Boron In Steel - Updated 02 May 2017
Historically, boron has not been intentionally added to structural steel manufactured in New Zealand or Australia to AS or AS/NZS standards. However some overseas steelmakers have added boron to structural steel to take advantage of export subsidies or for other reasons, including improved impact energy.
Reports indicated that some imported steel may show elevated levels of boron; traditionally steel in Australia and New Zealand has been made without boron additions. The welding requirements of AS/NZS 1554 have been established without considering the effect of boron as an alloying element.
HERA published Advisory Note: Welding to AS/NZS 1554.1 of boron containing steel in 2016. The Advisory Note explains steps that should be undertaken by the fabricator to ensure the integrity of the steel fabrication work when welding boron structural steel with elevated boron levels. This Advisory Note was revised following comments from member companies.
This article discusses steps that should be undertaken by the fabricator to ensure the integrity of the steel fabrication work when welding structural steel with elevated boron levels. Read the updated article HERE.
R8-29 - Characterisation of the New Zealand welding industry - 2010
This research is part of a long-term Heavy Engineering Research Association (HERA) programme with the over all aim to improve welding productivity and in the process reduce welding-related expenditure. The specific objective of this part of the programme is to characterise the entire NZ welding-related industry and its individual sectors through the collecting and analysis of statistical data available from Statistics NZ, HERA, and other resources, and put it in a context with overseas data.
R8-20 - Influence of surface roughness on low cycle fatigue - 2000
The influence of surface roughness and rolling direction were investigated under three loading patterns, monotonic, and both low and high cycle fatigue
R8-16 - Welding in the Transport Industry: 1-day seminar on Design, Fabrication and Quality Assurance Requirements - 1998
Notes from a seminar covering design, fabrication and quality assurance requirements for transport equipment built in New Zealand are presented
R8-15 - Examination of welded moment resisting connections under low cycle, high strain rate, inelastic load - 1995 Revised 2000
The report describes small scale tests devised to investigate in a simple and low cost test setup the principal influences of differing material properties and weld design alternatives on joint performance
R8-14 - Stainless steel weld surface finish and bio film development : a round robin test -1996
This report covers the cleanability aspect of the PAW samples.
The food industry requires for hygiene reason excellant cleanability from stainless steel surfaces in contact with food. This report describes a study assessing the aspect of biofilm development and cleanbility of Plasma Arc Welded 304L stainless steel surfaces.
R8-13 - Weld surface finish of PAW and PAW/GTAW welded stainless steel - 1996
This project aimed to show that the surface of stainless steel plasma arc welds, and combinations of plasma arc and gas tungsten arc welds can produce surface finishes that meet the hygiene requirements of equipment for the food processing industry without the need for costly grinding and polishing.
R8-11 - Influence of welding parameters on the surface of plasma arc welded 304L stainless steel - 1995
A series of 4 mm 304L stainless steel plates were autogenously welded by the plasma arc method in the down hand position
R8-10 - Stainless steel weld surface finish and industrial hygiene requirements - 1995
Stainless steel weld surface finish and industrial hygiene requirements.
The project has been carried out in two stages - one examing the correlation between welding process variation of MMAW, GMAW, FCAW, SAW, STAW, and PAW and achievable surface finish, the other examining the correlation between surface finish and hygiene rquiremens by investigating the biofilm development of the different pickled and passivated weld surface finishes and ground and polished welds. Thus, a correlation between biofilm development and achievable surface finish of different process variations investigated could be stablished.
R8-08 - Comparison of weldability of primer systems - 1993
The paper reports on welding tests carried out at the New Zealand Welding Centre on plates pre-primed with zinc silicate primers of two primer systems. One was a traditional zinc alkly silicate primer requiring a higher recommended dry film thickness compared to a newly developed low zinc alkyl silicate primer. The tests were performed on welded joints that were expected to produce a relatively high porosity level. The welding processes compared were MMAW, GMAW, ad FCAW
R8-07 - High strength steel : design and fabrication : appendices - 1992
This report is the result of a project carried out by the New Zealand Welding Centre with the aim to increase productivity of high strength steel (yield > 450 MPa) fabrication and to increase the usage of these materials where savings and quality related advantages can be obtained.