Or simply go through the following pages with links to the relevant articles
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European dimensional tolerance standards for flat rolled stainless steel products are listed. The standards are BS EN 10029, BS EN 10048, BS EN 10051, BS EN 10258 and BS EN 10259.
A summary of the EN standards for stainless steel products showing which grades appear in which standards.
European standards EN10028-7, EN10272, EN10269, EN 10222-5, EN 10213-2, EN 10213-4 are harmonised in the PED 97/23/EC for pressure equipment. Requirements on procurement, fabrication and inspection are outlined. Approved producers may use the CE mark on their products. The issues of TUV approval for pressure equipment to German designs is also discussed.
The background to the publication of EN 10088 parts 1, 2 and 3 and EN 10095 is described. Part 1 covers chemical compositions and some physical properties of the European stainless steel grades. Part 2 covers flat products, i.e. sheets and plates, with their mechanical properties and replaces BS 1449 part 2 1983. Part 3 covers long products, i.e. bars and sections and replaces BS 970 part 1. EN 10095 covers Heat Resisting Steels and Nickel Alloys in all product forms. These only cover ‘general engineering’ purposes. Pressure purposes are covered by EN 10028 part 7, (flat products), and EN 10272, (long products). A summary table of standards is shown, which includes the separate dimensional tolerance standards
The number of European standards relating to stainless steel grades, mechanical properties and tolerances can be quite complex. This article attempts to summarise the structure of the existing standards in a way that enables you to find which standard you are looking for.
Duplex Stainless Steels are growing at a high rate. It is important to understand how they differ from the more familiar stainless steels and how these differences affect the fabrication methods and parameters
Ferritic stainless steels are magnetic, have a low carbon content and contain chromium as the main alloying element, typically between 13% and 17%. Examples of ferritic grades are 3Cr12, (1.4003), and 430, (1.4016).
Sulphur, selenium and calcium treated improved machinability stainless steels are compared. European steel numbers for these grades are listed and include 1.4005, 1.4006, 1.4021, 1.4028, 1.4029, 1.4031, 1.4057, 1.4112, 1.4125, 1.4542, 1.4305, 1.4307, 1.4541, 1.4401, and 1.4404. The former BS grades covered by this article include 416S21, 416S29, 416S37, 416S41, 441S29, 441S49, 303S21, 303S41, 325S21 and 326S36 Grade types 440B, 440C, and 17/4PH, 17/4, 17-4 are also mentioned. The short-comings of these types of steels, compared to the un-treated types is outlined.
The main factor in the selection process for stainless steels is corrosion resistance. Careful consideration of the application should be done to enable a choice of grade with suitable corrosion resistance whilst keeping costs to an economic minimum. Other considerations such as mechanical properties, (strength and toughness), physical properties, (magnetic permeability) and forming, fabrication and joining methods available should be secondary. (91)
This article has a listing of terms often specifically associated with stainless steels, their processing and use. Terms listed include, active, annealing, austenite, austenitising, bright annealing, cathodic protection, chlorides, (halides), cold and hot working, corrosion, creep, deep drawing, duplex, fatigue, (endurance),ferrite, martensite, normalising, passive, passivation, permeability, pH, pickling, pinch pass, pitting, precipitation hardening, scaling temperature, sensitisation, stabilisation, stress relieving, stretch forming and tempering