CS70 Annealed (1.1231)
CS70 carbon steel, also known as C67S or AISI/SAE 1070, is a high-carbon steel within BS1449, widely used for the manufacture of springs and precision-formed components.
In the annealed condition (185 VPN max), CS70 is easy to press, form, and shape. After forming, the steel is typically hardened and tempered to achieve optimal spring properties and strength.
BSS stocks CS70 in sheet and coil form, ready for industrial or engineering use.
High carbon steel for spring and tooling applications
Annealed condition for easy forming and pressing
Equivalent grades: C67S, AISI/SAE 1070
Stock range: 0.3mm to 3mm sheet thickness
Coil minimum quantity: 10 kg
Manufactured and stocked in ISO9001 certified facility
An alternative grade for light spring manufacturing, without the necessity to heat treat after forming is 301 spring temper stainless. BSS stock a wide range of 301. If you need more information call us.
CS70 Carbon Steel Chemical Composition
CS70 Carbon Steel
Carbon – 0.65 – 0.75%
Manganese – 0.5 – 0.9%
Silicon – 0.05 – 0.35%
Phosphorous – 0.045% max
Sulphur – 0.045% max
CS70 Stock & