الوصف

We produce screws and stud bolts in A**3 B8 and  stud bolts in A**0 B8 . This is a NI-Cr austenitic not tempered stainless steel,  hardening through cooling warping  at better workability.

This material is mainly used for the equipments of food production and preservation, in chemical industry and in architectonic and cars features. 

At solubled status, it is corrosion resistant to several substances of chemical, textile, oil, dayring and food industries.

Considering the less content of carob steel, the type **4 is less subject to intercrystalline corrosion than type **2.
We recommend to avoid slow cooling and heating processes between ******0°C-

A**3 B8 and A**0 B8 has a good heat oxidation resistance up to **0°C in current on order conditions, upto **0°C  in in fitful on-order conditions. It can be welded without any particular problem, but we recommend not to use austenitic steel electrodes types AISI **8 or **7. The after-welding treatment is not necessary when the welded sections have a thickness lower than *5mm.

Nuts for bolts in ASTM A**3 B8 and ASTM A**0 B8 : A**4 grade 8 

We produce screws and stud bolts in A**3 B8M  and  A**0 B8M. This is a NI-Cr austenitic not tempered stainless steel,  hardening through cooling warping. It has a higher corrosion resistance than the type **4 regarding the  pitting caused by chloride ions.

A**3 B8M and A**0 B8M is mainly used in equipments for vessels, chemical, pharmaceutical, photographic, food, textile and paper industry, parts of furnaces, heat exchangers and orthopaedic.

The corrosion resistance is excellent in atmosphere and in great variety of salts,  organic acids and foods substances; it is quite goods regarding poor solutions of reducing acids, better with respect to other austenitic steels without Mo, to halides and to sea water.

Given the low content of carbon steel , the type **6L is slight susceptible to intercrystalline corrosion, anyway we recommend to avoid the slow heating and cooling between ******0°C.

The after-welding treatment is not necessary when the welded sections have a thickness lower than *5mm.

Nuts for bolts in ASTM A**3 B8M and ASTM A**0 B8M : A**4 grade 8M 

ASTM A**3 B8M Class 1 Stainless steel, AISI **6L, carbide solution treated.

ASTM A**3 B8M Class 2 Stainless steel, AISI **6L, carbide solution treated, strain hardened