WENZHOU HUASHANG STEEL CO., LTD. CALL US ANYTIME
+86-577-86383608
WENZHOU HUASHANG STEEL CO., LTD. EMAIL US NOW
info@sstubecn.com
WENZHOU HUASHANG STEEL CO., LTD.
WENZHOU HUASHANG STEEL CO., LTD.
inner banner

Difficulties in Stainless Pipe Fitting Processing and Common Problems in Welding

1. Difficulties in processing stainless steel pipe fittings


What are the difficulties in processing stainless steel pipe fittings?


As the scope of use of stainless steel profiles becomes more and more common, the demand for stainless steel profiles is also increasing, which has promoted the development of stainless steel precision machining to a certain extent. The following explains the difficulties that may arise in the processing of stainless steel pipe fittings:


(1) Severe work hardening of stainless steel pipe fittings: the work hardening tends to be high during cutting, and the tool cutting in the work hardened area will shorten the life of the grinding tool.


(2) High cutting force and high cutting temperature: Stainless steel pipe fittings have high strength, large tangential stress and large plastic deformation during cutting, so the cutting force is large. In addition, due to the poor thermal conductivity of stainless steel, and the high temperature tends to be concentrated in the narrow area near the cutting edge of the tool, it is easy to accelerate the wear of the related tool.


(3) Stainless steel pipe fittings are easy to stick to the knife: any stainless steel has the characteristics of tough chips and high cutting temperature during processing. When tough chips flow through the rake surface, the tool wear will accelerate.


2. Common problems when welding stainless steel pipe fittings


(1) In order to prevent the weathering corrosion due to processing heating, the welding current of weldable stainless steel pipe fittings should not be too sticky, and it is more suitable to be 20% less than carbon steel electrode. The arc should not be too long, and the inter-layer cooling should be narrow.


(2) The hardenability of weldable stainless steel pipe fittings is sticky after welding, and cracks are prone to occur. If typical weldable stainless steel pipe fittings are used for welding, preheating above 300°C and slow cooling at 700°C after welding are required. If the weldment cannot be subjected to post-weld heat treatment, stainless steel pipe fitting electrodes should be used.


(3) For weldable stainless steel pipe fittings, appropriate amount of invariant elements Ti, Nb, Mo, etc. are added to improve corrosion resistance and weldability, the weldability of which is better than weldable stainless steel pipe fittings. When using the same type of chromium stainless steel electrode, it should be preheated above 200℃ and tempered at 800℃ after welding. If the weldment cannot be heat treated, chromium-nickel stainless steel electrode should be used.

Related News

  • Stainless Steel Instrument Tubing

    Stainless Steel Instrument Tubing

    November 4, 2019Instrumentation is used to detect, measure, observe, calculate a variety of physical quantities, material components, physical parameters and other appliances or equipment. Instrumentation tubing is a...view
  • How to calculate radius of stainless steel elbow?

    How to calculate radius of stainless steel elbow?

    November 8, 2019I have my own unique views on the calculation formula of stainless steel elbow size. I hope you can learn more from the following experience.view
  • The Head Process of Stainless Steel Capillar

    The Head Process of Stainless Steel Capillar

    December 17, 2020At present, there are many precision stainless steel capillary parts in the market, such as the most common sensors, pipettes, and needles.Process requirements:Because the scope of application is high...view
  • Extrusion Technology of Stainless Steel Precision Tube

    Extrusion Technology of Stainless Steel Precision Tube

    December 17, 20201. The purpose of stainless steel precision tube extrusionThe main purpose of stainless steel precision tube extrusion is to steadily produce high precision products with small dimensional deviation. ...view
  • Application Prospect of Stainless Steel Tubing

    Application Prospect of Stainless Steel Tubing

    August 6, 2019Stainless steel pipes are safe, reliable, hygienic, environmentally friendly, economical and applicable. The successful development of thin-walled pipes and new reliable, simple and convenient connect...view
  • Attention in the Production Process of Medical Grade Capillary

    Attention in the Production Process of Medical Grade Capillary

    April 21, 2020Medical grade capillary production process should pay attention to the five main points:1. Whether the annealing temperature can reach the regular temperature. Stainless steel thermal treatment is gen...view

More Tubing Fittings To Consider

  • Concentric Reducer

    Concentric Reducer

    July 10, 2018Stainless steel tube weld fittings: Reducer(Concentric, Eccemtric, with hem, without hem.view
  • Tube Caps

    Tube Caps

    July 10, 2018Stainless steel butt weld tube fittings: tube cap, end cap, plug, cap, pipe cap, stuffy head.view
  • Weld Neck Flanges

    Weld Neck Flanges

    July 10, 2018Stainless steel neck flanges are popularly used in excessive stress applications.view
WENZHOU HUASHANG STEEL CO., LTD.