Quality

Certifications

The entire MHA organisation works under the UNE EN ISO 9001:2008 quality standard, from the initial design process, the purchase of raw materials and the manufacturing process, right through to the final distribution of our products. As they are global in reach, these standards are internationally accepted throughout the world.

Our quality management system was approved by Lloyd’s Register Quality Assurance Ltd. and is accredited and certified by ENAC (Certificate of approval E200524 in accordance with ENAC certification Num. 07/EC/SC)

The fact that MHA has been awarded this certificate demonstrates that we apply the most stringent quality control checks throughout our products’ design, manufacture and distribution processes and that we use only top-quality raw materials to manufacture our products.

Under the terms and conditions of this standard, MHA manufactures all its stainless steel articles with material of 304 AISI 18/8 quality (minimum content of 18% chromium and 8 per cent nickel) and of 316 AISI 18/10 quality (18% chromium and 10% nickel). These are the internationally approved levels of material composition in so far as functionality, finish and durability are concerned.

In this way, MHA continues to improve and to drive forward its quality management system; we have obtained several CE marking certificates. Our medium-term objective is that our entire range of products should comply with CE marking regulations.

Stainless steel features

Stainless steel is a general alloy of a group of steel products that consist of a minimum of 12% chrome, with varying quantities of nickel, molybdenum, titanium and carbon

Stainless steel has been developed in order to get a great durability and resistance to the corrosion with a low maintenance requirement.

There are several types of stainless steel, which have corrosion resistance to different degrees. The most common and important type is know as austenitic and contains normally 18% chromium and 8% nickel, that’s 18/8.

Within the austenite group, there are two main types of stainless steel:

– AISI 304: It’s one of the most used stainless steel in building industry. It has a great combination of hardness, resistance and it´s easy to work with. Contains minimum of 18% chromium and 8% nickel.

 – AISI 316: It’s more resistant to the corrosion that 304. It can be used in environments of high corrosion (water of sea, chemical products…) . Contains minimum 18% chromium, 10% nickel and 2 – 3% molybdenum.

Aggressive environmental conditions can cause the following effects : Pitting, rusting, unsightly staining and even permanent damage. However, the degree of damage has been proved to be reduced by using higher stainless steel.

Basic recomendations for maintaining stainless steel fittings:

• The ironworks must be dust free at all times using clean dry clothes periodically. Coastal dust has saline elements, which combined with high humidity corrodes metals.
• Never apply solvents, polishers or detergents; or material using adhesives (adhesive tapes, etc.), as they break lacquer structure (in lacquered finishes).
• Install metal fittings only when the door or piece of furniture is complete and totally finished.
• While preparing the installations always keep the metal fittings in their original packaging and store in dry places.