21CrMoV5-7 Forging Rolls For Our Czech Clients
These days, we receive some order of 21CrMoV5-7 Forging Rolls, 21CrMoV5.7 forged rolls For Our Czech Clients
Chemical compostion of 21CrMoV5-7 Forging Rolls is as followings
C
Si
Mn
Cr
Mo
Ni
W
V
P
S
Al
Mín. (Min.)
0,17
-
0,40
1,20
0,55
-
-
0,20
-
-
-
Máx. (Max.)
0,25
0,40
0,80
1,50
0,80
0,60
-
0,35
0,025
0,030
0,030
Mechanical property of 21CrMoV5.7 forged rolls is as following
TEMP.
(TEMP)
(YIELD STRENGTH, 0,2%,
min)
(TENSILE
STRENGTH)
.(ELONGATION in 50 mm,
min.), [%]
(REDUCTION
OF AREA, min.), [%]
(IMPACT)
[J]
(HARD NESS)
(GRAIN SIZE)
[oC]
[N/mm2]
[N/mm2]
LONGITUD.
(LONGITUD.)
TRANSV.
(TRANSV.)
LONGITUD.
(LONGITUD.)
TRANSV.
(TRANSV.)
LONGITUD.
(LONGITUD.)
TRANSV.
(TRANSV.)
[HB]
20
550
700-850
16
-
60
-
69
-
214 -
253
-
CHEMICAL
COMPOSITION) [%]
PHYSICAL AND MECHANICAL PROPERTIES)
Microstructure of 21CrMoV5.7 forged rolls : fine grain sized and homogeneous quenched and tempered microstructure- grain size 5-8 acc. ASTM 112.
Following is Serial production of our clients 21CrMoV5.7 forging rolls
• Surface: 100% visual testing
• Per heat or heat treatment batch one sample must be checked for mechanical properties,
Mechanical properties coordinated to the relevant cross section of the rolls
• 1 piece elongation test, 3 pieces ISO-V Tests, place of testing: lengthwise rolls
• Ultrasonic testing acc. SEP 1921, sample size: 10% or MT testing acc. to Item 5.1: sample size 10%
• Measurement control
Brinellhardness testing, sample size: 10%
FInish 21crmov5-7 forged rolls will be Marking with batch number and supplier symbol on not for machining designated area
