The balls are normally used in precision ball bearings and many industrial applications. The balls made of this kind material feature excellent surface finish, considerable hardness and a high load carrying capacity, as well as excellent wear and deformation resistance. Chrome steel balls are through hardened in order to achieve the maximum mechanical strength.

Equivalent materials to international standards: AFN 100C6 - B.S.EN31 - JIS G4805 - SUJ2 - ASTM 100C6.

Through hardness index:
Up to 12.70mm HRC 62/66
From 12.70mm to 50.80mm HRC 60/66
From 50.80mm to 70.00mm HRC 59/65
From 50.80mm to 120.00mm HRC 57/63

Chemical composition (%):
C Si Mn P S Cr
0.90 0.15 0.25 0.025 0.025 1.30
1.10 0.35 0.45 max max 1.60

Mechanical properties:
Critical tensile strength: 228 kgf/mm?
Compression strength:   207 kgf/mm?
Modulus of elasticity:   20.748 kgf/mm?
Specific weight:   7.83 kgf/mm?

Steel Ball
In a special production process in accordance with the GB308-2002 and ISO 3290 standards of production and high precision, low noise, high-life bearings for steel ball of the 0.8mm ~ 25.4mm, the accuracy for the G10, G5 and G3, vibration Z3, Z4, Z5 with high precision GCr15 bearing steel materials minisize and medium small size, stainless steel, special material and non-metallic material ball.

Product Use
Seagull Brand Steel Ball in the aviation industry to meet the sophisticated application and uses a lot of the needs of the market following:
1. High-speed, low noise of the special bearings;
2. With different specifications of the ball-point pen stainless steel ball;
3. High-precision, low-noise motor bearings, household appliances bearing;
4. And the general industrial and automotive, motorcycle, bicycle manufacturing industry for supporting the steel ball bearings and micro-electronics industry with the ball;
5. Liquid, gas use such as ball valve.