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Environmental protection instruction RoHS2009.08.18
To deleterious substance limit instruction RoHS Directive Scope 1 Is similar with the >WEEE instruction, except that: •Only puts in the market regarding July 1, 2006 the new product. •Including home use Bai Zhi light bulb and photo source. •Should not violate …
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2009.08.182846100 Q mechanical knowledge
100 Q mechanical knowledge A: What is called the projection plane parallel to the line? What are the straight-line projection of? A: When a straight line parallel to the projection plane, the call for the projection plane parallel to the line. The straight-line…
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2009.08.182619Stainless steel related practical knowledge - standard letter knowledge
Stainless steel related practical knowledgeFirst, stainless steel hot rolling steel plateThe stainless steel hot rolling steel plate is the stainless steel steel plate which produces with the hot rolling craft. What thickness is not bigger than 3mm is the thin …
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2009.08.182168Steel products technique of production
Steel products technique of production1st, in carbon steel definition and steel five elementsIs called the steel including the carbon 2% following iron-carbum alloys.In the carbon steel five elements are refer to the chemical composition the main constituent, n…
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2009.08.182163Our country steel grade expression method
The second section our country steel grade expression methodFirst, our country steel grade expression method outlineThe steel trademark abbreviation steel grade, is the name which takes to each kind of concrete steel product, is the people understands the steel…
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2009.08.182084Steel classification
Steel products knowledge (one)----Steel classificationThe first section steel classificationFirst, ferrous metal and non-ferrous metal1st, ferrous metalIs refers to hard and the hard alloy. Like steel, pig iron, ferroalloy, cast iron and so on. The steel and th…
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2009.08.182281Metal yield strength, tensile strength, degree of hardness knowledge - fastener related knowledge
Steel products mechanical property introduction1. yield point (σs)Steel products or test specimen when stretch, when the stress surpasses the limit of elasticity, even if the stress no longer increases, but the steel products or the test specimen still continu…
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2009.08.182151Screw specification definition and understanding - fastener knowledge
Screw specification definition and understandingOne. Thread type:A: Triangular thread (60 degrees): Union/lockingB: Is effective the triangular thread (55 degrees): Union/lockingC: Acme thread (30 or 29 degrees): Power driveD: Square thread (90 degrees):…
