Contarini Leopoldo Srl

Contarini Leopoldo Srl 

Z.I. via A. Volta, 34 

I – 48022 Lugo (Ravenna) Italia 

TEL +39 0545 281111 FAX +39 0545 281114 

Home page : www.contarini.net 

E-mail:mbox@contarini.net 

P.I e COD FISC 00096710397 UNI EN ISO 9001 - 2000 

Reg. n°533-A 

CHROME PLATED BARS 

STEEL 

UNI C-45 : similar to DIN CK45 - SAE 1045– F114 - AFNOR XC42TS - BS 080M40 (EN8) 

CARBON STEEL NORMALIZED 

EVEN FOR INDUCTION HARDENED AND TEMPERED 

20MnV6 : similar to 18MnV5 : STE 460 

MICRO-ALLOYED VANADIUM STEEL NORMALIZED 

HIGHER YIELD AND BETTER CHARACTERISTICS 

OF WELDABILITY AND WORK 

UNI C-50 : similar to DIN CF53 : SAE 1050 

CARBON STEEL NORMALIZED 

PARTICULARLY SUITABLE TO INDUCTION HARDENED AND TEMPERED 

42CRMo4 : similar to DIN 42CrMo4V : SAE 4140 

MID-ALLOYED HARDENED AND TEMPERED STEEL USED FOR MECHANICAL STRESSED PARTS 

AND AVAILABLE ALSO AS INDUCTION HARDENED AND TEMPERED STEEL 

DIMENSIONAL RANGE 

FROM DIAMETER 8 mm TO DIAMETER 500 mm 

MATERIAL STATE 

NATURAL , HARDENED, HARDENED AND TEMPERED, DRAWN HARDENED AND TEMPERED 

TOLERANCES 

ISO f7 : ISO h7 : ISO h6 

CHROME THICKNESS 

NORMAL SERIES : 25 ± 5 micron 

HEAVY DUTY SERIES : 50 ± 5 micron 

CILINDRI E COMPONENTI OLEODINAMICI




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Reg. n°533-A 

SURFACE ROUGHNESS 

Ra MAX 0.20 micron : Rt MAX 3.00 micron 

CHROME PLATING HARDNESS 

Hv 0.1/Hv 800-1000 

STRAIGHTNESS 

BETTER THAN 0.5/2000 mm 

OVALIZATION 

WITHIN 1/2 OF THE TOLERANCE 

CONCENTRICITY 

ALL TYPES ± 2 micron 

CORROSION RESISTANCE 

TEST ACCORDING TO NSS ISO 3768 AND ASS ISO 3769 

RESULT RATING ACCORDING TO ISO 4540 

100h LIFE STANDARD TYPE , RATING MEDIUM 9 

WE CAN ALSO SUPPLY HIGHER RESISTANT MATERIALS 

PACKING 

EACH BAR IS PROTECTED WITH A PLASTIC SHEATH 

TEST 

VISUAL; DIMENSIONAL; MECHANICAL ; 

CHYMICAL ANALYSIS; CERTIFICATION ACCORDING TO 

DIN 50049/3.1.B DIN 50049/2.1/2.2 

STEEL C% Mn% Si% Cr% Mo% V% S% (max) P% (max) 

20MnV6 0,20 1,50 0,30 - - 0,10 0,25 0,025 

UNI C45 0,45 0,70 - - - - 0,030 0,030 

42CrMO4 0,42 0,70 0,25 1,00 0,20 - 0,025 0,025 


STEEL Ø mm 

20MnV6 

UNI C45 

42CrMO4 




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Reg. n°533-A 

Yield 

S 0,2 

N/mm² 

Yield point 

Rm N/mm² 

Elongation 

%a5 

Impact Strength Weldability 

8-20 >510 >16 >16 60 27 excellent 

>20-80 >440 550-700 >19 60 27 excellent 

>80-120 >440 550-700 >19 40 27 excellent 

>120-200 >380 500-700 >16 40 20 excellent 

20-10 >340 580-800 >17 - good 

>100-200 >320 520-680 >15 - good 

12-120 >735 900-1150 >14 Kcu>34 jolie good 

>120-200 >680 900-1150 >14 Kcu>34 jolie good 





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Reg. n°533-A 

WELDED DRAWN POLISHED TUBES, READY TO USE 

STEEL 

UNI FE 510 : DIN St 52.3 

TYPE OF SUPPLY 

WELDED AND DRAWN IN REACTIVE OIL 

TAPPED AND DEBURRED EXTREMITIES 

INTERNALLY AND EXTERNALLY OILED 

STATE OF SUPPLY 

COLD DRAWN/HARD (BK) 

