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DIN 17200 C40 Number: 1.0511 | Comparison of steel grades | |
JUS | Č.14341 | |
DIN | C40 | |
BS | 080M40, EN8 | |
GOST | 40 | |
AISI | 1040 | |
UNI | C40, | |
NF | (AF60C40), (1C40) |
Chemical analysis -% by mass
Chemical elements | C | Si max. | Mn | P max. | S max. | Cr max. | Mo max. | Ni max. | Cr+Mo+Ni max. | |
%, by mass | 0,37-0,44 | 0,40 | 0,50-0,80 | 0,045 | 0,045 | 0,40 | 0,10 | 0,40 | 0,63 | - |
Permissible deviation | ± 0,02 | + 0,03 | ± 0,04 | + 0,005 | + 0,005 | + 0,05 | + 0,03 | + 0,05 | - |
At the option of the manufacturer the elements aluminium, titanium, vanadium and niobium may be added singly or in combination for grain size control purposes. Elements not quoted in table shall not be added to the steel without the agreement of the purchaser, except for the purpose of finishing the heat. Mechanical properties in the normalized conditions
Thickness of ruling section tR | |||||
Diameter in mm | tR≤ 100mm | 100 < tR≤250mm | 250 < tR≤500mm | 500 < tR≤1000mm | |
Remin (N/mm2) | 290 | 260 | - | - | |
Rmmin (N/mm2) | 550 | 530 | - | - | |
A % min. | l-longitudinal | 17 | 17 | - | - |
tr -transverse | - | - | - | - | |
KV min * (J) | l-longitudinal | - | - | - | - |
tr -transverse | - | - | - | - |
1N/mm2=1MPa Heat treatment conditions
Quenching Temperature,0C | Cooling medium | Tempering Temperature,0C | Normalizing temperature,0C |
830 to 870 | Water or oil | 550 to 660 | 850 to 890 |
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