High Quality Rolling shutter door springs

Heat Treatment Spring Steel Strip

Hardening and Tempering is a thermal process that strengthens steel strips through a controlled heating and cooling process. The hardening process involves heating the steel strip to above the critical transformation temperature for the given grade and then rapidly cooling. The steel strip in this condition is extremely brittle and requires further treatment in the tempering. Then strips are reheated to a lower temperature and holding it at the given temperature for a given period of time. This process is done in an inert atmosphere to avoid oxidation. This type of steel strip has high degree of toughness and has excellent spring properties.

Product Detail

Product Tags

1. Grade: sae1070/sae1075/ck67/ck75/c67s/c75s/c67/c75


3. Certification: ISO9001, SGS

* The regular size(thickness&width) details as below

60 x 1.60 50 x 1.50 65 x 1.20 60 x 1.0
80 x 1.40 45 x 1.50 60 x 1.20 55 x 1.0
65 x 1.40 60 x 1.30 60x1.1 55 x 1.20
50 x 1.0 60 x 1.40 55 x 1.30 50 x 1.20


45 x 1.0 55 x 1.40 50 x 1.30 45 x 1.20
40 x 1.0 50 x 1.40 45 x 1.30 40 x 1.20
45 x 1.40 40 x 1.30 35 x 1.20 45x1.1
40 x 1.40 1.25x50 50x11 1.4x70
h&t steel strip 32

* Our Advantage:

1. Long Experience: 10years of warehousing and sales experience.
2. High and consistent quality, quantity is with preferential treatment.
3. Strong Ability to supply and Short Delivery Time: Warehouse is located around office, so according to the quantity of the order, the goods can release quickly.
4. Transportation Speed is quick.Near to Shanghai port.
5. Many Exporting Countries:Products have already been exported to the United States, Australia, Russia, Ukraine,Pakistan,Korea and other countries.
6. Reliable Suppliers:All company products are from large domestic steel mills, including: Shandong Iron and Steel, Tangshan Iron and Steel, Handan Iron and Steel and so on.
7. Strong Partners: Chinese Government, State-owned Enterprises, Listed Enterprises are all partners of the company.
8. Bottom and competitive Price
9. Reliable Quality and Service
10. Buyer's Specifications Accepted


Q1. What are your company's main products ?
A1: Our main products are steel plate/sheet, coil,Rolling shutter door spring, spring box, Cuting blade.

Q2. How do you control quality ?
A2: Mill Test Certification is supplied with shipment, Third Party Inspection is available. and we also get ISO, SGS, Alibaba.Verified.

Q3. What are the advantages of your company ?
A3: We have many professionals, technical personnel, more competitive prices and best after-dales service than other steel companies.

Q4. How many coutries you already exported ?
A4: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan,India, etc.

Q5. Can you provide sample ?
A5: We can provide the samll samples in stock for free, as long as you contact us.
Customized samples will take about 3-5days.

*Note: If you have any question, please feel free to click “Contact Supplier” as below,we will get back to you immediately.

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