BS 970 (Part 1):1983 945M38 Steel: Specifications & Listings

Residual elements: see clause 1.7.3.

Source: BS 970 (Part 1):1983, clause 1.7.2.1

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
R	250	700-850	495	15	25	28	480	201-255
R	150	700-850	525	17	40	50	510	201-255
S	100	775-925	585	15	40	50	570	223-277
T	63	850-1000	680	13	40	50	665	248-302
U	29	925-1075	755	12	35	42	740	269-331
V	29	1000-1150	850	12	35	42	835	293-352

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
Hardened and tempered + turned or ground	R	over 150 to 250	700-850	495	15	25	28	480	201-255
Hardened and tempered + turned or ground	R	over 100 to 150	700-850	525	17	40	50	510	201-255
Hardened and tempered + turned or ground	S	over 63 to 100	775-925	585	15	40	50	570	223-277
Hardened and tempered + turned or ground	T	over 29 to 63	850-1000	680	13	40	50	665	248-302
Hardened and tempered + turned or ground	U	6 to 29	925-1075	755	12	35	42	740	269-331
Hardened and tempered + turned or ground	V	6 to 29	1000-1150	850	12	35	42	835	293-352
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	R	over 100 to 150	700-850	540	13	40	50	525	201-255
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	S	over 63 to 100	775-925	600	11	40	50	585	223-277
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	T	over 29 to 63	850-1000	700	10	40	50	680	248-302
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	U	6 to 29	925-1075	770	9	35	42	755	269-331
Hardened and tempered + cold drawn or hardened and tempered + cold drawn + ground	V	6 to 29	1000-1150	865	9	35	42	850	293-352
Turned, ground or cold drawn and finally softened	-	-	-	-	-	-	-	-	277 max

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.

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