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Quick Details

  • Grade: 400 Series
  • Standard: ASTM, AISI, DIN, EN, GB, JIS
  • Length: cut to lengths, straightened
  • Thickness: 1.0 - 16.0mm
  • Width: 250mm approx.
  • Place of Origin: Jiangsu, China (Mainland)
  • Brand Name: Changjiang
  • Model Number: 440A ( 7Cr17, 7Cr17Mo, 7Cr17MoV )
  • Type: Plate
  • Application: high quality cutting tools , surgical instruments
  • Certification: ROHS
  • Surface: Black or hot rolled, pickled, shot blasted
  • Dimensions: Customized

Packaging & Delivery

Packaging Details Seaworth packing, Non - fumigation pallets with waterproof.

Martensitic 440A ( 7Cr17, 7Cr17Mo, 7Cr17MoV ) high carbon stainless steel sheets


This high-carbon high-chromium martensitic stainless steel is designed to provide stainless properties with excellent hardness.

It has moderate corrosion resistance as-annealed which has permitted its use in mild environments.

In some respects it behaves similarly to tool steels.


Type 440A attains a hardness of Rockwell C 56 and maximum toughness when heat treated.

Stainless Type 440A has been used for pivot pins, dental and surgical instruments, cutlery, valve parts, etc.

This steel makes fair permanent magnets.  


440A modified 7Cr17MoV stainless steel contains special element vanadium, - a strong carbide former. The vanadium carbides are also very stable and do not dissolve during heat treatment.


Chemical composition ( in weight % )

C   0.65 - 0.70

Si   0.30 - 0.60

Mn 0.30 - 0.60

P    0.035 max

S    0.030 max

Cr  16.50 - 17.00

Ni   0.30 max

Mo  0.45 - 0.55

V     0.10 - 0.15




GB 7Cr17




UNS S44002


EN 1.4109

DIN X70CrMo15



cutlery, valve components, knives and measuring instruments.


We are looking forward to your enquiries.
Please call +86 151 9025 7143, skype: paul_luhongxiang
or send an email to export@ahoneststeel dot com

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