TOLERANCES 

ON EXTERNAL DIAMETER : AS PER DIN 2393 

ON INTERNAL DIAMETER : AS PER ISO H9 

ROUNDNESSS 

WITHIN THE TOLERANCES ON THE DIAMETER 

ROUGHNESS 

Ra 0.8u AS PER ASTM A513 OR ISO 468 

STRAIGHTNESS 

1 mm /1000 mm 

MECHANICHAL FEATURES: 

RUPTURE : MIN 600 N/mm² 

YIELD : MIN 540/mm² 

ELONGATION : Ap5 MIN 5% 

HRB : MIN 90 

TESTS: 

VISUAL; DIMENSIONAL; MECHANICAL TESTS; 

CHEMICAL ANALYSIS; NOT DESTRUCTIVE TESTS 100%; 

CERTIFICATION AS PER DIN 50049/3.1B 


Ø i (mm) 

18. 1÷30 

30. 1÷50 

50. 1÷80 

80. 1÷120 

120. 1÷180 




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Reg. n°533-A 

ISO TOLERANCES ON INTERNAL DIAMETER 

H 8 H 9 H 10 H 11 

+0,033 

-0 

+0,039 

-0 

+0,046 

-0 

+0,054 

-0 

+0,063 

-0 

+0,033 

-0 

+0,062 

-0 

+0,074 

-0 

+0,087 

-0 

+0,100 

-0 

+0,084 

-0 

+0,100 

-0 

+0,120 

-0 

+0,140 

-0 

+0,160 

-0 

CILINDRI E COMPONENTI OLEODINAMICI 

+0,130 

-0 

+0,160 

-0 

+0,190 

-0 

+0,220 

-0 

+0,250 

-0




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Reg. n°533-A 

SEAMLESS DRAWN TUBES 

HONED OR INTERNALLY ROLLED 

STEEL 

UNI FE 510 D : DIN St 52.3 : SAE 1026 


SEEMLESS COLD DRAWN 

HONED OR INTERNALLY ROLLED 


EXTERNALLY AND INTERNALLY OILED 


STRESS RELIEVED (BK+S) 

TOLERANCES 

ON EXTERNAL DIAMETER : AS PER DIN 2391 

ON INTERNAL DIAMETER : AS PER ISO H8 

ROUNDNESS 

WITHIN THE TOLERANCES ON THE DIAMETER 

ROUGHNESS 

Ra MAX 0.4u AS PER ASTM A513 OR ISO 468 

STRAIGHTNESS 

1 mm /1000 mm 

MECHANICAL FEATURES 

BREAKING : MIN 580 N/mm² 

YIELD : MIN 520/mm² 

ELONGATION : Ap5 MIN 15% 

TESTS 

VISUAL; DIMENSIONAL; MECHANICAL TESTS; 

CHEMICAL ANALYSIS; NOT DESTRUCTIVE TESTS 100%; 

CERTIFICATION AS PER DIN 50049/3.1B 





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Reg. n°533-A 

TOLERANCES ON EXTERNAL DIAMETER 

40 - 90 +/- 0.30 

100 - 120 +/- 0.40 

120 - 180 +/- 0.50 

Ø i (mm) 

18. 1÷30 

30. 1÷50 

50. 1÷80 

80. 1÷120 

120. 1÷180 

ISO TOLERANCES ON INTERNAL DIAMETER 

H 8 H 9 H 10 H 11 

+0,033 

-0 

+0,039 

-0 

+0,046 

-0 

+0,054 

-0 

+0,063 

-0 

+0,033 

-0 

+0,062 

-0 

+0,074 

-0 

+0,087 

-0 

+0,100 

-0 

+0,084 

-0 

+0,100 

-0 

+0,120 

-0 

+0,140 

-0 

+0,160 

-0 

CILINDRI E COMPONENTI OLEODINAMICI 

+0,130 

-0 

+0,160 

-0 

+0,190 

-0 

+0,220 

-0 

+0,250 

-0




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Reg. n°533-A 

SEAMLESS DRAWN TUBE FOR HYDRAULIC CIRCUITS 

STEEL 

UNI FE 360 D : DIN St 37.4 


SEAMLESS COLD DRAWN 


EXTERNALLY AND INTERNALLY OILED 

BONDERIZED AND ZINC-PLATED 


NORMALIZED (NBK) 

TOLERANCES 

INTERNAL DIAMETRE DIN 1630

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