C45

Under EN 10250-2:1999 standard, C45 steel plate pipe has got ISO 9001:2000 International Quality control certificate .The C45 steel sheet Physico-chemical testing items for products of the plant include tensile test ,hardness test ,impact test ,flattening test ,and chemical composition analysis ,etc .C20,C45 steel pipes are manufactured by cold drawn process.

C45 EN 10250-2:1999, Number: 1.0503	Comparison of steel grades
	JUS	Č.1530
	DIN	C45
	BS	(080M46)
	GOST	45
	AISI	1043
	UNI	-
	NF	(AF65C45), CC45

C45 steel pipe Chemical analysis -% by mass

Chemical elements	C	Si max.	Mn	P max.	S max.	Cr max.	Mo max.	Ni max.	Cr+Mo+Ni max.
%, by mass	0,42-0,50	0,40	0,50-0,80	0,045	0,045	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		-

At the option of the manufacturer the elements aluminium, titanium, vanadium and niobium may be added singly or in combination for grain size control purposes. Elements not quoted in table shall not be added to the steel without the agreement of the purchaser, except for the purpose of finishing the heat. Mechanical properties in the normalized and normalized and tempered conditions

Thickness of ruling section tR
Diameter in mm		tR ≤ 100mm	100< tR ≤250mm	250< tR ≤500mm	500< tR ≤1000mm
Re min (N/mm2)		305	275	240	230
Rm min (N/mm2)		580	560	540	530
A % min.	l-longitudinal	16	16	16	15
A % min.	tr -transverse	-	12	12	11
KV min * (J)	l-longitudinal	-	18	15	12
KV min * (J)	tr -transverse	-	10	10	10

1N/mm2=1MPa Maksimim hardness for forgings to be supplied in the annealed condition

HB max 207

Heat treatment conditions

Quenching Temperature, 0C	Cooling medium	Tempering Temperature, 0C	Normalizing temperature, 0C
820 to 860	Water or oil	550 to 660	840 to 880

C45 EN 10083-2:2002, Number: 1.0503	Comparison of steel grades
	JUS	Č.1530
	DIN	C45
	BS	(080M46)
	GOST	-
	AISI	1043
	UNI	C45
	NF	CC45, (AF65C45)

Chemical analysis -% by mass

Chemical elements	C*	Si max.	Mn	P max.	S max.	Cr max.	Mo max.	Ni max.	Cr+Mo+Ni* max.
%, by mass	0,42-0,50	0,40	0,50-0,80	0.045	0,045	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	-

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	207

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)	490	430	370
Rm (MPa)	700-850	650-800	630-780
A min. (%)	14	16	17
Z min. (%)	35	40	45
KV min. (J)	-	-	-

Re:Upper yield strenght or, if on yield phenomenos occurs, the 0,2% proof strenght Rρ0,2.
Rm: Tensile strenght Mechanical properties in the normalized condition – (+N)

	Mechanical properties for products with a diameter (d) or, for flat products, a trickness (t) of
	d ≤ 16mm t ≤ 16mm	16mm < d ≤ 100mm 16mm < t ≤ 100mm	100mm < d ≤ 250mm 100mm < t ≤ 250mm
Re min. (MPa)	340	305	275
Rm min. (MPa)	620	580	560
A min. (%)	14	16	16

Heat treatment conditions

Quenching, 0C	Quenching agent	Tempering, 0C	Normalizing, 0C
820-860	Water or oil Oil or water	550-660	840 to 900

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