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DD ENV 1090 Part 6 is the new fabrication and erection specification for stainless steel. It covers austenitic and duplex stainless steels used in buildings and other similar steel structures.
A document pubished by EuroInox on adhesive bonding of stainless steels
BS EN 10269 is the material standard for stainless and heat-resisting steels, a selection of low alloy steels and some nickel alloys for fasteners. The ambient temperature mechanical properties shown in this article include 0.2% proof strength, tensile strength, elongation, reduction in area and impact (charpy) strength in the finally heat treated condition. Specified hardness levels for the steels for subsequent quenching and tempering (1.4923 1.4938 and 1.4913) in their delivery condition are also included.
Austenitic stainless steels have excellent resistance to corrosion by acetic acid emitted by wood. They are NHBC recommended for a range of fasteners and fixings in timber. For use in immersed timber, the choice of grade depends on the specific water conditions, including chloride level and flow rate. Careful grade selection is also required for fixings in timber in swimming pool buildings.
Although classed as readily weldable, the austenitic stainless steels can be prone to distortion during and after welding. Removing cold work from forming or machining operations, fixturing and joint fit up can help reduce the tendency of welded fabrications to distort.
Most stainless steel types, with the exception of titanium or niobium stabilised grades, can be brazed. Brazing is a useful joining method for thin walled or delicate parts where welding can result in distortion. It is also useful for high volume production joining where continuous furnaces are employed. The three main procedures for brazing stainless steels in common use are brazing in air with flux, brazing under reducing atmosphere, vacuum brazing.
The moisture level in timber is the most important factor in determining the incidence of corrosion. Above a threshold moisture level, wood is always acidic due to the breakdown of wood cellulose to acetic acid. Applied chemical treatments to the timber or exposure in a marine environment can increase the corrosion risk.
BS EN 10269 is the material standard for stainless and heat-resisting steels, a selection of low alloy steels and some nickel alloys for fasteners. The chemical composition of stainless steel grades covered in the this standard include 1.4307 1.4301 1.4303 1.4404 1.4401 1.4429 1.4567 1.4923 1.4938 1.4913 1.4982 1.4910 1.4919 1.4941 1.4980 and 1.4986
This article compares the chemical composition of a number of 316 type grades as covered by the now superseded BS1449 and BS970 and their replacement, BS EN 10088 Parts 2 and 3. Grades covered include 316S11 316S12 316S13 316S16 316S31 316S33 and European steel numbers 1.4401 1.4404 1.4432 and 1.4436
This article gives recommendations for full and partial penetration butt welds and fillet welds made by an arc welding process. The adequacy of a weld at ultimate limit state may be determined by the simple method of BS 5950:1. The Geometric parameters required for the calculation of design strength are the effective length of the weld and the effective throat size, whilst guidance is given on suitable range for the angle of intersection at the joint.