Martensite 17% Cr, AISI 440A, DIN 1.4109 High carbon stainless steel strips in coils

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1 Metric Ton/Metric Tons (Min. Order)
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Overview
Quick Details
Grade:
400 Series
Standard:
AISI, ASTM, DIN, EN, GB, JIS
Thickness:
0.1 - 3.0mm
Width:
250mm approx.
Length:
in coils or straightened lengths
Place of Origin:
Jiangsu, China (Mainland)
Brand Name:
Changjiang
Model Number:
W.-Nr. 1.4109 ( DIN X70CrMo15 ), AISI 440A
Technique:
cold rolled & hot rolled
Application:
high quality knives, scissors, shears, industrial blades etc.
Certification:
ROHS
Surface:
Bright, Black or Hot rolled, pickled, descaled
SupplyAbility
SupplyAbility:
500 Metric Ton/Metric Tons per Month
Packaging & Delivery
Packaging Details
Seaworthy packing, Non -fumigation pallets with waterproof.
Port
Shanghai, China

Martensite 17% Cr, AISI 440A, DIN 1.4109 High carbon stainless steel strips in coils

 

Designations

ChinaUSAJapanGermany

GB 7Cr17

7Cr17Mo

7Cr17MoV

AISI 440A

UNS S44002

JIS SUS440A

EN 1.4109

DIN X70CrMo15

 

Description

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 % )

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

 

Delivery state

Annealed

 

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 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).

 

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