DIN 975 bolt grade ASTM A193 B6 B8 B8m B7 B7m

                     Stud bolt DIN 975 grade ASTM A193 B6 B8 B8m B7 B7m     We produce screws and stud bolts in A193 B8 and  stud bolts in A320 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 304 is less subject to intercrystalline corrosion than type 302.
We recommend to avoid slow cooling and heating processes between 450-900°C-

A193 B8 and A320 B8 has a good heat oxidation resistance up to 850°C in current “on order” conditions, upto 800°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 308 or 347. The after-welding treatment is not necessary when the welded sections have a thickness lower than 25mm. Nuts for bolts in ASTM A193 B8 and ASTM A320 B8 : A194 grade 8    We produce screws and stud bolts in A193 B8M  and  A320 B8M. This is a NI-Cr austenitic not tempered stainless steel,  hardening through cooling warping. It has a higher corrosion resistance than the type 304 regarding the  pitting caused by chloride ions.

A193 B8M and A320 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 316L is slight susceptible to intercrystalline corrosion, anyway we recommend to avoid the slow heating and cooling between 450-900°C. The after-welding treatment is not necessary when the welded sections have a thickness lower than 25mm. Nuts for bolts in ASTM A193 B8M and ASTM A320 B8M : A194 grade 8M  ASTM A193 B8M Class 1 Stainless steel, AISI 316L, carbide solution treated.

ASTM A193 B8M Class 2 Stainless steel, AISI 316L, carbide solution treated, strain hardened