Shaanxi Jiade Group Co Ltd · Xi'an, Shaanxi, China
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Inspector checking line pipe in the pipe yard
Knowledge centre

Guides for the People Who Choose the Grade

15 guides on grade selection, corrosion behaviour, finishes, tolerances and fittings, written for engineers and buyers rather than for search engines.

Comparison of AISI 316 and 316L stainless steel
Comparison Guide

316 or 316L Which One Belongs in a Welded Fabrication

316 is the second most used alloy in the 300 series. 316L is its low carbon version, created to stop the weld zone corroding.…

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2205 duplex stainless steel plates stacked and banded
Material Guide

Duplex and Super Duplex What the PREN Number Tells You

Duplex grades carry a mixed austenite and ferrite microstructure in roughly equal proportion. Super duplex is a subcategory of…

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Comparison of Hastelloy and Monel nickel alloys
Comparison Guide

Hastelloy and Monel How to Tell Which One Your Process Needs

Both are nickel alloys and both are expensive, but they are built for different chemistry. Monel is a nickel copper alloy for…

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904L stainless steel bar stock bundled in the warehouse
Material Guide

904L Stainless Steel and the Industries That Depend on It

904L is a high alloy austenitic stainless steel with low carbon and high chromium, nickel, molybdenum and copper. It exists for…

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2205 duplex stainless steel plate with mill finish surface
Buying Guide

2205 Duplex Sheet and Why Designers Reach for It

The 2205 designation describes the chemistry: roughly 22 percent chromium, 5 percent nickel and 3 percent molybdenum with a…

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Comparison of stainless steel grades 304 and 202
Material Guide

The Three Families of Stainless Steel and How to Pick One

There are thousands of stainless steel alloys but only three broad families. Knowing which family you are in settles most…

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Molten steel being poured in the melting shop
Troubleshooting Guide

Why Stainless Steel Rusts and What the Passive Film Is Doing

Brown spots on a stainless surface surprise people who believe stainless cannot rust. It can, under specific conditions, and…

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Metal being weighed on an industrial scale before dispatch
Buying Guide

Why You Must Ask About Tolerance When Buying Stainless Plate

Tolerance is the permissible deviation in length or thickness, and on stainless plate it is a commercial term as much as a…

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Chart of butt weld fitting shapes including elbows tees reducers caps and stub ends
Design Guide

Butt Weld Fittings and the Centre to Face Rule

Butt weld fittings cover elbows, tees, reducers, crosses, caps and stub ends, in carbon, stainless, duplex and nickel alloys. The…

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Comparison of ASME B16.47 A series and B series large diameter flanges
Design Guide

A Series or B Series for Large Diameter Flanges

Above DN600 a large diameter flange has to be specified as A series or B series. Designers who leave that off the drawing buy the…

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ASTM A312 stainless steel seamless pipes stacked ready for dispatch
Industry Article

Where Stainless Steel Pipe Is Actually Used

Stainless pipe follows whichever industry is growing. Four applications account for most of the volume, and each one specifies…

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Brushed stainless steel surface showing fine directional grain
Process Guide

Surface Treatment Options for Precision Stainless Tube

Precision tube is better than ordinary tube in size, performance and appearance, and the surface treatment is a large part of…

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Inspector checking pipe ends and wall in the pipe yard
Quality Guide

How Pipe Ends and Wall Thickness Are Inspected After Rolling

Uneven wall thickness exists at both ends of a pipe after rolling, which is why each pipe has part of both ends removed. Knowing…

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Martensitic stainless steel transformation temperature chart
Material Guide

Martensitic Stainless Steel and Where Hardness Wins

Martensitic stainless steels transform on cooling rather than staying austenitic, which is what lets them be hardened by…

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Shaanxi Jiade Import and Export stand with visitors at INNOPROM 2024 in Yekaterinburg
Company News

Shaanxi Jiade at INNOPROM 2024 in Yekaterinburg

From 8 to 11 July 2024, Shaanxi Jiade joined the Shaanxi provincial delegation at the Russian Industrial Exhibition INNOPROM 2024…

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FAQ

About These Guides

Who writes these guides
They are written from the technical material published on this site and from the specifications we produce to, aimed at engineers and buyers who have to choose a grade rather than at general readers.
Can I use these figures in a specification
The figures come from our own published product data and from the standards named in each guide. Confirm the current revision of any standard before writing it into a specification.
Do you cover grades you do not sell
Yes, where the comparison helps. Several guides explain when a grade we do not stock would be the better choice.
How do I ask a question not answered here
Message WhatsApp or email with the service conditions and a written answer comes back with any quotation.

Still Choosing Between Two Grades

Send the medium, the temperature and the chloride level and you will get a written recommendation, not a catalogue page.