than the colour name is what makes the scheme reproducible between paint suppliers. "Peacock blue" is an opinion; shade 103 is a specification.
Can I use argon and CO₂ interchangeably for MIG?
No, and the difference is not just cost. Pure argon gives a stable spray transfer and a clean bead but shallow penetration on steel; carbon dioxide penetrates deeply but spatters and destabilises the arc. Most steel MIG work uses a mixture for that reason. Tell us the parent metal, the thickness and the transfer mode and we will specify the gas.
Is argon dangerous if it leaks?
It is inert and non-toxic, and that is precisely why it is dangerous in a confined space. It displaces air without smell, taste or warning, and a person in an atmosphere depleted of oxygen may lose consciousness before understanding anything is wrong. Argon is also denser than air, so it collects in pits, trenches and tank bottoms.
How often must an argon cylinder be retested?
Every five years, hydrostatically, to IS 8451:2018 — the same as the other compressed gases in the range. Dissolved acetylene is the exception at two years, under IS 8433.
Enquiries
Request a quotation
State the gas or equipment, the quantity or capacity, and your location. KIGL will confirm the grade, the cylinder or plant size, and whether the location can be served from Noonmati, or through our agent network.