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Sorry: Correct name of this tread is: Relationship between the tensile strength and surface finish steel chains

Hi, Do you have please any explanation for this phenomenon? Our problem relates to steel chains ( lifting or anchor chains -the type of chain makes no sense in this case). Many times we experimentally verify that when we applied to the surface of the chain links any color coating or zinc...

Hi, I would like to ask you for your opinion about a low carbon steel (0,2 wt.%.) steel alloyed with cobalt 0,2 – 1 wt.%. The other composition - Ni - 1%, Mo – 0,5%, Cr – 0,5%, Mn – 1,1 %. I know that cobalt is already used in high speed steel (2 wt. % and more), where cobalt bring higher...

TVP, I found only an original in Japanese. Could you give me please a link on this paper in English?

To TVP - Thanks, do you have this paper in english?

to CoryPad Yes, I will try to lower carbon content but I'm looking for an another way. With boron we have a bad experiences because this material is welded by using flash welding. And the weld joint isn't good. Thanks

I need minimum 42 J at the temperature -40°C. This is quit difficult because I need a tensile strength minimum 1400 MPa in the same time. By pushing the tempering temperature up to 540-600 I don't get required strength even after increasing a carbon content. I found the tempering/strength limit...

Thanks for replies, Process history: 1) Quenching (880°C temperature/water) 2) Tempering (360°C temperature/ 1 hour/air). Microstructure: tempered martensite Impact energy: approximately 20-30J and we need 40 - 50 Joule. And I can't lower the tempering temperature and have only...

Hi, I want to ask you for your opinion. I have such steel: 0,23%carbon, 1,3% manganese, 0,2% silicon, 1,0% nickel, 0,55% molybdenum, 0,55%chromium and this steel is usually rolled to bars. This material has high strength and should have the better impact toughness (determined by impact energy)...