Grade 20CrMoVTiB4-10 / 1.7729

This European Standard specifies requirements for semi-finished products, bars and rods for fasteners with properties specified at elevated and/or low temperatures made of non-alloy and alloy (including stainless) steels and nickel alloys as given in Table 1. The requirements of this standard may be applied also to the finished fasteners. The general technical delivery conditions in EN 10021 also apply to products supplied in accordance with this European Standard.

Chemical Composition

Material designation		Chemical composition, % by mass
Element	Number	C	Si	Mn	P max.	S max.	Altot	B	Cr	Mo	Ni	V	Others
20CrMoVTiB4-10	1.7729	0,17 to 0,23	≤ 0,40	0,35 to 0,75	0,020	0,015 b	0,015 to 0,080	0,001 to 0,010	0,90 to 1,20	0,90 to 1,10	≤ 0,20	0,60 to 0,80	Ti: 0,07 to 0,15 As: ≤ 0,020 Sn: ≤ 0,020 Cu: ≤ 0,20

Mechanical Properties

Material designation		Heat treatment condition a	Diameter c (d mm)	Proof strength (Rp0,2 MPa min.)	Tensile strength (Rm MPa)	Elongation after fracture (A % min)	Reduction in area (Z % min)	Impact energy (ISO-V) at 20 °C (KV2 J min)
Name	Number
20CrMoVTiB4-10	1.7729	+QT	d ≤ 100	660	820 to 1 000	15	50	40
			100 < d ≤ 160	660	820 to 1 000	15	50	27