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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
  • Type: Plate
  • Application: high quality cutting tools , surgical instruments
  • Certification: SGS
  • Surface: Bright, black or hot rolled, pickled, shot blasted
  • Dimensions: Customized
  • Reliable factory: Professional sales team

Packaging & Delivery

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

440A High carbon, stainless steel plates / sheets

 

Designations

ChinaUSAJapanGermany

GB 7Cr17

7Cr17Mo

7Cr17MoV

AISI 440A

UNS S44002

JIS SUS440A

EN 1.4109

DIN X70CrMo15

 

Description

Steel Type 440A is a high-carbon martensitic stainless steel developed to provide stainless properties with maximum hardness.

It is magnetic in both the annealed and hardened conditions.

Maximum hardness and corrosion resistance are available only in the hardened or hardened and stress relieved conditions,

so the alloy is not used in the annealed or annealed and tempered conditions. Dental and surgical instruments and cutlery

are frequent applications for Type 440A.

 

Chemistry data ( in weight % )

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

 

Forms of supply

In coils or cut into certain lengths.

 

Dimensions

Thickness:mmWidth:mm
MinMaxMinMax
1.016.0 250

* Other sizes can be supplied to meet specific requirements.

 

Delivery state

Annealed

 

Applications

Beauty instruments like barber scissors, outdoor knives; industrial parts, etc.

 

Physical data

Specific Gravity 7.68 g/cm3

Density 0.2770 Ib/in.3

 

Heat treatment

Annealing

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.

 

Hardening

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.

 

Tempering

Hardness of approximately Rockwell C56/57 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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