Spring Steel
- 1. End applications
- 2. Chemical Composition
- 3. Mechanical properties(hot rolled)
- 4. Mechanical properties(cold rolled)
End applications
springs, washers, disc springs, automotive parts, others
Usage examples
Lawnmower blade :SUP6 (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 NIPPON 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 NIPPON STEEL CORPORATION 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.
Please feel free to contact us
ZIP: 559-0032
5-26, 5-Chome, Nankominami, Suminoe-ku, Osaka, JAPAN
