company news_company news_Jiangsu Jinsong Technology Co., Ltd.

2019-07-16 19:34:00

What is round steel and what are its characteristics

Stainlesssteelroundsteelbelongstothecategoryoflongproductsandalsobelongstothecategoryofrods.Theso-calledroundsteelreferstoasolidlongstainlesssteelbarwithauniformcircularcrosssection,whichisgenerallyaboutfourmeterslong.Itsspecificationsareexpressedinmillimetersindiameter."50"meansroundsteelwithadiameterof50mm.Accordingtothedifferenceinsurface,roundsteelcanbedividedintolightroundandblackrod.Theso-calledsmoothcirclemeansthatthesurfaceissmoothandhasbeensubjectedtoquasi-rollingtreatment.Theso-calledblackrodreferstotheblackandroughsurface,whichisdirectlyhotrolled.Commonmaterialsare301,304,303,316,316L,304L,321,2520,201,202,andsoon.Roundsteelisdividedintothreetypes:hotrolling,forgingandcolddrawing.Thesizeofhot-rolledroundsteelis5.5-250mm.Amongthem:5.5-25mmsmallroundsteelismostlysuppliedinstraightbundles,andisoftenusedassteelbars,boltsandvariousmechanicalparts;roundsteellargerthan25mmismainlyusedformanufacturingmechanicalpartsorasseamlesssteelpipebillets.

2019-07-16 19:33:00

Jiangyin Jinsong: Introduction of Several Common Martensitic Stainless Steels (1)

It belongs to martensitic stainless steel and is used after quenching and tempering. Its strength, plasticity and toughness match well. It has good corrosion resistance in weakly corrosive media whose temperature does not exceed 30 ℃

2019-07-16 19:34:00

Identification method of stainless steel

Magnetic test
Magnetic test is the simplest method to distinguish annealed austenitic stainless steel from ferritic stainless steel. Austenitic stainless steels are non-magnetic steels, but will be mildly magnetic after cold working at atmospheric pressure: pure chromium steels and low-alloy steels are both ferromagnetic steels.

2019-07-16 19:34:00

Introduction to stainless steel smelting process technology

Stainless steel has many excellent properties, beautiful appearance, long service life, and can be 100% recycled, so it is widely used.
The advancement of stainless steel smelting process technology, especially since the 1960s, the use of off-furnace refining and continuous ingot technology has further promoted the rapid development of stainless steel, improved the quality of stainless steel, increased the yield rate, and reduced production costs.

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