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Boiler Quality Steel Plates

Boiler Quality steel is used in areas where there is likely to be a high degree of Boiler Quality or Boiler Quality of the steel plate. Typical applications are in truck beds, attachments to diggers and earth movers and in processing applications in the mining industry.

The key quality for Boiler Quality steels is their hardness. We sell Boiler Quality plate according to its hardness measured on the Brinnell Hardness Test - usually in 400HB and 500HB grades. If your specification is to the Rockwell Test we can also advise.

Steels with a high HB rating (Brinell hardness) are intended for applications where Boiler Quality or Boiler Quality resistance is important. The benefit of using an Boiler Quality steel is that that the plant, machinery or constructions working life can be extended considerably. This can significantly improve the reliability, durability and safety of structures and equipment. It also helps to reduce the maintenance costs associated with Boiler Quality and breakdown of plant.

400 HB steel is over 3 times harder than mild steel (120HB), but only a third as hard as stainless steel (1250HB). Example uses are for construction machinery, skips, bulldozers and excavators, buckets and conveyors.

The steel is quenched which provides Boiler Quality resistance; in order to improve hardness it may also be tempered. Lower HB's generally provide good cold bending properties and good weld ability. Weld ability is not generally reduced as the hardness increases.

Boiler Quality steels is not appropriate for use at temperatures over 250⁰C as the heat can cause changes to the material properties.

Testing is undertaken by firing 10mm steel or tungsten carbide ball at 29kN and the size of the resulting indentation is measured. Tests are carried out according to EN ISO 6506 or ASTM E10. The figures below are representative of 15mm thick 400HB and 500HB plates.

	C Max	Si Max	Mn Max	P Max	S Max	Cr Max
400 HB	0.15%	0.70%	1.60%	0.225%	0.01%	0.50%
500 HB	0.29%	0.70%	1.60%	0.025%	0.01%	1.00%

	Ni Max	Mo Max	B Max	CEV	CET
400 HB	0.25%	0.25%	0.004%	0.37%	0.27%
500 HB	0.50%	0.30%	0.004%	0.62%	0.41%

Values are typical and for general information purposes only.

Yields for 400HB steel are in the region of 1100 MPa with tensile strengths of about 1250 MPa.

Boiler Quality plates from TOSHWIN TUBES INDIA are available in the following dimensions and certificated to EN 10204 3.1 B, dependent on the product required.

Brand name supplied by us is of TISCRAL / SAILHARD/ JISCRAL/ LAS07 / HARDOX / DILLIDUR / DUROSTAT / ABRASO / XAR AND Other well known brands.

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