参考资料：
http://www.ukuleleworld.com/string-types.html
Steel Strings: Here come one of my pet hates..... people wanting to put steel strings on a wooden ukulele.Yes, guitars have metal strings, so do mandolins, and banjos.... but a uke sounds terrible to me with steel strings（声音很不好听）.Worst of all it is easy to overtighten the strings and damage the instrument（很容易因为张力过大而损坏琴体）.
The exception to this are the baby "electric guitar" ukuleles that were made for metal strings only.（本来就要采用金属弦的迷你“电吉他”尤克里里除外）
关于尤克里里琴弦的其他类型：
http://www.ukuleleworld.com/string-types.html
Gut Strings: Italian Gut strings were already produced in Padoa, Verona, Venice, Treviso and Vicenza since the beginning of the 17th century. Documents of the time show that such production lasted uninterruptedly well into the 20th century.
The ukulele came into being about 1879, and All early ukuleles had gut strings.Gut strings continued to dominate the ukulele market until at advent of DuPont's nylon during World War II.
Aquila Gut Strings are wholly produced in house in Vicenza (60 Km far from Venice), to individual requirements, beginning from fresh gut, respecting and reviving the old tradition.
Changes in humidy and temperature will drive you nuts with old old gut strings in keeping your ukulele in tune.Modern gut ukulele string are better sealed and are more stable.
I still like the warmthand melodic tone of genuine gut strings.
Nylon Strings:When nylon arrived.... the entire ukulele world switched to them.... the strings had more uniform diameters and properties.... they sounded pretty good.... and they were CHEAP to produce.
Most ukulele strings today are made from nylon polymers... but do not think all nylon is the same.Different companys use different nylon polymer grades.... so they are not all the same.
Very cheap nylon strings are made from the same nylon strands that they make scrub brush bristles from.
Nylon strings take a little while to settle down and take a set.Even then you have to tweak you uke up to pitch after it has been setting a while without playing.
NYLGUT Strings:These strings are a patented product of Aquila.These strings have a fuller sound than the monofiliment strings which I like better.The strings tend to be a little more cut sensitive so don't have the durability of monofilament strings.
Fluoro Carbon Strings: These are brand new to the ukulele world.Fluoro Carbon is a totally different and heavy polymer....1.6 sg compared to 1.3 sp for nylon.The polymer is tough so the strings are smaller diameter. The sound is loud, lively, bright, and chrisp.... which makes many "little ukuleles" really become assertive.
Fluoro Carbon is more expensive than nylon, so the cost of the strings is more.Generally these strings are sold in "double" sets.
Wound Metal Strings:Strings are wound with metal to give the string more weight and still be very flexible.Generally these metal windings areover a nylon floss core (like dental floss).If wound strings were not used on the lower notes on a ukulele, a thick polymer string would be very dead sounding.
Some people dislike wound string because they can "hiss" at you when your drag your finger tips on the windings of the strings.There are very finely wound strings called "studio" quality that minimize this hiss.
Wound Nylon Strings: Several makers are now making a new overwripped wound polymer string.These are very flexible, sound good, and do a good job.
BUT you cannot cut the string off or the winding will unwind ruining the string.
另一份关于尤克里里使用金属弦的资料：
http://www.easyukulele.com/ukulele-strings.html
Metal StringsThere are combinations of nylon and metal strings or just plain steel strings. Either way, they have a very different sound than the pure nylon, gut, or polymer strings（音色等肯定不同于尼龙弦）. They also can be too heavy for a ukulele, so when you tighten them, you can risk damaging the instrument（同时，对于尤克里里来说，金属弦太重，上紧弦的时候存在损坏乐器的风险）.
[ 本帖最后由 GuitarForest 于 2013-11-13 20:22 编辑 ]
回复 4楼 GuitarForest 的帖子
钢弦当然拉力大，必然不能调整成其标准音。你不明白我的意思，吉他丽丽的标准定弦是高于吉他的，我想做的是，给吉他丽丽装钢弦并把他降调调成和吉他一样的一弦e，这样虽然用了钢弦但是等于给吉他丽丽降了掉，降低了张力，但是就是不知道这个程度的降低对于琴体承受能力是过低还是过高。明白不？ 1，吉他丽丽相当吉他的6品的音。,
2，吉他丽丽是用尼龙线的的。
3，吉他丽丽换钢丝线声音太尖锐了，无法听。
4，吉他丽丽如果调成跟吉他一样的声音，那弦肯定是松松垮垮无法听的。 是啊，我也没试过，也不明白呢。谢谢楼上的解释
回复 5楼 腐烂的肉体 的帖子
从物理推算应该不会伤及琴体。因为琴小，有效弦长短，不用太大张力就可以调到吉他的EADGBE的音高。但声音好不好听要经过试验才知，估计不太好听，否则怎么没见过别人这么用过。 有钢弦吉他丽丽，淘宝都有一大堆，你可以自行科普。
回四楼，拜托你能不能看明白我的意思啊。。。我把尼龙的吉他丽丽换钢弦后降调你就确定是松垮垮的？？钢线拉力比尼龙大的太多，所以不知道可不可行。懂？？ 原帖由 腐烂的肉体 于 2013-11-14 00:27 发表
有钢弦吉他丽丽，淘宝都有一大堆，你可以自行科普。
回四楼，拜托你能不能看明白我的意思啊。。。我把尼龙的吉他丽丽换钢弦后降调你就确定是松垮垮的？？钢线拉力比尼龙大的太多，所以不知道可不可行。懂？？
吉他丽丽的弦长比标准吉他要短，吉他的音频是几个因素决定的，弦的粗细、弦的长短、弦的松紧。弦越细、越紧、越短，振动的频率就越高。
同样的两把吉他，都用钢丝弦，弦的粗细是一样的，弦的长短却不一样，当同样拉力的时候，短的弦必定振动频率高。你要降低短弦的振动频率，就必须降低弦的拉力。这个是简单的物理常识。
淘宝的钢丝弦吉他丽丽，音高必定高过普通的吉他，如果你要降低到普通吉他的音高，弦必定是松松垮垮无法弹奏，就等同你用变调夹夹到自己吉他的6品，然后按正常音调弦，调完之后松开变调夹的样子。
回复 10楼 130140160 的帖子
你怎么转不过弯啊。。。。。。。。。。。。首先纠正你一个错误，吉他丽丽定弦是一弦a，也就是比吉他高五品
再说我们讨论的问题，吉他丽丽的有效弦长是比吉他短，但是钢弦的张力也有大有小，010的普通琴弦和013的伊利克斯张力差距就非常大。所以在不知道吉他丽丽琴体耐受力和吉他琴弦张力的情况下，你是没法一口咬定吉他丽丽上钢弦就会松松垮垮的，懂？就比如一般的旅行吉他有有效弦长比标准41寸琴短，但是还是可以调标准音
最后说一下，这个问题不用争论了~刚才咨询了一个卖钢弦吉他丽丽的，他家的吉他丽丽定弦比普通吉他高一个大二度，但是用的是比10还细的弦，上了高张力弦的话调到标准音没有问题~ 本帖最后由 雪儿飘 于 2017-6-6 19:02 编辑
腐烂的肉体 发表于 2013-11-14 13:41
你怎么转不过弯啊。。。。。。。。。。。。
首先纠正你一个错误，吉他丽丽定弦是一弦a，也就是比吉他高五品 ...
650mm弦长的吉他一弦调#F用010的弦声音正好，用009或0095就不够醇厚，显得有铁丝味。
吉他丽丽弦长比650mm短，还能用010以下的弦？应该用比010粗的011或012的弦才对
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