440C Stainless steel ball is a type of modern steel and famous for its high corrosion resistant, wear resistance, strength and hardness qualities among all the stainless alloys, capable of attaining (after heat treatment) the highest hardness (60 HRC). It has good resistance to the atmosphere, fresh water and mild acids. It has best resistance in the hardened, tempered and passivated condition. It allows creating a smooth polished surface and Razor sharp edges. It is being used in rolling element bearings, valve seats, casters, ball bearings and valve parts.
420 is a martensitic stainless steel with 12% Chromium which is sufficient to give good corrosive resistance properties. .It's best corrosive resistance is when hardened and surface is ground or polished. It has good ductility in the annealed condition but can be hardened up to 500HB (highest of the chromium grades) due to its excellent harden-ability, it is capable of getting hardened up to 56 HRC Rockwell or higher. Martensitic Grades are known for high hardness and allowances must be made for poor weld ability and usually allowances for a final harden and temper treatment. 420 steel is magnetic and welding is not recommended. Material will not pass the 72 hours salt bath test.
316 stainless steel is Austenitic stainless steel with features similar to AISI 302/304/304L series, but they can be anti-magnetic and, above all, the addition of molybdenum offers greater chemical resistance, particularly in sulfuric acid concentration. All balls can be annealed and passivated. The most common applications include their use in the chemical, paper and textile industries (valves, pumps and bearings).Basic Info.
Model NO.:1mm 25mm
Original:Changzhou, Jiangsu, China
Material:AISI304 AISI 316
Surface:Bright, Zero Defect
Package:10kg of Each Carton
Qingdao Fuqin Imp. & Exp. Co., Ltd. It is aprofessional export company for the manufactures.The morther companies are steel ball and roller plants.The steel ball plant was founded in 1998. It is professional ball manufacturer.We have received ISO9001.The roller plant was found in 2000. It is professional roller manufacturer. We have received ISO/TS16949.
Carbon steel balls
Light duty bearing,Conveyer belt,
Bicycle parts,Automobile parts,
Slide bearing,Caster wheels,
Computer peripheral products,
Toys,Metal milling,Hand tools and etc.
Low Carbon-AISI 1010-1015
Chrome steel balls
Chrome steel - GCr15/100Cr6/AISI 52100/SUJ-2
|SUJ2||0.95 or 1.10||0.15 or 0.35||0.50 max||1.30~1.60|
Stainless steel ball
Caption: The Applications
For 300 series
Trigger sprayers,Bearings,Dispenser valves,
Body jewelry lotion pumps,Aerospace,Quick
For 400 series
Bearing applications,Valve applications,
Stainless steel - AISI 302/304/304L/316/316L
|Slightly magnetic,flat surface HRC 25min.|
|Better corrosion resistance than SS304 specially against Sulfuric|
acid and ink/bleach/nitric
flat surface HRC 50min,
better corrosion resistant
|Ferritic stainless steel,better corrosion resistant than 3series at higher temperature|
|Martensite,fair corrosion to water,alcohol,oil and food product.|
Materials and Characteristics
|Material||Polyacetal||Nylon 66||Polypropylene||20% Teflon+80% Delrin|
Rockwell R scale
Factory tour inspection
Step 1: Weighing stainless steel balls. Usually the weight is about 10kg.
Step 2: Sealed plastic bags
Step 3: Put sealed plastic bags into small boxes.
Step 4: Each box has the label, including material, Lot No. size, quantity, grade, date......
Step 5: Each box directly put into mooden case.
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