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Quick Details

  • Grade: 400 Series
  • Standard: AISI, ASTM, DIN, EN, GB, JIS
  • Thickness: 0.1 - 3.0mm
  • Width: 250mm approx.
  • Length: in coils
  • Place of Origin: Jiangsu, China (Mainland)
  • Brand Name: Changjiang
  • Model Number: AISI 440A, W.-Nr. 1.4109 ( DIN X70CrMo15 )
  • Technique: Cold Rolled
  • Application: high quality knives, scissors, shears, industrial blades etc.
  • Certification: ROHS
  • Surface: Bright

Packaging & Delivery

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

Stainless Steel 440A Strips in Coil, Annealed, Cold Rolled Bright, Slit Edge




GB 7Cr17




UNS S44002


EN 1.4109

DIN X70CrMo15



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.

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


Chemistry data ( in weight % )

440A0.60 - 0.751.00 max1.00 max0.040 max0.030 max16.00 - 18.000.75 max-


Delivery state



Heat treatment


For maximum softness, this steel should be heated uniformly to 1550/1600ºF (843/871°c).

Soak and cool very slowly in the furnace. Brinell approximately 223.

Intermediate or process annealing treatment---heat uniformly to 1350/1400ºF (732/760°c).

May be cooled in the furnace or air cooled. Brinell hardness about 230.



Preheat to 1400/1500ºF (760/816°c), then heat to 1850/1950ºF (1010/1066°c); soak; quench in warm oil or cool in air.

Do not overheat. When overheated, full hardness cannot be obtained.



Hardness of approximately Rockwell C 56/57 will be obtained on this steel.

To remove peak stresses and yet retain maximum hardness temper at least one hour at 300/350ºF (148/176°c).


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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