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Alloy Tool Steel

End applications

materials for cold-rolled steel strip, circular saws, beltsaws, buzz saws, metal band saws, chain saw guides, music box sound pegs, cutter, diaphragm springs,

Chemical Composition

Nisshin standards JIS
Chemical Composition(%)
C Si M n P S N i Cr W V
SKS5 0.75~0.85 0.35max 0.50max 0.030max 0.030max 0.70~1.30 0.20~0.50 - -
SKS51 0.75~0.85 0.35max 0.50max 0.030max 0.030max 1.30~2.00 0.20~0.50 - -
NKS32 0.77~0.83 0.35max 0.50max 0.030max 0.030max 2.00~2.50 0.25max - -
NKS36 0.85~0.95 0.35max 0.40~0.60 0.030max 0.030max 0.40~0.70 0.25~0.45 - -
NKS37 0.85~0.95 0.35max 0.50max 0.030max 0.030max 0.70~1.30 0.50max - -
NKS39 1.10~1.20 0.35max 0.50max 0.030max 0.030max 0.70~1.30 0.50max - -
NKS41 0.75~0.85 0.35max 0.50max 0.030max 0.030max 1.30~2.00 0.50max - 0.20~0.30
NKS49 0.90~1.00 0.35max 0.50max 0.030max 0.030max - 0.20~0.40 - -
NKS52 0.90~1.04 0.35max 0.60~0.90 0.030max 0.030max - 0.20~0.40 - -
NKS56 1.10~1.30 0.35max 0.50max 0.030max 0.030max - 0.20~0.50 - -
NKS59 0.80~0.90 0.35max 0.80~1.00 0.030max 0.030max - 0.40~0.60 - -
NKS60 0.80~0.87 0.35max 0.50max 0.030max 0.030max - 0.40~0.60 - 0.25~0.35
NKS1 0.95~1.05 0.15~0.35 0.500max 0.030max 0.030max 0.70~1.30 0.20~0.50 - 0.10~0.20

Mechanical properties(hot rolled)

Hardening Tempering

Hardness

(HRC)

Annealing Hardness
(HRB)
Type of steel Temperature(℃) Hardness(HRC) Temperature(℃)
Temperature(℃)
Nisshin standard NKS32 800~850
oil quenched
61min 800~850
oil quenched
400~500
air cooled
45min 95max
NKS36 800~850
oil quenched
61min 800~850
oil quenched
400~500
air cooled
45min 97max
NKS37 800~850
oil quenched
62min 800~850
oil quenched
150~200
air cooled
60min 97max
NKS39 800~850
oil quenched
64min 800~850
oil quenched
150~200
air cooled
63min 97max
NKS41 790~850
oil quenched
58min 790~850
oil quenched
150~200
air cooled
56min 96max
NKS49 790~850
oil quenched
61min 790~850
oil quenched
150~200
air cooled
59min 100max
NKS52 790~850
oil quenched
62min 790~850
oil quenched
150~200
air cooled
60min 100max
NKS56 790~850
oil quenched
64min 790~850
oil quenched
150~200
air cooled
63min 98max
NKS59 790~850
oil quenched
62min 790~850
oil quenched
150~200
air cooled
60min 100max
NKS60 790~850
oil quenched
62min 790~850
oil quenched
150~200
air cooled
59min 100max
NKS1 850~900
oil quenched
64min 790~850
oil quenched
150~200
air cooled
60min 100max
JIS SKS 5 800~850
oil quenched
61min 800~850
oil quenched
400~500
air cooled
45min 98max
SKS51 800~850
oil quenched
61min 800~850
oil quenched
400~500
air cooled
45min 98max

Mechanical properties(cold rolled)

Type of steel Annealing Hardness Deep-Drawing Hardness
Standard Special
HV HV HV
Nisshin
Standard

NKS32 ≦200 ≦180 200~280
NKS36 ≦200 ≦180 200~280
NKS37 ≦200 ≦180 200~300
NKS41 ≦200 ≦180 200~260
NKS49 ≦220 ≦200 220~280
NKS56 ≦220 ≦200 220~320
NKS59 ≦220 ≦200 220~280
NKS60 ≦200 ≦180 220~280
JIS
SKS5 ≦190 ≦180 200~280
SKS51 ≦190 ≦180 200~280

For more information on Nisshin Steel materials, click the link below.
Click here for hot rolled catalog
Click here for cold rolled catalog

Notice

These material information in this page is based on Nisshin Steel Co.,Ltd. product catalog.

There are some cases maker do not accept the production depending on the production lot and specification.

Technical information in this website,while every reasonable effort was made to ensure the accuracy at the time of this publication, is general information relating to our products only and is not meant as any warranty,expressed or implied.
Such technical information does not guarantee that any of our products are suitable for your particular application or purpose. Use of any information contained in this website shall be at user's risk. Any information in this website is subject to change without prior notice. Please contact our company for up-dated information.

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