080M40 Steel
BS970/PD970: 1970 onwards 080M40 080M40 is usually supplied untreated but can be supplied to order in the normalized or finally heat treated (quenched and tempered to "Q" or "R" properties for limiting ruling sections up to 63mm), which is adequate for a wide range of applications. Please refer to our selection guide for comparisons. 080M40 is a very popular grade of through-hardening medium carbon steel, which is readily machinable in any condition. (Refer to our machinability guide). 080M40 is suitable for the manufacture of parts such as general-purpose axles and shafts, gears, bolts and studs. It can be further surface-hardened typically to 50-55 HRC by induction processes, producing components with enhanced wear resistance. For such applications the use of 080A42 (EN8D) is advisable. It is also available in a free-machining version, 212A42 (EN8M) 080M40 in its heat treated forms possesses good homogenous metallurgical structures, giving consistent machining properties. Good heat treatment results on sections larger than 63mm may still be achievable, but it should be noted that a fall-off in mechanical properties would be apparent approaching the centre of the bar. It is therefore recommended that larger sizes of 080M40 are supplied in the untreated condition, and that any heat treatment is carried out after initial stock removal. This should achieve better mechanical properties towards the core.
KV Steel Services is a supplier of 080M40, 080A42 and 212A42 steel to local and national businesses. We stock 080M40 and 080A42 in bright bar and blocks and black bar, square, flats and blocks. |
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