| A minute particle
is extracted by special heat-treatment and it stiffens. Corrosion
resistance is good and it is excellent in heat resistance. |
High
frequency sign |
JIS
sign |
Chemical
composition(%) |
Character
and usage |
| C |
Si |
Mn |
P |
S |
Ni |
Cr |
Cu |
その他 |
| U630 |
SUS630 |
0.07
or less |
1.00
or less |
1.00
or less |
0.040
or less |
0.0
under-30 |
3.00～
5.00 |
15.50～
17.50 |
3.00～
5.00 |
Nb+Ta
0.15～
0.45 |
Steel
kind to give precipitation hardening by adding Cu. Shafts and turbine
parts. |
| U631 |
SUS631 |
0.09
or less |
1.00
or less |
1.00
or less |
0.040
or less |
0.0
under-30 |
※
6.50～
7.75 |
16.00～
18.00 |
- |
Al
0.75～
1.50 |
Steel
kind to give precipitation hardening by adding Al. Washer and meter
parts in spring. |
| - Ni for the
wire rod is assumed to be 7.00-8.50%, and steel kind sign is assumed
to be SUS631J1. |
