C50R

C50R EN10083-2:2002, Number: 1.1241	Comparison of steel grades
	JUS	(Č.16303)
	DIN	(Cm50)
	BS	(080M50)
	GOST	-
	AISI	-
	UNI	-
	NF	-

Under EN10083-2:2002 standard C50R Alloy steel properties and heat treatment forgings, Including C50R Alloy steel application and specifications, We have all specifications，Including C50R Alloy steel bars, rod, Plate, bar, square steel, rectangular steel,forgings, BEBON CHINA can own production and sales.

C50R Alloy steel Chemical analysis -% by mass

Hemical elements	C	Si max.	Mn	P max.	S	Cr max.	Mo max.	Ni max.	Cr+Mo+Ni max.
%, by mass	0,47-0,55	0,40	0,60-0,90	0.025	0,020-0,040	0,40	0,10	0,40	0,63
Permissible deviation	± 0.02	+0,03	± 0,04	+ 0.005	± 0.005	+0,05	+0,03	+0,05	-

Jominy’s hardenability band

Distance in mm from quenched end Hardness in HRC (mm)
Symbol	mm		1	2	3	4	5	6	7	8	9	10	11	13	15	20	25	30
+H		max.	63	62	61	60	58	55	50	43	36	35	34	33	32	31	29	28
+H		min.	56	53	44	34	31	30	30	29	28	27	26	25	24	23	20	-

Tentative values for the ’’C’’ scale Rockwell hardness for special steel grades with restricted hardenability scatter bands (+HH and +Hl grades)

Symbol	Distance in mm from the quenched end HRC hardness
Symbol	1	4	5
+HH5 +HH15 +HL5 +HL15	-	-	40 to 58
	58 to 63	-	40 to 58
	-	-	31 to 49
	56 to 61		31 to 49

Maximum hardness for products to be supplied in the ’’treated to improve shearability (+S)’’ or ’’soft annealed (+A)’’ condition

+S (HB max.)	+A (HB max.)
255	217

Mechanical properties in the quenched and tempered condition (+QT)

	Mechanical properties for the ruling sections (see prEN10083-1:2002, Annex A) with a diameter (d) or for flat products trickness (t) of
	d ≤ 16mm t ≤ 8mm		16mm < d ≤ 40mm 8mm < t ≤ 20mm		40mm < d ≤ 100mm 20mm < t ≤ 60mm
Re min (MPa)	520	460		400
Rm (MPa)	750-900	700-850		650-800
A min. (%)	13	15		16
Z min. (%)	30	35		40
KV min. (J)	-		-		-

Mechanical properties in the normalized condition – (+N)

	Mechanical properties for products with a diameter (d) or, for flat products trickness (t) of
	d ≤ 16mm t ≤ 16mm		16mm < d ≤ 100mm 16mm < t ≤ 100mm		100mm < d ≤ 250mm 100mm < t ≤ 250mm
Re min. (MPa)	355	320		290
Rm min. (MPa)	650	610		590
A min. (%)	12		14		14

Heat treatment conditions

Quenching 0C	Quenching agent	Tempering temperature 0C	Hardening temperature in the end quench test 0C	Normalizing 0C
810-850	Oil or water	550-660	8500±5	830 to 890

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