Chinese Professional Stainless Ball - 440C stainless steel balls high quality precision – Mingzhu

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Chinese Professional Stainless Ball - 440C stainless steel balls high quality precision – Mingzhu Detail:

440C stainless steel balls render a great integral hardness, with a remarkable resistance to corrosion caused by water, steam, air as well as by gasoline, oil and alcohol. High degree of surface finish and very precise size tolerances make this type of stainless steel are the best for the usage in stainless steel high precision ball bearings, valves, ball pens and other stiff environment application.

440C steel is similar to 440 steel. It has a higher C chemical content, so the hardness is also higher than 420.

Specification

440C stainless steel

Diameters

2.0mm – 55.0mm

Grade

G10-G500

Application

ball bearings, oil refinery valves, ball point pens

Hardness

440C stainless steel

According to DIN 5401:2002-08

According to ANSI/ABMA Std. 10A-2001

over

up to

all

all

55/60 HRC

58/65 HRC

Equivalence Of Material

440C stainless steel

AISI/ASTM(USA)

440C

VDEh (GER)

1.4125

JIS (JAP)

SUS440C

BS (UK)

-

NF (France)

Z100CD17

ГОСТ(Russia)

95X18

GB (China)

9Cr18Mo

Chemical Composition

440C stainless steel

C

0.95% - 1.20%

Si

≤1.00%

Mn

≤1.00%

P

≤0.04%

S

≤0.03%

Cr

16.00% - 18.00%

Mo

≤0.75%

Our Advantage

● We have been engaged in steel ball production for more than 26 years;

● We offer a great variety of sizes ranged from 3.175mm to 38.1mm. The size spreadsheet can be referred as follows;

● We have a wide stock availability. Most of the standard sizes (3.175mm~38.1mm) and gauges (-8~+8) are available, which can be delivered immediately;

● Non-standard sizes and gauges can be manufactured under special request (such as 5.1mm, 5.15mm, 5.2mm, 5.3mm 5.4mm for seat track; 14.0mm for cam shaft and CV joint, etc.);

● Each batch of balls is inspected by sophisticated machines: roundness tester, roughness tester, metallographic analysis microscope, hardness tester (HRC and HV) to guarantee the quality.

440C-stainless-steel-balls-7
440C-stainless-steel-balls-6

Size Spreadsheet

SIZE SPREADSHEET

(mm)

(inch)

(mm)

(inch)

3.175

1/8″

8.7

-

3.5

-

8.731

11/32″

3.969

5/32″

9.0

-

4.0

-

9.525

3/8″

4.2

-

10.0

-

4.4

-

10.3188

13/32″

4.5

-

11.0

-

4.63

-

11.1125

7/16″

4.7

-

11.5094

29/64″

4.7625

3/16″

11.9062

15/32″

4.8

-

12.0

-

4.9

-

12.3031

31/64″

5.0

-

12.7

1/2″

5.1

-

13.0

-

5.1594

-

13.4938

17/32″

5.2

-

14.0

-

5.25

-

14.2875

9/16″

5.3

-

15.0812

19/32″

5.35

-

15.0

-

5.4

-

15.875

5/8″

5.5

-

16.0

-

5.5562

7/32″

16.6688

21/32″

5.6

-

17.4625

11/16″

5.9531

15/64″

19.05

3/4″

6.0

-

20.0

-

6.35

1/4″

20.637

13/16″

6.5

-

22.0

-

6.7469

17/64″

22.225

7/8″

7.0

-

23.8125

15/16

7.1438

7/32″

25.4

1″

7.5

-

30.1625

1 3/16″

7.62

-

32.0

-

7.9375

5/16″

38.1

1 1/2″

8.0

-

FAQ

Q: How do I choose the appropriate stainless steel brand (304(L)/316(L)/420(C)/440(C))? What are the main differences between 300 and 400 series stainless steel balls?
A:  To choose the proper steel brand for stainless steel balls, we should get to know well the properties of each brand and the application of the balls. The most common used stainless steel balls can be divided simply in two groups: 300 series and 400 series.
300 series “austenitic” stainless steel balls contain more chromium and nickel elements and are theoretically non-magnetic (actually are very low-magnetic. Totally non-magnetic require additionally heat treated.). Normally they are produced without the heat treatment process. They have better corrosion resistance than 400 series (in fact, the highest corrosion resistance of the stainless group. Although 300 series balls are all quite resistant, however 316 and 304 balls show different resistance to some substance. For more details, please refer to pages of different stainless steel balls) . They are less brittle, so can be applied also for sealing use. 400 series stainless steel balls contain more carbon, which makes it magnetic and more hardness. They can be easily heat treated like chrome steel balls or carbon steel balls to increase hardness. 400 series stainless steel balls are commonly used for applications that demand water-resistance, strength, hardness and wear resistance.

Q: What standards do you adhere to for manufacturing?
A: Our products are in compliance with the following standards industrial for steel balls:
● ISO 3290 (INTERNATIONAL)
● DIN 5401 (GER)
● AISI/ AFBMA (USA)
● JIS B1501 (JAP)
● GB/T308 (CHN)

Q: Do you offer free samples for test?
A: Yes, we provide free samples to test and check quality.

Q: How long is your lead time?
A: Generally it takes around 3-5 days if the products are in stock. Or else the estimated lead time should be worked out according to your specific quantity, material and grade.

Q: We are not familiar with the international transportation. Will you handle all logistics?
A: Definitely, we deal with the logistic issues with our cooperated international freight forwarders with years’ of experience. The customers only need to provide us the basic information

Q: How is your packaging method?
A: 1. Conventional packaging method: 4 Inner boxes (14.5cm*9.5cm*8cm) per master carton (30cm*20cm*17cm) with dry plastic bag with VCI anti-rust paper or oiled plastic bag, 24 cartons per wooden pallet (80cm*60cm*65cm). Each carton weighs roughly 23kgs;
2.Steel drum packaging method: 4 steel drums (∅35cm*55cm) with dry plastic bag with VCI anti-rust paper or oiled plastic bag,4 drums per wooden pallet (74cm*74cm*55cm);
3.Customized packaging as per customer’s requirement.


Product detail pictures:

Chinese Professional Stainless Ball - 440C stainless steel balls high quality precision  – Mingzhu detail pictures

Chinese Professional Stainless Ball - 440C stainless steel balls high quality precision  – Mingzhu detail pictures

Chinese Professional Stainless Ball - 440C stainless steel balls high quality precision  – Mingzhu detail pictures

Chinese Professional Stainless Ball - 440C stainless steel balls high quality precision  – Mingzhu detail pictures

Chinese Professional Stainless Ball - 440C stainless steel balls high quality precision  – Mingzhu detail pictures


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  • High production efficiency and good product quality, fast delivery and completed after-sale protection, a right choice, a nice choice.
    5 Stars By Philipppa from Cologne - 2018.05.13 17:00
    The company can keep up with the changes in this industry market, product updates fast and the price is cheap, this is our second cooperation, it's good.
    5 Stars By Evangeline from Congo - 2017.08.18 18:38