Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: Frank Krygowski <frkrygow@sbcglobal.net>
Newsgroups: rec.bicycles.tech
Subject: Re: Machine Shop
Date: Mon, 3 Mar 2025 20:40:35 -0500
Organization: A noiseless patient Spider
Lines: 28
Message-ID: <vq5lmj$1i2qm$4@dont-email.me>
References: <IlHFO.77208$1m96.61123@fx15.iad> <vc7gsb$2brsl$3@dont-email.me>
 <FwYFO.93926$v8v2.91066@fx18.iad>
 <i5vgej9tm9fu3oosoukjjqovmqb4rp0onj@4ax.com>
 <Op1GO.23868$6a33.16569@fx33.iad> <vcanav$35vab$2@dont-email.me>
 <vd29u9$3sdmh$2@dont-email.me> <vd3pnp$71lk$2@dont-email.me>
 <jLrXO.537817$WOde.88257@fx09.iad> <vglnak$3aja7$3@dont-email.me>
 <F%puP.115483$1Fwa.96971@fx01.iad>
 <4edkrj13v11bkgfpmgcr58psf6v64j906f@4ax.com> <vpdim4$54ql$3@dont-email.me>
 <g4dcsjp0861h473qm48glmva215n16bhv7@4ax.com>
Reply-To: frkrygow@gmail.com
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Tue, 04 Mar 2025 02:40:36 +0100 (CET)
Injection-Info: dont-email.me; posting-host="b86ccf08116856650d2eff718ae4e858";
	logging-data="1641302"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX18irlSa6CGNtaEOQ3j6xocKjDvVESVgzq0="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:cMAA8ehcbRdGLHpvpWHnAbVfdgE=
Content-Language: en-US
In-Reply-To: <g4dcsjp0861h473qm48glmva215n16bhv7@4ax.com>
Bytes: 2740

On 3/3/2025 6:30 PM, Jeff Liebermann wrote:
> 
> 1095 is a steel alloy that can be used for making steel springs.  It
> can also be used for making knife blades, where the a springy steel
> makes the blade more durable.  The major difference is the steel
> spring is fairly thin, while the knife blade is much thicker.  Same
> spring effect, but very different products.

OK, to talk some metallurgy: I don't know that 1095 should be described 
as a "springy" steel, because I don't know what you mean by "springy." 
It's not a typical metallurgical term.

Maybe you mean it has a higher yield stress? That would mean it could 
deflect more before a permanent deflection. And springs are called on to 
purposely deflect.

1095 is popular for knife making, but I think it's more because it's not 
expensive, while still being easy to heat treat in a way to reach a good 
compromise between hardness (for edge retention) and ductility (for 
toughness).

In general, the higher the hardness of a steel, the higher the yield 
stress and the lower its toughness. That balance of properties can be 
well controlled by heat treating. Alloying elements can improve that 
balance.

-- 
- Frank Krygowski