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High Hardness Grade 440C Stainless Steel Round Bar Bright Polished GB ASTM EN

High Hardness Grade 440C Stainless Steel Round Bar Bright Polished GB ASTM EN

Brand Name : WINFAST
Model Number : 440C
Certification : ISO
Place of Origin : China
MOQ : 1 Ton
Price : 2000 USD/Ton
Payment Terms : L/C, T/T
Supply Ability : 120 Ton/Month
Delivery Time : 5 - 8 days
Packaging Details : good packing for export
Products : 440C stainless steel round bar
Other Grade : 304 316L 310S 431 430 410 420 430 440B 440C.etc
Finish : black or bright
length : as request
Diameter : 12 - 250mm
Other shape : flat square
standard : GB ASTM EN
Quality : good
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High Hardness Grade440C Stainless Steel Round Bar Bright Polished / 440C Stainless Steel Shaft

1. Product:440c stainless steel round bar
2. Diameter:From Ø1/4'' to Ø16'' ( Diameter: 6mm~400mm )
3. Length:1~ 6meters or customized size
4. Steel type:440c stainless steel round bar
5. Standard:ASTM 276, ASTM A564, ASTM A582, ASTM A484
6. Surface:Bright, peeled, CNC machined, polished, or black etc, will be as per customers' request
7. Diameter tolerance:H9, H11, H13, K9, K11, K13 etc…as per clients' request etc
8. Length tolerance:0/+50mm
9. Finishing:Solution treated
12. Application:Shipbuilding industry, marine shaft, propeller shaft, transmission shaft
bolt & nuts, machine-made industry, food industry, paper mill equipment.
13. Delivery timeGenerally within 25 days, as per the q'ty.
14. Certificate:ISO, BV, TUV, SGS, mill test certificate
15. Package:Good quality & fumigated wooden box, can better protect the bars. ( See pictures below )
16. Experience::We have much experience in producing the stainless steel round bar, enjoy good reputations.

Stainless 440C is a high-carbon martensitic stainless steel. As a martensitic stainless steel, 440C is magnetic and can be hardened by heat treatment. The high carbon content in 440C provides high hardness and strength. Despite this carbon content, the chromium content is sufficient to retain its stainless characteristics.

Martensitic steels are commonly used in applications where high strength and moderate corrosion resistance is required.




AMS 5630, AMS 5880
ASTM A 276
UNS S44004
W. Nr./EN 1.4125


440C Round Bar


  • Attains the highest hardness of any stainless steel, when heat-treated
  • Highest carbon content of 400 series stainless steels


  • Valve Seats
  • Surgical Instruments
  • Bearings
  • Bushings
  • Nozzles
  • Structural Aircraft Parts

Mechanical Properties

Representative Tensile Properties (Hardened 1900°F, oil quench, and tempered 600°F)

Temperature, °F70
Ultimate Tensile Strength, ksi285
0.2% Yield Strength, ksi275
Elongation, %2
Reduction of Area, %10
Hardness, Brinell580


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