25crmo4 Bolts | EN 10269 Manufacturers Suppliers

25crmo4 Bolts

1.7218, G41300

25crmo4 Bolts are fasteners manufactured from alloy derived from carbon steel with additions of chromium and molybdenum. 25crmo4 Bolts have a tendency to withstand high temperature service applications. TorqBolt is an eminent 25crmo4 Alloy Steel fastener supplier in India.

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25crmo4 Bolts Properties

25crmo4 Bolts Chemical Requirements

Material designation Chemical composition, % by mass
Name Number C Si Mn P
max.
S
max.
Al tot B Cr Mo Ni V Others
25CrMo4 1.7218 0,22 to 0,29 ≤ 0,40 0,60 to 0,90 0.025 0.035 - - 0,90 to 1,20 0,15 to 0,30 - - -

25crmo4 Bolts Mechanical Requirements

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
25CrMo4 1.7218 +S 255 - -
+A 212 - -
+AC - 580 59

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.
25CrMo4 1.7218 +QT d ≤ 100 440 600 to 750 18 60 60
100< di 150 420 600 to 750 18 60 45

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
25CrMo4 1.7218 +QT d ≤ 100 435*) 428*) 420*) 412 392 363 333 304 275 235 - - -
100 < d ≤ 150 414*) 403*) 393*) 382 372 344 324 294 265 226 - - -

EN 10269 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
25CrMo4 1.7218 +QT d ≤ 60 - - - - - - - - - - 40 40 45 50 - 60
60 < d ≤ 100 - - - - - - - - - - - 40 40 50 - 60

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