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C50 DIN 17200 Number: 1.0540 | Comparison of steel grades | |
JUS | Č.16301 | |
DIN | C50 | |
BS | - | |
GOST | - | |
AISI | - | |
UNI | - | |
NF | (AF70C55) |
Chemical analysis -% by mass* of C50 steel
Chemical elements | C | Si max. | Mn | P max. | S max. | Cr max. | Mo max. | Ni max. | Cr+Mo+Ni max. |
%, by mass | 0,47-0,55 | 0,40 | 0,60-0,90 | 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 controlpurposes. 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 and normalized and tempered conditions of C50 steel
Thickness of ruling section tR | |||||
Diameter in mm | tR≤ 100mm | 100 < tR≤250mm | 250 < tR≤500mm | 500 < tR≤1000mm | |
Remin (N/mm2) | 320 | 290 | - | - | |
Rmmin (N/mm2) | 610 | 590 | - | - | |
A % min. | l-longitudinal | 14 | 14 | - | - |
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 |
810 to 850 | Oil or water | 550 to 660 | 830 to 870 |
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