Is HE30 the same as 6351?

Yes, HE30 (or H30) is the old Indian name for alloy 6351; it is also close to 6082.

Can 6351 replace 6061?

In most machined parts, yes; check the drawing if a specific standard is named.

Yes, by TIG or MIG, but strength near the weld falls unless the part is heat treated again.

Aluminium 6351 (HE30): properties, vs 6061 and 6063

Aluminium 6351 is a medium-strength aluminium–magnesium–silicon alloy, known in India by its old name HE30 (or H30). In the T6 temper it is stronger than 6063 and close to 6061 and 6082, machines well and takes anodising. It is widely stocked in India as bars, plates and extruded sections for machined parts, frames, structures and transport parts.

Quick facts

Old Indian name: HE30 / H30 (IS 733)
Type: Al–Mg–Si, heat treatable
Tensile strength: About 290–310 MPa in T6
Density: About 2.7 g/cm³
Machinability: Good in T6
Anodising: Good

Equivalent grades

Standard	Grade
AA	6351
IS 733 (old)	HE30 / H30
EN (close)	6082 (AlSi1MgMn)

Equivalents are close, not identical. Name the grade and standard on the drawing.

6351, 6061, 6063 or 6082?

	6351	6061	6063	6082
Strength (T6)	Medium–high	Medium–high	Lower	Medium–high
Machining	Good	Good	Fair (gummy)	Good
Extruding complex shapes	Fair	Fair	Excellent	Fair
Common in India as	Bars, plates, sections	Bars and plates	Window and frame profiles	Bars and plates

Typical uses

Machined brackets, housings and fixtures
Structural sections and frames
Truck, bus and railway parts
Pneumatic cylinder bodies and manifolds

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Questions

Is HE30 the same as 6351?: Yes, HE30 (or H30) is the old Indian name for alloy 6351; it is also close to 6082.
Can 6351 replace 6061?: In most machined parts, yes; check the drawing if a specific standard is named.
Can 6351 be welded?: Yes, by TIG or MIG, but strength near the weld falls unless the part is heat treated again.

The figures on this page are typical values for guidance, written by Diemeco from standard engineering practice. They are not a specification: confirm grades and properties with the relevant standard or the supplier's mill test certificate, and tolerances with your workshop. Last checked 29 October 2026.