Material

Material

The Analysis of Stainless Steel Material Used for Watch Band Making

Type of Steel Chemical Composition% Character
C Si Mn P S N Cr Mo Cu Other
SUS 304 ≦0.08 ≦1.00 ≦2.00 ≦0.045 ≦0.030 8.00-10.50 18.00-20.00 -- -- -- Standard (basic) 18-8 stainless steel
SUS 304L ≦0.03 ≦1.00 ≦2.00 ≦0.045 ≦0.030 9.00-13.00 18.00-20.00 -- -- -- Carbon content is decreased from 0.08% (in 304) to 0.03% in order to increase the corrosion-resistance.
SUS 303 ≦0.15 ≦1.00 ≦2.00 ≦0.20 ≧0.150 8.00-10.00 17.00-19.00 -- -- -- By adding S to 18-8 stainless steel to be free machining, corrosion-resistance is influenced and the extensibility is desreased.
SUS 303C ≦0.15 ≦1.00 ≦2.00 ≦0.20 ≧0.150 8.00-10.00 17.00-19.00 -- 1.50-3.50 -- By adding Cu to 303 to increase free-machining.
SUS 316 ≦0.08 ≦1.00 ≦2.00 ≦0.045 ≦0.030 10.00-14.00 16.00-18.00 2.00-3.00 -- -- By adding Mo (2~3%) to 304 to increase corrosion-resistance especially for sulphuric acid.
SUS 316F ≦0.08 ≦1.00 ≦2.00 ≦0.045 ≧0.100 10.00-14.00 16.00-18.00 2.00-3.00 -- -- By adding S (0.15%) to type 316 to be free machining.
EN 1.4427 ≦0.12 ≦1.00 ≦2.00 ≦0.060 0.15-0.35 10.50-13.50 16.50-18.50 2.00-2.50 -- -- European (EN) specification of free-machining material 316, equivalent to SUS 316F.
AISI 316L ≦0.03 ≦1.00 ≦2.00 ≦0.045 ≦0.030 10.00-14.00 16.00-18.00 2.00-3.00 -- -- Carbon content is decreased from 0.08% (in 316) to 0.03% in order to increase the corrosion-resistance.
SUS 316L ≦0.03 ≦1.00 ≦2.00 ≦0.045 ≦0.030 12.00-15.00 16.00-18.00 2.00-3.00 -- -- Nickel content needs to reach 12% minimum, which will distinguish it from AISI 316L.
EN 1.4435 ≦0.03 ≦1.00 ≦2.00 ≦0.045 ≦0.025 12.50-15.00 17.00-18.50 2.50-3.00 -- -- European (EN) specification of type 316L.
AISI 316LVM ≦0.03 ≦1.00 ≦2.00 ≦0.025 ≦0.010 13.00-15.50 17.00-19.00 2.50-3.20 -- N≦0.10 American (AISI) specification of type 316L specifically used for medical application.
EN 1.4441 ≦0.03 ≦1.00 ≦2.00 ≦0.025 ≦0.010 13.00-15.50 17.00-19.00 2.50-3.20 ≦0.10 N≦0.10 European (EUI) specification of type 316L specifically used for medical application.
BioDur 316LS ≦0.03 ≦0.75 ≦2.00 ≦0.025 ≦0.010 13.00-15.00 17.00-19.00 2.25-3.50 ≦0.50 N≦0.10 An exclusive product of type 316L by Carpenter (American company) specifically used for medical application.
1.4427So ≦0.03 ≦1.00 ≦2.00 ≦0.045 0.10-0.139 12.00-14.00 16.50-18.50 2.10-2.50 -- -- European exclusive product, free machining material of type 316L.
316LS-TLM ≦0.03 ≦1.00 ≦2.00 ≦0.045 0.10-0.13 12.00-14.00 16.50-18.50 2.10-2.50 -- -- Free machining material of type 316L supplied exclusively by Taiwan Linkigi, equivalent to 1.4427So.
316L+F ≦0.03 ≦1.00 ≦2.00 ≦0.045 0.10-0.20 11.00-14.00 17.00-19.00 2.00-3.00 1.00-2.00 -- Free machining material of type 316L supplied exclusively by Taiwan Linkig.
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