About Super Clean Seamless Stainless Steel PRIMET

In advanced technology areas such as semiconductor equipment and ultra high vacuum equipment, high quality and high degree of cleanliness are extremely important requirements for the parts of manufacturing equipment. PRIMET fittings are manufactured using "PRIMET", a material in which the impurities have been reduced to the absolute minimum and nonmetallic inclusion and gas components have been reduced to the minimum possible. PRIMET has more advanced material character than conventional stainless steel 316L.

Features

  • Accuracy Control of chemical components
  • Low nonmetallic inclusions
  • Higher cleanliness
  • Superior weldability

Guaranteed levels of chemical components

Chemical Components：Wt% PRIMET
Guaranteed levels in manufacturing stage		 PRIMET
Actual levels in manufactures products		 PRIMET-VIM/VAR
Guaranteed levels in manufacturing stage		 JIS G3459
SUS316LTP		 ASTM
A269 TP316L
C ≦
0.010		 0.005 ≦
0.010		 ≦
0.030		 ≦
0.035
Si ≦
0.30		 0.05 ≦
0.20		 ≦
1.00		 ≦
0.75
Mn ≦
0.40		 0.25 ≦
0.05		 ≦
2.00		 ≦
2.00
P ≦
0.030		 0.020 ≦
0.020		 ≦
0.040		 ≦
0.040
S ≦
0.030		 0.001 ≦
0.002		 ≦
0.030		 ≦
0.030
Cu ≦
0.25		 0.17 ≦
0.25		 - -
Ni 14.50
～
15.00		 14.57 14.50
～
15.00		 12.00
～
15.00		 10.00
～
15.00
Cr 16.50
～
17.00		 16.91 16.50
～
17.00		 16.00
～
18.00		 16.00
～
18.00
Mo 2.20
～
3.00		 2.23 2.20
～
2.50		 2.00
～
3.00		 2.00
～
3.00
Al ≦
0.010		 ＜
0.002		 ≦
0.010		 - -
N※ ≦
150		 64 ≦
150		 - -
O※ ≦
15		 5 ≦
15		 - -
H※ ≦
2.0		 1.3 ≦
2.0		 - -

Comparison of nonmetallic inclusions

Measuring method JIS G0555
Inclusion component dA dB+dC TOTAL
PRIMET Guaranteed levels in manufacturing stage - - ≦0.06
PRIMET  Actual levels in manufactures products 0 0.006 0.006
SUS316L Typical Example 0.01 0.05 -

Comparison of cleanliness of PRIMET and general Stainless Steel 316L

Weldability