EN 10269 X6NiCrTiMoVB25-15-2 | 1.4980 Bolting Specification

Fasteners, Stud Bolts, Screws, Nuts, Washers

Scope

EN 10269 X6NiCrTiMoVB25-15-2 Specification is a European Standard that 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.
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.
NOTE : Once this European Standard is published in the EU Official Journal (OJEU) under Directive 97/23/EC, presumption of conformity to the Essential Safety Requirements (ESRs) of Directive 97/23/EC is limited to technical data of materials in this European Standard and does not presume adequacy of the material to a specific item of equipment. Consequently, the assessment of the technical data stated in this material standard against the design requirements of this specific item of equipment to verify that the ESRs of Directive 97/23/EC are satisfied, needs to be done.

EN 10269 X6NiCrTiMoVB25-15-2 | 1.4980 Chemical composition

Permissible product analysis tolerances on the limiting values given in for the cast analysis

Element(s)	Specified limits, cast analysis % by mass	Permissible tolerance a % by mass
C	< 0,03	± 0,005
	≥ 0,03 ≤ 0,20	± 0,01
	> 0,20 ≤ 0,50	± 0,02
Si	≤ 0,40	± 0,03
	> 0,40 ≤ 1,00	± 0,05
Mn	≤ 2,00	± 0,04
	> 2,00 ≤ 7,0	± 0,10
P	≤ 0,045	+0.005
S	≤ 0,015	+0.003
	> 0,015 ≤ 0,035	+0.005
N	≤ 0,040	± 0,005
	> 0,040 ≤ 0,18	± 0,01
Al	≥ 0,015 ≤ 0,08	+0,01 -0,005
	> 0,08 ≤ 0,35	± 0,05
	> 0,35 ≤ 1,80	± 0,10
B	≤ 0,010	± 0,000 5
	> 0,010 ≤ 0,10	± 0,005
Cr	≤ 2,00	± 0,05
	> 2,00 < 10,0	± 0,10
	≥ 10,0 < 15,0	± 0,15
	≥ 15,0 ≤ 21,0	± 0,20
Cu	≤ 0,50	+0.05
	> 0,50 ≤ 4,0	± 0,10
Mo	≤ 0,60	± 0,03
	> 0,60 < 1,75	± 0,05
	≥ 1,75 ≤ 3,00	± 0,10
Ni	≤ 1,00	± 0,03
	> 1,00 ≤ 5,0	± 0,07
	> 5,0 ≤ 10,0	± 0,10
	> 10,0 ≤ 20,0	± 0,15
	> 20,0 ≤ 27,0	± 0,20
Cr+Mo+Ni	≤ 0,63	+0.05
Nb	≤ 1,25	± 0,05
Nb+Ta	≥ 0,70 ≤ 1,20	± 0,10
Ti	≤ 0,15	± 0,01
	> 0,15 ≤ 1,00	± 0,05
	> 1,00 ≤ 2,75	± 0,10
V	≤ 0,05	± 0,01
	> 0,05 ≤ 0,80	± 0,03
As	≤ 0,020	± 0,003
Sn	≤ 0,020	± 0,003
Feb	≤ 1,50	+0.05
	> 1,50 ≤ 9,0	± 0,10
a If several product analyses are carried out on one cast, and the contents of an individual element determined lie outside the permissible range of the chemical composition specified for the cast analysis, then it is only allowed to exceed the permissible maximum value or to fall short of the permissible minimum value, but not both for one cast. b For nickel alloys.

