BS 970 (Part 1):1983 150M36 Steel: Specifications & Listings

Residual elements: see clause 1.7.3.

Source: BS 970 (Part 1):1983, Table 6

Heat treatment to be given to test bars and to material required in the finally heat treated condition. Note 24: O = oil, W = water. Where oil hardening is specified, either a well-agitated conventional oil or a proven synthetic quenchant may be used. Synthetic quenchants shall not be used for the heat treatment of test bars for material not supplied in the finally heat treated condition.

Source: BS 970 (Part 1):1983, Table 7

Condition	Limiting ruling section (mm)	Rm (N/mm2)	Re min (N/mm2)	A min (%)	Izod min (ft lbf)	KCV min (J)	Rp0.2 min (N/mm2), when specifically ordered	HB
Q	150	625-775	400	18	35	42	370	179-229
R	63	700-850	480	16	30	35	450	201-255
S	29	775-925	555	14	30	35	525	223-277
T (note 13)	13	850-1000	635	12	25	28	620	248-302

Values as printed in Table 6 for the limiting ruling section shown. Rp0.2 applies when specifically ordered (note 10). 1 N/mm2 = 1 MPa. Note 13: may not always be obtained by bulk heat treatment, but the properties can be achieved by the appropriate heat treatment of die forgings and components, and also apply to test bars.

Source: BS 970 (Part 1):1983, Table 6

Condition	Heat treatment condition	Size, diameter or across flats (mm)	Rm (N/mm2)	Re min (N/mm2)	A min (%)	Izod min (ft lbf)	KCV min (J)	Rp0.2 min (N/mm2), when specifically ordered	HB
Normalized + turned or ground	-	6 to 150	620 min	385	14	-	-	-	179-229 (note 4)
Normalized + turned or ground	-	over 150 to 250	600 min	355	15	-	-	-	170-223 (note 4)
Hardened and tempered + turned or ground	Q	over 19 to 150	625-775	400	18	35	42	370	179-229
Hardened and tempered + turned or ground	R	over 13 to 63	700-850	480	16	30	35	450	201-255
Hardened and tempered + turned or ground	S	6 to 29	775-925	555	14	30	35	525	223-277
Hardened and tempered + turned or ground	T (note 13)	6 to 13	850-1000	635	12	25	28	620	248-302
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	Q	over 19 to 150	625-775	440	13	35	-	400	179-229 (note 4)
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	R	over 13 to 63	700-850	520	12	30	-	480	201-255 (note 4)
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	S	6 to 29	775-925	580	10	30	-	540	223-277 (note 4)
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	T (note 13)	6 to 13	850-1000	665	9	25	-	635	248-302 (note 4)

Size is the diameter or across flats. For cold drawn bar of 6 mm or less, all mechanical properties are subject to agreement between purchaser and supplier at the time of enquiry and order (note 8). For normalizing and hardening and tempering treatments see Tables 3 and 7 (note 9). Rp0.2 applies when specifically ordered (note 10). 1 N/mm2 = 1 MPa. Hardness values marked note 4 are for guidance only. Note 13: may not always be obtained by bulk heat treatment, but the properties can be achieved by the appropriate heat treatment of die forgings and components, and also apply to test bars.

Source: BS 970 (Part 1):1983, Table 4 (bright bar)

Appendix D note 47: where a comparison is made the steels are not necessarily equivalent. 'Not listed' means the earlier edition has no entry under this designation.

Source: BS 970 (Part 1):1983, Appendix D