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Spring Steel


Stock list

End applications

springs, washers, disc springs, automotive parts, others

Usage examples

Lawnmower blade :SUP6 (AY)

Lawnmower blade :SUP6 (AY)

Front wheels leaf springs : SUP10 (AY)

Front wheels leaf springs : SUP10 (AY)

Chemical Composition

JIS Chemical Composition(%)
C Si Mn P S Cr V
SUP3 0.75~0.90 0.15~0.35 0.30~0.60 0.035max 0.035max - -
SUP6 0.56~0.64 1.50~1.80 0.70~1.00 0.035max 0.035max - -
SUP7 0.56~0.64 1.80~2.20 0.70~1.00 0.035max 0.035max - -
SUP9 0.52~0.60 0.15~0.35 0.65~0.95 0.035max 0.035max 0.65~0.95 -
SUP10 0.47~0.55 0.15~0.35 0.65~0.95 0.035max 0.035max 0.80~1.10 0.15~0.25

Mechanical properties(hot rolled)

Type of steel Hot-rolled hardness
(HRC)
Annealed hardness
(HRB)
Hardening Tempering
Temperature
(℃)
Hardness(HRC) Temperature
(℃)
Temperature (℃) Hardness(HRC)
JIS SUP 3 44max 95max 830~860
oil quenched
61min 830~860
oil quenched
450~500
air cooled
36min
SUP 6 45max 97max 830~860
oil quenched
54min 830~860
oil quenched
480~530
air cooled
39min
SUP 7 46max 97max 830~860
oil quenched
54min 830~860
oil quenched
490~540
air cooled
39min
SUP 9 38max 90max 830~860
oil quenched
55min 830~860
oil quenched
460~510
air cooled
39min
SUP10 36max 90max 840~870
oil quenched
55min 840~870
oil quenched
470~540
air cooled
39min

Mechanical properties(cold rolled)

Type of steel Annealing Hardness Deep-Drawing Hardness
Standard Special
HV HV HV
JIS
SUP3 ≦190 ≦170 180~280
SUP6 ≦210 ≦190 -
SUP10 ≦190 ≦170 200~260

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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ZIP: 559-0032
5-26, 5-Chome, Nankominami, Suminoe-ku, Osaka, JAPAN

tws.en@tenhiko.co.jp

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