Leading Provider of

Stainless Steel

Opening Times

Mon - Sat: 7.00 - 18:00

Get in touch

enquiry@harshsteel.com

UNS S44000 Round Bars, SS 440 Round Bars, Stainless Steel 440 Round Bars Supplier, Manufacturer and Exporter in India


Din 1.4125 SS 440 Round Bars, SS UNS S44000 Round Bars, Stainless Steel 440 Round Rods, 440 Stainless Steel Round Bars Suppliers in India.

STAINLESS STEEL 440 ROUND BARS GENERAL PROPERTIES:

Stainless steels are high-alloy steels which have high corrosion resistance compared to other steels due to the presence of large amounts of chromium. Based on their crystalline structure, they are divided into three types such as ferritic, austenitic, and martensitic steels. Another group of stainless steels are precipitation-hardened steels. They are a combination of martensitic and austenitic steels. Grade 440C stainless steel is a high carbon martensitic stainless steel. It has high strength, moderate corrosion resistance, and good hardness and wear resistance. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts.


STAINLESS STEEL 440 ROUND BARS APPLICATIONS:

Typical applications include:

  • Rolling element bearings
  • Valve seats
  • High quality knife blades
  • Surgical instruments
  • Chisels

STAINLESS STEEL 440 ROUND BARS CORROSION RESISTANCE:

Good resistance to the atmosphere, fresh water, foods, alkalies and mild acids. Best resistance in the hardened and tempered and passivated condition. A smooth polished surface also assists.


The corrosion resistance of grade 440C approximates that of grade 304 in many environments.


STAINLESS STEEL 440 ROUND BARS HEAT RESISTANCE:

Not recommended for use in temperatures above the relevant tempering temperature, because of reduction in mechanical properties by over-tempering.


STAINLESS STEEL 440 ROUND BARS HEAT TREATMENT:

Annealing – Full anneal – 850-900°C, slow furnace cool to about 600°C and then air cool. Sub-critical Annealing – 735-785°C and slow furnace cool.

Hardening – Heat to 1010-1065°C, followed by quenching in warm oil or air. Oil quenching is necessary for heavy sections. Immediately temper at 150-370°C to obtain a wide variety of hardness values and mechanical properties as indicated in the accompanying table.

Tempering in the range 425-565°C is to be avoided because of reduced impact resistance and corrosion resistance. Tempering in the range 590-675°C results in lower hardness (the product become machinable) and high impact resistance.


STAINLESS STEEL 440 ROUND BARS WELDING:

If welding is necessary pre-heat at 250°C and follow welding with a full anneal. Grade 420 filler will give a high hardness weld (although not as high as the 440C), but 309 or 310 will produce soft welds with higher ductility.


STAINLESS STEEL 440 ROUND BARS MACHINING:

In the annealed condition this grade is relatively easily machined; approximately the same as for high speed steel. Chips are tough and stringy so chip breakers are important. If these grades are hardened machining becomes more difficult and probably impossible.


STAINLESS STEEL 440 ROUND BARS COMPOSITION:

Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

440C

min.

max.

0.95

1.20

-

1.00

-

1.00

-

0.040

-

0.030

16.00

18.00

-

0.75

-

-

STAINLESS STEEL 440 ROUND BARS MECHANICAL PROPERTIES:

Tempering Temperature (°C)

Tensile Strength (MPa)

Yield Strength 0.2% Proof (MPa)

Elongation (% in 50mm)

Hardness Rockwell (HR C)

Impact Charpy V (J)

Annealed*

758

448

14

269HB max#

-

204

2030

1900

4

59

9

260

1960

1830

4

57

9

316

1860

1740

4

56

9

371

1790

1660

4

56

9

* Annealed properties are typical for Condition A of ASTM A276# Brinell Hardness is ASTM A276 specified maximum for annealed 440A, B and C.

STAINLESS STEEL 440 ROUND BARS PHYSICAL PROPERTIES:

Grade

Density (kg/m3)

Elastic Modulus (GPa)

Mean Coefficient of Thermal Expansion (mm/m/°C)

Thermal Conductivity(W/m.K)

Specific Heat
0-100°C (J/kg.K)

Electrical Resistivity (nW.m)

0-100°C

0-200°C

0-600°C

at 100°C

at 500°C

440 C

7650

200

10.1

10.3

11.7

24.2

-

460

600

POSSIBLE ALTERNATIVE GRADES:-

Grade

Why it might be chosen instead of 440C

440A/B

Slightly softer and more corrosion resistant grade needed

440F

High machinability required, with same hardness and hardenability as 440C

420

Lower strength and hardness needed than any of the 440 grades

416

Higher machinability required, and the much lower hardness and strength is still adequate

Harsh steel Supplies and Exports Stainless steel 440 Strips from 2.5mm wide to 400mm, slit to close tolerances. We supply in below specifications:-


Cold Drawn Stainless steel Wire Round Bars
Application :
Machined Components, Pump Shafts, Valves, Fasteners, Machine Tools, Dairy Equipments, Surgical & Medical Parts, Threaded Bars, Studs, Bolts, Pins, Hinges and Handles.


