Stainless Steel Precision Hollow Ball


HRGQ has been providing precision hollow stainless balls for variety of industries for over 10 years. Equipped with advanced manufacturing technology, HRGQ guarantee 100% penetrated welding, excellent surface finishing and high tolerance. Based on specific needs, HRGQ's hollow balls also offer precisely weight control, special feature (such as floating in water) or maximum corrosion resistance. HRGQ currently manufactures hollow stainless balls from size 4mm to 150mm mainly in 304,316,316L and 420 stainless steel. Our engineering team are always ready to develop new product for your needs of hollow balls in any material and any specification.

Material Analysis
Type 304 Type 316/316L Type 420
Carbon Maximum of 0.08% Carbon Maximum of 0.08%(316)/0.03%(316L) Carbon Minimum of 0.15%
Manganese Maximum of 2.00% Manganese Maximum of 2.00% Manganese Maximum of 1.00%
Phosphorus Maximum of 0.045% Phosphorus Maximum of 0.045% Phosphorus Maximum of 0.04%
Sulphur Maximum of 0.03% Sulphur Maximum of 0.03% Sulphur Maximum of 0.03%
Silicon Maximum of 1.00% Silicon Maximum of 1.00% Silicon Maximum of 1.00%
Chromium 18.00% to 20.00% Chromium 16.00% to 18.00% Chromium 12.00% to 14.00%
Nickel 8.00% to 11.00% Nickel 10.00% to 14.00% * Per ASTM A276/A276M-16a
* Per ASTM A276/A276M-16a Molybdenum 2.00% to 3.00%
Nitrogen Maximum of 0.10%
* Per ASTM A276/A276M-16a

Mechanical Properties
Type 304 Type 316/316L Type 420
Modulus of Elasticity 29000 Kpsi Modulus of Elasticity 28000 Kpsi Modulus of Elasticity 29000 Kpsi
Elongation In Two Inches 55%-60% Elongation In Two Inches 25%-40% Reduction In Area 25%-50%
Reduction In Area 55%-70% Reduction In Area 55%-65% Tensile Strength 95-250 Kpsi
Tensile Strength 80-180 Kpsi Tensile Strength 80-120 Kpsi Yield Strength 45 Kpsi
Yield Strength 50-150 Kpsi Yield Strength 45 Kpsi

Physical Characteristics
Type 304 Type 316 Type 420
Magnetic Slightly Magnetic Magnetic No Magnetic Yes
Density 0.285 lbs./in3(7.89g/cm3) Density 316: 0.288 lbs./in3(7.97g/cm3)
316L:0.287 lbs./in3(7.94g/cm3)
Density 0.279 lbs./in3(7.72g/cm3)
Corrosion Resistance Good Corrosion Resistance Excellent Corrosion Resistance Fair

Nominal Diameter Grade
4mm-150mm G10-G1000
Other technical requirements such as weight, wall thickness, crush load are according to customers' specification