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42CrMo4
EN 10250-3:1999, Number: 1.7225
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Comparison of steel grades
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JUS
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Č.4732
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DIN
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42CrMo4
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BS
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708A42, 709M40
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GOST
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38HM
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AISI
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4140, 4142
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UNI
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42CrMo4
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NF
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42CD4, 42CrMo4
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Chemical analysis -% by mass*
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Chemical elements
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C
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Si
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Mn
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P
max.
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S
max.
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Cr
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Mo
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-
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-
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%, by mass
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0,38- 0,45
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£ 0,40
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0,60 - 0,90
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0.035
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0.035
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0,90 -1,20
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0,15 – 0,30
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-
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Permissible deviation
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± 0,02
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+ 0,03
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± 0,04
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+ 0,005
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+ 0,005
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± 0,05
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± 0,03
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-
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-
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* At
the option the manufacturer the elements aluminium, titanium, vanadium and
niobium may be added singly or in combination for grain control
purposes. Elements not quoted in tables shall not be added intentionally to
the steel without the agreement of the purchaser, except for the purpose
of finishing the heat.
Mechanical properties in the
quenched and tempered condition
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Thickness of ruling
section tR
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Diameter in mm
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tR ≤
160mm
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160< tR
≤330mm
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330<tR≤660mm
XX
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Re min
(N/mm2)
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500
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460
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390
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Rm min
(N/mm2)
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750
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700
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600
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A % min.
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l-longitudinal
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14
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15
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16
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tr - transverse
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10
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11
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12
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KV min (J)
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l-longitudinal
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30
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|
27
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22
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tr - transverse
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16
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14
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12
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1N/mm2=1MPa
XX These properties apply only to a tR ≤
500mm
Heat treatment conditions****
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Quenching temperature,
0C
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Tempering temperature, 0C
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820 to 860
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540 to 680
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Zeljezara Niksic - Niksic, Montenegro
Phone: (+382) 20 234-616, (+382) 40 202 900 | Fax: (+382) 40 202-023
 | Website: www.znksteel.com
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