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  5. 40CrMoV4-6 Bolts Specification

40CrMoV4-6 Bolting Specification

Fasteners, Stud Bolts, Screws, Nuts, Washers

Scope

EN 10269 40CrMoV4-6 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.

Related Specifications of 40CrMoV4-6 Bolting

DIN 267 ISO 3506-5 BS EN 10088-3

40CrMoV4-6 Chemical composition

Cast Analysis A

Material designation Chemical composition, % by mass
Name Number C Si Mn P
max.		 S
max.		 Al tot B Cr Mo Ni V Others
40CrMoV4-6 1.7711 0,36 to 0,44 ≤ 0,40 0,45 to 0,85 0.025 0.030 ≤ 0,015 - 0,90 to 1,20 0,50 to 0,65 - 0,25 to 0,35 -

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 Mechanical properties

Mechanical properties at Room Temperature

Mechanical properties at room temperature for delivery conditions normally applied for further processing

Material designation Heat treatment condition a,b Hardness
HBW
max.		 Tensile strength
Rm
MPa
max.		 Reduction in area
Z
%
min.
Name Number
40CrMoV4-6 1.7711 +A 241 - -

Mechanical properties at room temperature and at 20 °C 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 Proof strength Tensile strength Elongation after fracture Reduction in area Impact energy (ISO-V) at 20°C
Name Number
d
mm		 Rp0,2
MPa min.		 Rm
MPa		 A
%
min.		 Z
%
min.		 KV2
J
min.
40CrMoV4-6 1.7711 +QT d ≤ 100 700 850 to 1 000 14 45 40
100 < d ≤ 150 640 850 to 1 000 14 45 40

EN 10269 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
40CrMoV4-6 1.7711 +QT d ≤ 100 687*) 670 647 631 608 593 577 554 523 470 400 293 -
100 < d ≤ 160 631*) 612 591 577 556 542 528 507 479 429 366 268 -

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.

EN 10269 40CrMoV4-6 Bolting Certifications

  • EN 10204 3.1
  • EN 10204 3.2
  • PED 2014/68/EC
  • MERKBLATT AD 2000 W2/W7/W10
  • API 20 E BSL 1/ BSL 2
  • NACE MR 0175
  • NACE MR 0103