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[求助] 有关SF20T的相关资料

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发表于 2010-8-19 13:45:48 | 显示全部楼层 |阅读模式 来自: 中国浙江宁波

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哪位大虾有SF20T材料的相关资料# a3 r+ e$ k2 Z+ ?" n
希望分享一下. X0 |- }) \6 q8 o/ b* t4 a7 m
谢谢了
发表于 2010-8-20 21:45:14 | 显示全部楼层 来自: 中国辽宁大连
SF20T(product of Shimomura Tokushu Seiko Co., Ltd.) is used as standard lens holder material* k- s, v  u/ k; S- J( r, X% v- A: e
in our products.
. ]+ {/ l" {9 b) [This is developed to improve anticorrosion of SUS430(ferritic stainless steel) and has achieved4 ]) K  n8 e8 p; ]' |
anticorrosion near SUS304 by 20%Cr-2%Mo.
" e0 w$ Q$ n1 V0 E9 ^7 E7 ]Currently, it is near SUS444, but is not applied to JIS(Japanese Industrial Standard) steel grade.
# B+ H, n9 }, M1 Q3 m. S! KSF20T is free-cutting stainless steel of low-carbon ferritic series.9 ~% S  K' o  g+ ?6 f7 q( M
Characteristic
  s8 C$ _4 m& k: } ☆Machinability! w/ C2 [8 P3 }6 u
    SF20T has an equivalent or greater machinability than JIS SUM24L(heavy free-cutting) and& h) [, y0 q2 q0 q
near at brass.7 x; J& f$ ^  X: ]! i9 [& i4 g
 ☆Anticorrosion
9 D6 M/ ~4 ?& v/ D8 gIn usual atomosphere, the anticorrosion is the order of bellow.2 o" @' ^8 T6 q
     High SUS304>SF20T=SUS303>SUS430 Low.- [0 ]  P( ?6 F1 N; }& c
And SF20T has an enough anticorrosion.8 b+ c4 }6 N) i  |% X* f$ A- v
 ☆Magnetic characteristic  K- x# [* j6 c- j: f
    SF20T which have high permeability and low coercive force, can be used as an electromagnetic
! }/ i: D$ C3 S  lstainless steel.
: p# v' ^# \0 f" B. r$ `9 u ☆Cold processing (Caulking)0 S: V* [3 C3 Z8 g" |6 _
    Cold processing of SF20T is more excellent than SUS303.
) \+ F9 T% G: L, T; X& f( f ☆Welding
0 F* G) ~6 a8 T$ e( {: a  v    Welding of SF20T is inferior to SUS304 for added free-cutting ingredient.* ^5 x. i4 R/ J1 l$ a9 M
However, SF20T is many used to the brazing and spot-welding.% r  Q" M: `+ ^9 h2 D) O
And it is not problem at the plasma-welding test.
sf20t.JPG
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