BS 970 (Part 1):1983 120M36 Steel: Specifications & Listings

Residual elements: see clause 1.7.3.

Source: BS 970 (Part 1):1983, clauses 1.7.2.1 and 1.7.3, Table 2

Condition	Limiting ruling section (mm)	Rm min (N/mm2)	Re min (N/mm2)	A min (%)	Izod min (ft lbf)	KCV min (J)	HB
Normalized	150	590	355	15	-	-	174-223
Normalized	250	570	340	16	-	-	163-217

Values as printed in Table 2 for the limiting ruling section shown.

Source: BS 970 (Part 1):1983, Table 2 and Table 3

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	100	625-775	415	18	30	35	385	179-229
R	29	700-850	510	16	25	28	480	201-255
S	19	775-925	570	14	25	28	555	223-277

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.

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	590 min	355	15	-	-	-	174-223 (note 4)
Normalized + turned or ground	-	over 150 to 250	570 min	340	16	-	-	-	163-217 (note 4)
Hot rolled + cold drawn or hot rolled + cold drawn + ground	-	6 to 13	710 min	565	6	-	-	530	-
Hot rolled + cold drawn or hot rolled + cold drawn + ground	-	over 13 to 16	690 min	555	7	-	-	510	-
Hot rolled + cold drawn or hot rolled + cold drawn + ground	-	over 16 to 40	660 min	525	8	-	-	460	-
Hot rolled + cold drawn or hot rolled + cold drawn + ground	-	over 40 to 63	650 min	510	9	-	-	400	-
Hot rolled + cold drawn or hot rolled + cold drawn + ground	-	over 63 to 76	620 min	480	9	-	-	380	-
Hardened and tempered + turned or ground	Q	6 to 100	625-775	415	18	30	35	385	179-229
Hardened and tempered + turned or ground	R	6 to 29	700-850	510	16	25	28	480	201-255
Hardened and tempered + turned or ground	S	6 to 19	775-925	570	14	25	28	555	223-277
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	Q	over 13 to 100	625-775	440	13	30	-	400	179-229 (note 4)
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	R	6 to 29	700-850	520	12	25	-	450	201-255 (note 4)
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	S	6 to 19	775-925	580	10	25	-	510	223-277 (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.

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

Table 3, category 1.

Source: BS 970 (Part 1):1983, Table 3