AS/NZS 3678-250 · 3679.1-300
Mild steel
Plate, flat bar, RHS and angle for frames, brackets and base plates. Welds easily; needs a coating outdoors.
- Density
- 7850 kg/m³
- Forms
- Plate 1.6–25, bar, RHS/SHS
- Weld
- MIG
Grades we cut, machine and weld every week.
The right grade is the one the drawing calls for. Where a request and a drawing disagree (304 in the email, 316L on the title block) we ask before we buy a single plate.
Material grades
Galvanised · Z275
Pre-galvanised steel
Sheet for covers and enclosures. Cut edges are left raw unless hot-dip galvanised after fabrication.
- Density
- 7850 kg/m³
- Forms
- Sheet 0.55–3.0
- Weld
- Avoid where possible
304 · 316L
Stainless steel
304 for general corrosion resistance; 316L where chlorides, food acids or washdown chemicals are involved. Passivated after welding.
- Density
- 7930 / 7980 kg/m³
- Forms
- Sheet, plate to 16, bar, tube
- Weld
- TIG
5052-H32 · 5083-H321 · 6061-T6
Aluminium
5052 folds cleanly for covers; 5083 for marine and plate work; 6061-T6 machines well for blocks and fittings.
- Density
- 2680 / 2660 / 2700 kg/m³
- Forms
- Sheet, plate to 20, bar
- Weld
- TIG (AC)
AISI 4140 PH · 1045
Alloy & carbon bar
Pre-hardened 4140 for shafts and wear parts; 1045 for general turned work. Black oxide or zinc plated to finish.
- Density
- 7850 kg/m³
- Forms
- Round bar Ø12–Ø200
- Weld
- With procedure only
Brass · bronze · plastics
On request
Brass, bronze and engineering plastics (acetal, nylon, UHMWPE) for machined bushes and wear pads, bought in per job.
- Density
- Per grade
- Forms
- Bar and plate
- Weld
- —
Mass from volume × density.
The same method our estimates use for material allowance: blank size from the drawing, a cutting allowance, then mass. Try it with your own part.
Traceability, when your job needs it.
Ask for traceable material on the RFQ and we'll buy from suppliers who issue mill certificates, keep heat numbers against the job card, and transfer them to offcuts.
- 3.1
Mill certificates on request
Supplied with the delivery documents when the material supplier provides them.
- HEAT
Heat numbers on the job card
Recorded at cutting so each part can be traced back to its plate or bar.
- OFF
Marked offcuts
Remnants keep their grade and heat marking so they never become "probably 304".
Grade on the drawing? Good.
If it's not, or the email says something different, we'll list it as a question with your quote.
Request a quote