Knowledge Base

Topics related to brazing to aid with learning and understanding the technical aspects of brazing, how brazing works, why it works, along with useful hints and tips.

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Particle Size Comparisons Chart

Handy & Harman's powder atomization plant is among the most modern in the world. The atomization process is conducted in an inert gas atmosphere. As a result, the brazing alloy powders are exceptionally clean and free of oxides and impurities. Most Handy & Harman brazing alloys can be supplied in atomized forms. Control of particle size is extremely close.

The powders are supplied in all standard mesh sizes, and may also be furnished, with the same close controls, to size limitations specified by the customer. Filed powders, produced in coarse-sized particles, are also available. A range of atomization equipment at the Handy & Harman plant enables us to meet wide variations in customer requirements---rapidly and economically. The highest quality of brazing alloy powders is assured be a combination of experience, advanced equipment, and continual research into the latest techniques of melting and automation.

Measurements
Sieve (Screen)
Millimeters
Microns (µ)
Inches
Mils
U.S. Std. Sieve Designation*
Tyler Std. Sieve
0.0254
25.4 0.00100
1.00
-
-
0.0318
31.8 0.00125
1.25
-
-
0.0381
38.1 0.00150
1.50
38 µm (No. 400)
400 mesh
0.0445
44.5 0.00175
1.75
45 µm (No. 325)
325 mesh
0.0508
50.8 0.00200
2.00
-
-
0.0533
53.3 0.00210
2.10
53 µm (No. 270)
270 mesh
0.0635
63.5 0.00250
2.50
63 µm (No. 230)
250 mesh
0.0737
73.7 0.00290
2.90
75 µm (No. 200)
200 mesh
0.0762
76.2 0.00300
3.00
-
-
0.0889
88.9 0.00350
3.50
90 µm (No. 170)
170 mesh
0.1016
101.6 0.00400
4.00
-
-
0.1050
105.0 0.00413
4.13
106 µm (No. 140)
150 mesh
0.1250
125.0 0.00492
4.92
125 µm (No. 120)
115 mesh
0.1490
149.0 0.00587
5.87
150 µm (No. 100)
100 mesh
0.1770
177.0 0.00697
6.97
180 µm (No. 80)
80 mesh
0.2500
250.0 0.00984
9.84
250 µm (No. 60)
60 mesh
0.4200
420.0 0.01654
16.54
425 µm (No. 40)
35 mesh
0.8410
841.0 0.03311
33.11
850 µm (No. 20)
20 mesh
1.0000
1000.0 0.03937
39.37
1 mm (No. 18)
16 mesh