EN 10269 X6NiCrTiMoVB25-15-2 | 1.4980 Mechanical properties

EN 10269 X6NiCrTiMoVB25-15-2 | 1.4980 Proof strength

Minimum 0,2 %-proof strength values at elevated temperature of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC d

Material designation		Heat treatment condition a	Diameter e d mm	Minimum 0,2 %-proof strength Rp0,2 in MPa at a temperature (in °C) of:
Name	Number			50	100	150	200	250	300	350	400	450	500	550	600	650
X6NiCrTiMoVB25-15-2	1.4980	+AT+P	d ≤ 160	592*)	580	570	560	550	540	530	520	510	490	460	430	380
a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened; +QT = quenched and tempered; +WW = warm worked (see Annex B). b This steel grade is generally not applied in the creep range. c Values in brackets signify that the steel is not intended for use (and testing) at those temperatures. d Products made to these steel grades and these final heat treatment conditions support the Essential Safety Requirements of Directive 97/23/EC; see Annex 1, 7.5 of this directive. e For rectangular cross sections "d" will be replaced by "b" (see Figure 1). *) Values calculated by linear interpolation.

EN 10269 X6NiCrTiMoVB25-15-2 | 1.4980 Tensile Strength

Minimum tensile strength values at elevated temperatures of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC b

Material designation		Heat treatment condition a	Diameter c d mm	Minimum tensile strength Rm in MPa at a temperature (in °C) of:
Name	Number			50	100	150	200	250	300	350	400	450	500	550	600	650
X6NiCrTiMoVB25-15-2	1.4980	+AT+P	d ≤ 160	-	-	-	-	-	-	-	720	710	700	690	670	-
a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened; +QT = quenched and tempered; +WW = warm worked (see Annex B). b Products made to these steel grades and these final heat treatment conditions support the Essential Safety Requirements of Directive 97/23/EC; see Annex 1, 7.5 of this directive. c For rectangular cross-sections "d" will be replaced by "b"

EN 10269 X6NiCrTiMoVB25-15-2 | 1.4980 Impact Energy

Minimum impact energy (longitudinal direction) at low temperature of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC b

Material designation		Heat treatment condition a	Diameter e d mm	Minimum impact energy KV2 in J c (ISO-V test piece) at a test temperature in °C of:
Name	Number			-270	-196	-160	-140	-120	-110	-100	-90	-80	-70	-60	-50	-40	-20	0	+20
X6NiCrTiMoVB25-15-2	1.4980 d	+AT+P	d ≤ 160	-	40	-	-	-	-	-	-	-	-	-	-	-	-	-	50
a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened; +QT = quenched and tempered; +WW = warm worked (see Annex B). b Products made to these steel grades and these final heat treatment conditions support the Essential Safety Requirements of Directive 97/23/EC; see Annex 1, 7.5 of this directive. c Average of 3 test results. d Steel grade 1.4980 may be ordered for cryogenic purposes with impact values of 50 J at -270 °C, 60 J at -196 °C and 70 J at 20 °C. e For rectangular cross sections "d" will be replaced by "b"

Tests

Verification tests to be carried out and extent of testing

Test		Test statusa	Number of samples for batches of			Number of test pieces per sample
			≤ 10 t	> 10 t to ≤ 15 t	> 15 t
Chemical analysis	cast	m	1/cast (see 8.3.1 and 11.1)
	product	Ob	(see 10.1.1)
Hardness test on homogeneity / shearing		Oc	(see 10.1.2 and 10.2.1.3)
Intergranular corrosion resistance		Oc	(see 11.6.5)
Tensile test at room temperature		m	2	3	4	1
Tensile test at elevated temperature		Od				1
Impact test at room temperature		Me				3
Impact test at low temperature		Of				3
Non-destructive testing		Og	not applicable
Verification of surface quality		o
Other tests		Mh
a Tests marked with a 'm' (mandatory) shall be carried out. In all cases, those marked with an 'o' (optional) shall be carried out as specific tests only if agreed at the time of enquiry and order. b •• A product analysis (per cast) may be agreed at the time of enquiry and order; additionally a deviating extent of testing may be agreed. c • The number of samples and test pieces per sample shall be agreed at time of enquiry and order. d •• For verification of Rp0,2 and, in the case of austenitic steels and nickel alloys, of the tensile strength at elevated temperatures for products to be used at elevated temperatures. e •• Optional for austenitic steels, except austenitic grades for cryogenic service (> 15 mm diameter or thickness). f •• For materials for use at low temperatures. g For verification of internal soundness.