20MnB5

20MnB5 EN 10083-3:2002, Number: 1.5530	Comparasion of steel grades
	JUS	-
	DIN	21MnB5
	BS	-
	GOST	-
	AISI	-
	UNI	-
	NF	-

Under EN10083-3:2002 standard 20MnB5 steel plate/sheet properties and heat treatment forgings, Including 20MnB5 application and specifications, We have all specifications，Including 20MnB5 bars, rod, Plate, bar, square steel, rectangular steel,forgings, BEBON STEEL can own production and sales.

20MnB5 STTEL PLATE Chemical analysis -% by mass

Chemical elements	C	Si	Mn	P	S	-	B
%, by masss	0,17 - 0,23	£ 0,40	1,10-1,40	max 0.025	max 0,035	-	0,0008-0,0050
Permissible deviation	± 0.02	± 0,03	± 0,05	+ 0.005	+ 0.005	-	± 0.03

20MnB5 STEEL SHEET Mechanical properties in the quen ched and tempered condition

	d ≤ 16mm oder t ≤ 8mm	16mm < d ≤ 40mm 8mm < t ≤ 20mm	40mm < d ≤ 100mm 20mm < t ≤ 60mm	100mm < d ≤ 160mm 60mm < t ≤ 100mm	160mm < d ≤ 250mm 100mm < t ≤ 160mm
Re min (MPa)	700	600	-	-	-
Rm (MPa)	900-1050	750-900	-	-	-
A min. (%)	14	15	-	-	-
Z min. (%)	55	55	-	-	-
KV min. (J)	60	60	-	-	-

Jominy’s hardenability band

Distance in mm from quenched end Hardness in HRC
mm		1,5	3	5	7	9	11	13	15	20	25	30	35	40	45	50
+H	max.	50	49	49	49	47	45	43	41	33	27	-	-	-	-	-
+H	min.	42	41	40	37	30	22	-	-	-	-	-	-	-	-	-

Heat treatment conditions – informative

Hardening temperature in the end quench test	Quenching temperature	Quenching in	Tempering temperature
9000±50C	880-920 0C	Voda (water)	400-600 0C

Tvrdoća u stanjima termičke obrade

Obrađeno za sposobnost sječenja u hladnom stanju (+S cold chesring) HB max.	Mekožareno (+A soft annealing) HB max.
- Shearable in the untreated condition	- Condition +A is not applicable for boron steels

Annex C (informativno) Reference valuse for the maximum diameter at a certain core hardness of steels with boron

Hardening temperature 0C	Core hardness * HRC	Approximate maximum diameter mm
		Water		Oil
900	34	32	25

For 80% martensite

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