| C55R EN 10083-2:2002, Number: 1.1209 | Comparison of steel grades | |
| JUS | Č.1680 | |
| DIN | (C55R, Cm55) | |
| BS | (070M55) | |
| GOST | 55 | |
| AISI | (1055) | |
| UNI | - | |
| NF | (XC55H1) | |
Under EN10083-2:2002 standard C55R steel plate/sheet properties and heat treatment forgings, Including C55R steel application and specifications, We have all specifications，Including C55R bars, rod, Plate, bar, square steel, rectangular steel,forgings, BEBON STEEL can own production and sales.
C55R STEEL PLATE Chemical analysis -% by mass
| Chemical elements | C | Si max. |
Mn | P max. | S1 max. |
Cr max. |
Mo max. |
Ni max. |
Cr+Mo+Ni max. |
| %, by mass | 0,52-0,60 | 0,40 | 0,60-0,90 | 0.025 | 0,035 | 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 | - |
| Distance in mm from quenched end Hardness in HRC | |||||||||||||||||||
| Symbol | mm | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 13 | 15 | 20 | 25 | 30 | ||
| +H | max. | 65 | 64 | 63 | 62 | 60 | 57 | 52 | 45 | 37 | 36 | 35 | 34 | 33 | 32 | 30 | 29 | ||
| min. | 58 | 55 | 47 | 37 | 33 | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 22 | 20 | |||
Tentative values for the ’’C’’ scale Rockwell hardness for special steel grades with restricted hardenability scatter bands (+HH and +Hl grades)
| Symbol | Distance in mm from the quenched end HRC hardness | ||
| 1 | 4 | 5 | |
| +HH5 +HH15 +HL5 +HL15 | - | - | 42 to 60 |
| 60 to 65 | - | 42 to 60 | |
| - | - | 33 to 51 | |
| 58 to 63 | - | 33 to 51 | |
Maximum hardness for products to be supplied in the ’’treated to improve shearability (+S)’’ or ’’soft annealed (+A)’’ condition
| +S (HB max.) | +A (HB max.) |
| 255 | 229 |
Mechanical properties in the quenched and tempered condition (+QT)
| Mechanical properties for the ruling sections (see prEN10083-1:2002, Annex A) with a diameter (d) or for flat products trickness (t) of | |||||
| d ≤ 16mm t ≤ 8mm | 16mm < d ≤ 40mm 8mm < t ≤ 20mm | 40mm < d ≤ 100mm 20mm < t ≤ 60mm | |||
| Re min (MPa) | 550 | 490 | 420 | ||
| Rm (MPa) | 800-950 | 750-900 | 700-850 | ||
| A min. (%) | 12 | 14 | 15 | ||
| Z min. (%) | 30 | 35 | 40 | ||
| KV min. (J) | - | - | - | ||
Mechanical properties in the normalized condition – (+N)
| Mechanical properties for products with a diameter (d) or, for flat products trickness (t) of | |||||
| d ≤ 16mm t ≤ 16mm | 16mm < d ≤ 100mm 16mm < t ≤ 100mm | 100mm < d ≤ 250mm 100mm < t ≤ 250mm | |||
| Re min. (MPa) | 370 | 330 | 300 | ||
| Rm min. (MPa) | 680 | 640 | 620 | ||
| A min. (%) | 11 | 12 | 12 | ||
Hardness of surface hardened zones for special steels intended for flame and induction hardening
| HRC min. 58 |
Heat treatment conditions
| Quenching 0C | Quenching agent | Tempering temperature 0C | Hardening temperature in the end quench test 0C | Normalizing 0C |
| 805-840 | Oil or water | 550-660 | 8300±5 | 825 to 885 |
Source:
Tags: C55R
