Berylco alloys properties

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B25 HM	B25 HMB

Alloy	Type	Temper	Tensile Strength (Mpa)	90° bending R/t
Alloy	Type	Temper	Tensile Strength (Mpa)	Long.	Trans.
Berylco 25 CuBe2 CW101C C17200	Type B	1/2HMB	830 - 930	0.0	0.0
		HMB	930 - 1030	1.0	1.0
		XHMB	1070 - 1210	2.0	2.0
		XHMSB	1210 - 1310	3.5	6.0
	Type S	HM-Type S	960 - 1040	0.5	0.5
		XHM-Type S	1060 - 1220	1.0	1.0

Typical R/t of 0.15mm thickness samples

Formability of New NGK Berylco Strip products

Comparison of bending formability

Comparison of bending formability test of B25 HM (standard) and B25 HMB (New Grade ‘Type-B’).

Photos show the 90º bending test results (Bad Way, R/t = 1.0, thickness 0.2mm). There are micro cracks on the usual product B25 HM, but new grade B25 HMB has no cracks. Good Formability is achieved in new grade ‘Type B’ and ‘Type S’. Both alloy tensile strength is equal to 1000 N/mm².

New Alloys - Better formability at equal strength

Mill-hardened Alloy B25 ‘Type-B’ and ‘Type-S’

Features

New grade ‘Type-B’ and ‘Type-S’ mill-hardened Berylco 25 have been developed by refinement of the manufacturing process for improved formability.

The bend radius ratio(R/t) of ‘Type-B’ is half that of the usual mill-hardened alloy.

The bend radius ratio(R/t) of ‘Type-S’ is one quarter that of usual due to crystal-grain-size-control.

Mill-hardened alloy is pre-aged (hardened) in the mill. Using mill-hardened alloy frees our clients from the troublesome aging process.