BARE CROMATE STANDARD
Bare cromate standard
Diametre (domeniul metric): 6-200 mm
Diametre (domeniul imperial): 1/4″-8″ Produse si marci de otel:
- C35 E; Ck45
- 42CrMo4V
- 20MnV6 (*); 38MnVS6 – * Valoare energie de rupere: la cerere
Toleranta: ISO f7 (ISO h7 sau alta – la cerere)
Ovalitate: maximum 1/2 din valoarea intervalului de toleranta al diametrului
Lungimi standard: 6000 ±300 mm
Lungimi speciale: la cererea clientului Pot fi livrate la cerere lungimi fixe sau debitate.
Rugozitatea suprafetei: Ra – max. 0,20 µm (cel mai frecvent intre 0.10 si 0.15 µm)
Grosime strat de crom:
- < Ø 20 = min. 15 µm
- ≥ Ø 20 = min. 20 µm
Microduritate strat de crom: min. 950 HV0.1
Rectilinitate:
- Ø > Ø 16mm = max 0.2 mm/metru
- Ø ≤ Ø 16mm = max 0.3 mm/metru
Specificatii
Bare cromate standard. De la Ø 6 la 200 mm (In inch: 1/4″-8″)
COMPOZITIE CHIMICA, % DIN GREUTATE
| MARCA DE OTEL | C | Si | Mn | P (max) | S | Cr | Ni (max) | Mo | V | N |
|---|---|---|---|---|---|---|---|---|---|---|
| (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | |
| C35E | 0.32÷0.39 | max 0.4 | 0.50÷0.80 | 0.035 | 0.02÷0.04 | max 0.4 | 0.4 | max 0.1 | – | – |
| C45E | 0.42÷0.50 | max 0.4 | 0.50÷0.80 | 0.035 | max 0.035 | max 0.4 | 0.4 | max 0.1 | – | – |
| 20MnV6 | 0.15÷0.23 | 0.10÷0.50 | 1.30÷1.75 | 0.035 | max 0.035 | – | – | – | 0.1÷0.2 | – |
| 38MnVS6 | 0.34÷0.41 | 0.15÷0.80 | 1.20÷1.60 | 0.025 | 0.02-0.06 | max 0.3 | – | max 0.08 | 0.08÷0.2 | 0,01÷0,02 |
| 42CrMo4V | 0.38÷0.45 | max 0.4 | 0.60÷0.90 | 0.035 | max 0.035 | 0.9÷1.2 | – | 0.15÷0.30 | – | – |
Ptr. Ck45 si C35E: Cr+Mo+N i ≤ 0.63%
PROPRIETATI MECANICE
| MARCA DE OTEL (Starea probei) | Diametrul (Ø) | Rezistenta la rupere Rm | Limita de curgere Rp0.2 | Alungirea la rupereA5 |
|---|---|---|---|---|
| (mm) | – N/mm2 – | – N/mm2 – | – % min – | |
| C35E (stare normalizata) | Ø≤16 | Min.550 | min 300 | 18 |
| 16<Ø≤100 | Min.520 | min 270 | 19 | |
| 100<Ø≤250 | Min.500 | min 245 | 19 | |
| Ck45 (stare normalizata) | Ø≤16 | Min.620 | min 340 | 14 |
| 16<Ø≤100 | Min.580 | min 305 | 16 | |
| 100<Ø≤250 | Min.560 | min 275 | 16 | |
| 20MnV6 (stare normalizata) | 12<Ø≤25 | Min.580 | min. 450 | 18 |
| 25<Ø≤80 | Min.550 | min. 430 | 18 | |
| 80<Ø≤160 | Min.530 | min. 390 | 18 | |
| 38MnVS6 | 18≤Ø≤115 | Min.800 | min 520 | 12 |
| 42CrMo4V (calit si revenit) | Ø≤16 | Min.1100 | min 900 | 10 |
| 16<Ø≤40 | Min.1000 | min 750 | 11 | |
| 40<Ø≤100 | Min. 900 | min 650 | 12 | |
| 100<Ø≤160 | Min. 800 | min 550 | 13 | |
| 160<Ø≤250 | Min. 750 | min 500 | 14 |
rezistenta la coroziune
Rezultate teste de coroziune AASS si NSS efectuate conform ISO 9227:1990 si evaluate conform ISO 10289:1999.
| Diametru (mm) | Min Rating 9 (maxim 0.1% din suprafata cu puncte de coroziune) | |
|---|---|---|
| <18 | 72 ore NSS | 24 ore AASS |
| 18 la 200 | 120 ore NSS | 40 ore AASS |
| ISO 9227 | ASTM | DIN 50021 | Tip ceata salina |
|---|---|---|---|
| NSS | B 117 | SS | Neutra |
| AASS | B 287 | ESS | Acetica |
| CASS | B 368 | CASS | Cupro-acetica accelerata |
Corespondenta marci otel
| EN 10267 | Werkstoff No. | DIN | STAS 500 | AFNOR A36101 A35501 | B.S. 1449 4360 | UNI 7070 | JIS G3106 | GOST 380 19281 | AISI SAE ASTM |
|---|---|---|---|---|---|---|---|---|---|
| 19MnVS6 | 15217 | 20MnV6 | – | E420 | 55M | – | – | – | A572 |
| 38MnVS6 | 1.1303 | 38MnSiVS5 | – | 30MV6 | – | – | – | – | 1045V |
| EN 10083 | Werkstoff No. | DIN 17200 | STAS 880 | AFNOR NFA33101 35551 | B.S. 970 1449 | UNI 7845 8373 | JIS G4051 | GOST 1050 | AISI SAE ASTM |
| C45E | 11191 | Ck45 | OLC45X | 2C45, XC42H1 XC45, XC48H1 | 080M46 060A47 | C43 C46 | S45C S48C | 45 | 1045 |
| C35E | 11181 | Ck35 | OLC45X | C35, 2C35 XC32, XC38H1 | 080A35 (080M36) | C35 | S35C | 35 | 1035 |
| EN 10083 | Werkstoff No. | DIN 17200 | STAS 791 11500 | AFNOR NFA35552 NFA35551 | B.S. 970 | UNI 7845 7847 7846 | JIS G4051 G4052 G4104 | GOST 4543 | AISI SAE ASTM |
| 42CrMo4V | 17225 | 42CrMo4V | 42MoCr11 | 42CD4 42CrMo4V | 708A42 708M40 709M40 | 42CrMo4V | SCM440(H) | – | 4140 4142 |
