60/40 vs. 63/37 Solder
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From: Spehro Pefhany on 18 Jul 2010 14:52 On Sun, 18 Jul 2010 11:28:06 -0500, the renowned Jim Yanik <jyanik(a)abuse.gov> wrote: >"William Sommerwerck" <grizzledgeezer(a)comcast.net> wrote in >news:i1upmh$14a$1(a)news.eternal-september.org: > >>> AH-SO! At last we're communicating. Yep, usenet is tough that way >>> sometimes. Here's the missing piece: The solder I buy IS KESTER. The >>> EXACT same stuff that you buy. Only two differences: The disparity in >>> formulations is less, and the price is roughly half. >> >> Fascinating. Perhaps someone, somewhere will have an explanation. >> >> >> > >different businesses mark up at different prices. >name brands often go at higher rates,and less popular items may get priced >lower to move them. Solder prices for single pound lots are all over the map- they change with voltatile metal prices and some distributors may have old stock. http://www.lme.com/tin_graphs.asp http://www.lme.com/lead_graphs.asp There's been roughly a 4:1 price range in lead and 2.5:1 in tin over the past three years. Currently tin costs about 10x as much as lead, so you'd expect about a 10-11% price difference due to cost of the metals. At current prices there's around $5.30 worth of metals in a pound of solder, of which only 30 cents or so is lead. There's also the plastic spool, the cardboard box and 10-15 grams of flux. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" speff(a)interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
From: tm on 18 Jul 2010 14:59 "Spehro Pefhany" <speffSNIP(a)interlogDOTyou.knowwhat> wrote in message news:b7i646p44pljor9299tidign5411gmnv6v(a)4ax.com... > On Sun, 18 Jul 2010 11:28:06 -0500, the renowned Jim Yanik > <jyanik(a)abuse.gov> wrote: > >>"William Sommerwerck" <grizzledgeezer(a)comcast.net> wrote in >>news:i1upmh$14a$1(a)news.eternal-september.org: >> >>>> AH-SO! At last we're communicating. Yep, usenet is tough that way >>>> sometimes. Here's the missing piece: The solder I buy IS KESTER. The >>>> EXACT same stuff that you buy. Only two differences: The disparity in >>>> formulations is less, and the price is roughly half. >>> >>> Fascinating. Perhaps someone, somewhere will have an explanation. >>> >>> >>> >> >>different businesses mark up at different prices. >>name brands often go at higher rates,and less popular items may get priced >>lower to move them. > > Solder prices for single pound lots are all over the map- they change > with voltatile metal prices and some distributors may have old stock. > > http://www.lme.com/tin_graphs.asp > http://www.lme.com/lead_graphs.asp > > There's been roughly a 4:1 price range in lead and 2.5:1 in tin over > the past three years. Currently tin costs about 10x as much as lead, > so you'd expect about a 10-11% price difference due to cost of the > metals. At current prices there's around $5.30 worth of metals in a > pound of solder, of which only 30 cents or so is lead. There's also > the plastic spool, the cardboard box and 10-15 grams of flux. > > And then there is the shipping. --- news://freenews.netfront.net/ - complaints: news(a)netfront.net ---
From: Smitty Two on 18 Jul 2010 15:18 In article <b7i646p44pljor9299tidign5411gmnv6v(a)4ax.com>, Spehro Pefhany <speffSNIP(a)interlogDOTyou.knowwhat> wrote: > At current prices there's around $5.30 worth of metals in a > pound of solder, No wonder I haven't seen those $4.95/lb. bar solder sales lately. I used to wait for those and stock up a couple hundred pounds for the soldering machine.
From: William Sommerwerck on 18 Jul 2010 15:52 > There's been roughly a 4:1 price range in lead and 2.5:1 in tin > over the past three years. Currently tin costs about 10x as > much as lead, so you'd expect about a 10-11% price difference > due to cost of the metals. At current prices there's around $5.30 > worth of metals in a pound of solder, of which only 30 cents or > so is lead. There's also the plastic spool, the cardboard box > and 10-15 grams of flux. The fog is lifting...
From: John Fields on 18 Jul 2010 17:14
On Sun, 18 Jul 2010 11:44:51 -0700, "William Sommerwerck" <grizzledgeezer(a)comcast.net> wrote: >>> Correct. The original writer was probably confused by the >>> fact that the materials ceramic ICs are made of can contain >>> radioactive materials that can cause errors. > >> No, the alphas from lead are a real problem. Ten years ago, there were >> folks going round to churches with lead roofs, offering them a new lead >> roof in exchange for their old--and now low-alpha--lead ones. > >But where is the lead /within/ ICs? (The wires are bonded, not soldered.) >Alpha particles have poor penetrating power. --- In the lead frame? ;) |