Under EN10084-1998 standard C18CrMoS4 Alloy steel properties and heat treatment forgings, Including 18CrMoS4 Alloy steel application and specifications, We have all specifications，Including 18CrMoS4 Alloy steel bars, rod, Plate, bar, square steel, rectangular steel,forgings, BEBON CHINA can own production and sales.

18CrMoS4 steel plate Chemical composition (cast analysis)

Chemical elements	C	Si max	Mn	P max.	S	Cr	Mo	-
%, by mass	0,15-0,21	0,40	0,60-0,90	0,035	0,020-0,040	0,90-1,20	0,15-0,25	-
Permissible deviation	± 0,02	+ 0,03	± 0,04	+ 0,005	± 0,005	± 0,05	± 0,03	-

18CrMoS4 steel sheet Hardness limits for steel

Hardness HRC at a distance from quenched end of test piece (in milimetres) of
mm		1,5	3	5	7	9	11	13	15	20	25	30	35	40	45	50
+H	max.	47	46	45	42	39	37	35	34	31	29	28	27	26	-	-
+H	min.	39	37	34	30	27	24	22	21	-	-	-	-	-	-	-
+HH	max.	47	46	45	42	39	37	35	34	31	29	28	27	26	-	-
+HH	min.	42	40	38	34	31	28	26	25	22	20	-	-	-	-	-
+HL	max.	44	43	41	38	35	33	31	30	27	25	24	23	22	-	-
+HL	min.	39	37	34	30	27	24	22	21	-	-	-	-	-	-	-

Hardness requirements for products delivered in the conditions ’’treated to improve shearabilita’’ (+S), ’’anneled to maximum hardness requirements’’ (+A), ’’treated to hardness range’’ (+TH) or ’’treated to ferrite-pearlite structure and hardness range’’ (+FP)

Brinell hardness in the condition
+S max.	+A max.	+TH		+FP
		min.	max.	min.	max.
*	207	156	207	140	187

Non-metallic inclusions Requirements for microscopic degree of purity when tested in accordance with DIN 50 602 (method K) (valid for oxidic non-metallic inclusions)

D (mm) Bars Diameter d (mm)	K Total characteristic value K (oxides) for the individual cast
140 < d 200	K 4 ≤ 50
100 < d ≤ 140	K 4 ≤ 45
70 < d ≤ 100	K 4 ≤ 40
35 < d ≤ 70	K 4 ≤ 35
17 < d ≤ 35	K 3 ≤ 40
8 < d ≤ 17	K 3 ≤ 30
d ≤ 8	K 2≤ 35

Conditions for heat treating test bars and treatment of the steels

End quenchh test Quenching, 0C	Carbunnzing temperature, 0C	Core-hardening temperature, 0C	Case-hardening temperature, 0C	Tempering, 0C
880	880 to 980	860 to 900	780 to 820	150 to 200

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