Under EN 10250-2:1999 standard, C40 steel plate pipe has got ISO 9001:2000 International Quality control certificate .The C40 pipe Physico-chemical testing items for products of the plant include tensile test ,hardness test ,impact test ,flattening test ,and chemical composition analysis ,etc .C20,C45steelpipes are manufactured by cold drawn process.
| C40 EN 10250-2:1999, Number: 1.0511 | Comparison of steel grades | |
| JUS | Č.14341 | |
| DIN | C40 | |
| BS | 080M40, EN8 | |
| GOST | 40 | |
| AISI | 1040 | |
| UNI | C40, | |
| NF | (AF60C40), (1C40) | |
C40 steel pipe 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 | |
| Re min (N/mm2) | 290 | 260 | - | - | |
| Rm min (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 |
Source:
Tags: C40
