12.00mm AISI440 G28 Stainless Steel Ball for Bearing Assemble

• Customization: Available
• Customized: Customized
• Certification: ISO
• Model NO.: 12.00
• Standard Parts: Yes
• Universal: Yes
• Type: Bearing Ball
• Material: Stainless Steel
• Quality Grade: G28
• Certifiace: Quality Certificate
• Original Certificate: Yes
• OEM: Workable
• Vacuum Packing: Workalbe
• Transport Package: in Plastic Bag, in Box, in Carton, in Wooden Case
• Specification: 12.00mm
• Trademark: KN STEEL BALL
• Origin: China
• HS Code: 8482910000
• Production Capacity: 100 Tons Per Month

Product Description

Product Description

 

Ball Size: 12.00mm steel ball, Special size customization is available, 
Factory/manufacturer: Supplied from KN STEEL BALL, a professional producer in China with 20 years experiene.

Ball Material:  Chrome steel AISI440    Also could be stainless steel AISI316, AISI52100, Gcr15, 100CR6. AISI304, AISI420, AISI440 AISI440C, And carbon steel, high carbon steel, aluminium, titanium. price vary with different mateiral.

Chrome steel   AISI52100 100Cr6  Gcr15  

Bearing steel  balls are hardened and tempered through their entire diameter to insure uniform structure and hardness. Ball hardness is controlled within a range of HRC 60 - 67 as measured on a parallel surface.

CHEMICAL ANALYSIS	MECHANICAL PROPERTIES
Carbon	0.98 to 1.10%	Tensile Strength	325,000 psi
Chromium	1.30 to 1.60%	Yield Strength	295,000 psi
Manganese	0.25 to 0.45%	Elongation in two inches	5%
Silicon	0.15 to 35%	Reduction in area	8%
Phosphorus	0.025% Max	Modulus of elasticity	29,500,000 psi
Sulfur	0.025% Max	Density	.283 lbs./cu. In.
Nickel	0.25% Max
Molybdenum	0.10% Max

Carbon Steel

Item	C%	Si%	Mn%	P%	S%	Hardness
AISI 1010	0.08~0.13	0.30Max	0.50Max	0.07Max	0.06Max	HRC 58-64
AISI 1015	0.13~0.18	0.10~0.30	0.30~0.60	0.04Max	********
AISI 1045	0.43~0.50	0.10~0.30	0.60~0.90	0.04Max	0.05Max
AISI 1085	0.83~0.88	0.10~0.30	0.30~0.70	0.04Max	0.04Max

Stainless steel  offer excellent corrosion resistance in organic, acid, industrial and marine environments. The non magnetic properties combined with exceptionally high toughness at all temperatures make these steels an excellent selection with many applications. AISI 316 stainless steel offers superior corrosion resistance due to the higher nickel and molybdenum content.
 

Chemical Composition
	302	304	316
Carbon	0.15% max.	0.08% max.	0.08% max.
Chromium	17.00 to 19.00%	18.00 to 20.00%	16.00 to 18.00%
Manganese	2.0% max.	2.0% max.	2.0% max.
Silicon	1.0% max.	1.0% max.	1.0% max.
Nickel	8.00 to 10.00%	8.00 to 10.50%	10.00 to 14.00%
Molybdenum	-	-	2.00 to 3.00%
Mechanical Properties
	302	304	316
Tensile strength	90,000 - 185,000 psi	84,000 - 185,00 psi	84,000 - 185,000 psi
Yield Strength	40,000 - 140,000 psi	42,000 - 140,000 psi	42,000 - 140,000 psi
Elongation in two inches (Annealed)	50%	55%	50%
Modulus of elasticity	28,000,000 psi	28,000,000 psi	28,000,000 psi
Annealed hardness (Rockwell B)	75 - 90	75 - 90	75 - 90
Cold worked hardness (Rockwell C)	25 - 39	25 - 39	25 - 39
Density	.286 lbs./cu.in.	.286 lbs./cu.in.	.288 lbs./cu.in.

440-C Stainless Steel (Martensitic) Balls AISI
440-C stainless steel balls exhibit excellent toughness and hardness properties and offer good corrosion resistance. This material is used extensively in bearing applications where precise tolerances and surface finishes are required.
 

Ball Quality Grade: G100, or other grade G10, G28, G40, G60 G80, G200 G1000, qualigy grade vary price different

Hardness: HRC35
Ball Brand: KN STEEL BALL
Application: For precsion measure meters, ball pens production, bearing production, linear slider production,mobile photo etc.
Packing: in plastic bag, then in box, then in carton, then in wooden case.  Or special packing requied by client.

Delivery terms:  usually 30 days for non-stocked balls.  And 5 days for stocked balls
Quality certificate and material certificate would be issued before each shipping.
PPAP, Control Plan is available for bulk purchase for high precsion steel balls
Sample confirmation before payment/shipping is available, free, by KN STEEL BALL.
We have great advantage from 0.5mm to 3.5mm balls prodctuion
Ball inspection in strict control
 CHINA KN STEEL BALL
Steel balls Inspection report
Production name:  steel ball  Material: stainless steel AISI440    Quality class: G28  Production Lot No. 211016-3

Standard of Quality
Basic diameter tolerance(um)	Diameter tolerance per ball(um)		Lot Diameter Variation(um)			Roundness(um)	Roughness(Ra)			Hardness  (HRC)	Remark
	1		1.4			1	0.05			28-35
Test result
+3.5 ~ +4.5	0.6		1			0.5	0.035			61 -63
Inspection Data
+4.2 +4.0 +4.5 +3.7 +4.3 +4.0 +3.9 +3.8 +3.5 +3.7		0.5 0.4 0.6 0.4 0.6 0.4 0.3 0.5 0.4 0.5			0.3 0.5 0.4 0.4 0.5 0.4 0.3 0.3 0.4 0.5			0.030 0.034 0.030 0.035 0.034 0.030 0.032 0.036 0.033 0.035	62.5 63 62 63 62 62 61.5 63 61.5 62
Final Results	Pass