Alloy spring steels and stabilizer bars

Ori Martin is able to satisfy the most stringent specifications concerning micro cleanness, surface decarburization and absence of surface defects.
Ori Martin special steels are used for the production of spiral springs with two process: cold forming of an induction pre-tempered wire and hot forming. Also torsion and stabilizer bars are common field of application of such steel grade. 

Suitable for the production of coil springs and torsion bars used in the automobile and railway industries. These grades of steel must have a high yielding point and tenacity after quenching and tempering to withstand stress under flexi-torsion. 

Our refining and casting techniques enable us to achieve steel with good hardenability and a high level of micro-cleanliness. Using the controlled rolling process we obtain products with a very low decarburisation level, absence of surface defects, tight tolerances and excellent characteristics of wire plasticity.

Alloy spring steels and stabilizer bars

Steel grade

Steel grade Corresponding standard Average chemical composition
Werkstoff ORI Martin C Mn Si Cr Ni V
Si 38Si7 1.5023 D38S71 0,38 0,70 1,70 - - -
48Si7 1.5021 D50S72 0,48 0,65 1,80 - - -
51Si7 1.5025 D50S71 0,50 0,70 1,70 - - -
55Si8 D55S81 0,55 0,80 1,90 - - -
Mn 38Mn6 B36M61 0,29 1,50 0,20 - - -
Si Cr 54SiCr6 1.7102 D55S51 0,54 0,80 1,40 0,70 - -
56SiCr7 1.7106 D55S71 0,55 0,70 1,70 0,20 - -
61SiCr7 1.7108 D60F81 0,61 0,85 1,80 0,30 - -
Si Cr V 45SiCrV6-2 1.8151 D45F61 0,45 0,80 1,50 0,60 - 0,15
54SiCrV6 D56F71 0,54 0,70 1,40 0,70 - 0,10
61CrSiV5 1.2243 D61F72 0,61 0,75 0,85 1,15 - 0,10
65CrSiV7 D65F81 0,65 0,85 1,50 0,80 - 0,23
Mn Si Cr V 45MnSiCrV6 D45F66 0,45 1,30 1,40 0,60 - 0,15
Cr 55Cr3 1.7176 D55C31 0,55 0,80 0,30 0,80 - -
Cr V 50CrV4 1.8159 D50X41 0,50 0,80 0,30 1,00 - 0,15
58CrV4 1.8161 D58X41 0,58 0,90 0,30 1,00 - 0,15
Si Cr Ni 52SiCrNi5 1.7117 D52R51 0,52 0,85 1,35 0,85 0,60 -
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Products



ORI Martin S.p.A.
Wire rod

Rolling takes place at a controlled temperature using the very latest technology. This allows a smaller grain size to be obtained together with a more fine and even structure. Optimal characteristics for subsequent use in drawing and cold moulding in addition to a higher degree of globularisation after the annealing process.

Hot rolled round bars

Production takes place in a rolling mill at a controlled temperature using the very latest technology which guarantees a fine grain and homogeneous structure; the calibrator finishing block allows bars with restricted dimensional tolerances.

Induction tempered wire

A new IT wire line has been installed in Brescia’s plant, the final part of a fully integrated process from continuous casting of billet to rolling of wire rod. Coils are handled with the utmost care, so as to preserve and protect their surface.
ORI Martin Group is proud to offer a 100% controlled product, from raw materials to pre-tempered wire. 25 years of experience in the production of steel for suspension springs in the automotive sector have been one of the main reasons leading ORI Martin Group to invest in this new product. IT wire responds to the needs of cold coiled springs for high tensile strength and fatigue resistance. Pre-tempered wire can also be used in other different critical manufacturing fields.

Sales

Alberto Franchi

Export Sales Manager

Italy

Phone +39 030 3999 205

Alessandro Lombardi

Sales Manager Italy

Italy

Phone +39 030 3999 214

Alberto Petroboni

Sales Manager Italy

Italy

Phone +39 030 3999 272

Julia Seeber

Export Sales

Italy

Phone +39 030 3999 224


ORI Martin France Sarl

Sales

Michel Pham

France

Phone +33 3 873 610 90


ORI Martin Deutschland GmbH

Sales

Mario Gerth

Sales manager

Germany

Phone +49 203 318 77 16


Trafilati Martin S.p.A.
Peeled bars

Peeled bars from 17 to 80 mm.

Peeled bars from hot rolled bars can be produced with the following additional operations and controls:
- Heat treatment by annealing (soft and spheroidized annealing and so on)
- Heat treatment by quenching and tempering, normalising or stress reliving by induction
- Ends chamfering
- Surface defect control by Eddy Current
- Anti-mixing control
- Ultrasonic test


Peeled bars from hot rolled coil can be produced with the following additional operations and controls:
- Heat treatment by annealing (soft and spheroidized annealing and so on)
- Heat treatment by quenching and tempering, normalising or stress reliving by induction (after peeling)
- Ends chamfering
- Surface defect control by Eddy Current
- Anti-mixing control

Induction tempered wire

A new IT wire line has been installed in Brescia’s plant, the final part of a fully integrated process from continuous casting of billet to rolling of wire rod. Coils are handled with the utmost care, so as to preserve and protect their surface.
ORI Martin Group is proud to offer a 100% controlled product, from raw materials to pre-tempered wire. 25 years of experience in the production of steel for suspension springs in the automotive sector have been one of the main reasons leading ORI Martin Group to invest in this new product. IT wire responds to the needs of cold coiled springs for high tensile strength and fatigue resistance. Pre-tempered wire can also be used in other different critical manufacturing fields.

Sales

Massimo Modonesi

Sales manager Trafilati Martin

Italy

Phone +39 030 7058323


Novacciai Martin S.p.A.
Peeled & reeled bars

Peeled & reeled bars (+SH EN 10277)
Alloy Steel, Non-Alloy Steel and Stainless Steel
Ø 10,00 ÷ 200,00 ( ≥IT9 ) EN 10278

Sales

Mauro Rosti

Sales Manager

Italy

Phone +39 0321 530625

Simone Locati

Sales

Italy

Phone +39 0321 530605



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