Condition

Cold Drawn & Polished

Cold Drawn, Centre less Ground & Polished

Cold Drawn, Centre less Ground & Polished (Strain Hardened)

Grades

Alloy 286,Alloy 20, 202, 303, 304, 304L, 310, 316, 316L, 32, 410, 420, 416, 430, 431, 430F , 630, 17-4ph, Duplex steel 2205

304, 304L, 316, 316L

Diameter (Size)

2 mm to 5mm (1/8" to 3/16")

6mm to 22m (1/4" to 7/8")

10mm to 40mm (3/8" to 1-1/2")

Diameter Tolerance

h9 (Din 671),h11
ASTM A 484

h9 (Din 671)
ASTM A 484

h9 (Din 671),h11
ASTM A 484

Length

3/4/5.6/6 meter
(12/14ft/20feet)

3/4/5.6/6 meter
(12/14ft/20feet)

3/4/5.6/6 meter
(12/14ft/20feet)

Length Tolerance

-0/+200mm or
+100mm or +50mm 
(-0 ”/+1 feet or +4 ” or 2 ”)

-0/+200mm or
+100mm or +50mm 
(-0 ”/+1 feet or +4 ” or 2 ”)

-0/+200mm 
(-0 ”/+1 feet)

Peeled Turned Polished Stainless Steel Round Bars and Stainless steel forged Bars:


Condition

Peeled, Centreless Ground & Polished

Peeled & Polished

Peeled 
(Rough Turned)

Forged,
Rough Turned

Grades

Alloy 286,Alloy 20, 202, 303, 304, 304L, 310, 316, 316L, 32, 410, 420, 416, 430, 431, 430F , 630, 17-7,17-4ph, Duplex steel 2205, Duplex steel 2507

304, 304L, 316, 316L, 410, 416, 420, 431, 17-4Ph

303, 304, 304L, 316, 316L, 410, 416, 420, 431, 17-4 ph

Diameter (Size)

20mm to 85mm 
(3/4 ” to 3--1/4 ”)

85mm to 140mm
(3-1/4 ” to 4--3/4 ”)

25mm to 140mm
(1 ” to 5--1/2 ”)

150mm to 400mm (6 ” to 16 ”)

Diameter Tolerance

h9 (Din 671) tolerance
ASTM A 484

h41 tolerance

K12/K13
(Din 1013)

-0mm/+3mm
(-0 ”/+0.12 ”)

Length

3/4/5.6/6 meter
(12feet /14feet/20feet)

3/4/5.6/6 meter
(12feet/14feet/20feet)

3/4/5.6/6 meter
(12feet/14feet/20feet)

3 meter -5 meter
10 feet -16 feet

Length Tolerance

-0/+200mm or
+100mm or +50mm 
(-0 ”/+1 feet or +4 ” or 2 ”)

-0/+200mm or
+100mm or +50mm 
(-0 ”/+1 feet or +4 ” or 2 ”)

-0/+1000mm or 500mm (-0 ”/+3 feet or +2 feet)

-0/+2 meter-
-0/+6 feet

We export our STAINLESS STEEL 440 ROUND BARS products to Western and Eastern Europe, Saudi Arabia, Bangladesh, United States, United Arab Emirates, Canada, Angola, Argentina, Austria, Azerbaijan, Pakistan, Peru, Chile, Spain, France, United Kingdom, Indonesia, Israel, Iran, Kuwait, Mexico, Malaysia, Nigeria, Serbia, Singapore, Taiwan, Chile, Venezuela, Ecuador, Netherlands, Brazil, Colombia, Ghana, Iran, Denmark, Poland, Australia, Afghanistan, Bahrain, Costa Rica, Egypt, Iraq, Jordan, South Korea, Kazakhstan, Sri Lanka, Lithuania, Norway, Oman, Philippines, Poland, Qatar, Russia, Vietnam, South Africa, Nigeria, Mexico, Turkey, Hungary, Algeria, Belarus, Belgium, Bhutan, Bolivia, Bulgaria, Croatia, Czech Republic, Estonia, Finland, Greece, Italy, Japan, Libya, Romania, Thailand, Trinidad & Tobago,Tunisia, Ukraine, Yemen, Hong Kong, Gabon, China, Portugal, Switzerland, New Zealand, Sweden, Slovakia, Kenya, Lebanon, Morocco, Mongolia etc. We are sure that we also can cover the requirements requested by your company you can email us at harshsteel@ymail.com for your instant requirements.




Enquiry







OUR SUMMARY:
Reviewer :
Harsh steel
Review Date :
Reviewed Product :
STAINLESS STEEL 440 ROUND BARS / UNS: ASTM/ASTE S44000 / DIN: 1.4125
Author Rating
5starstarstarstarstar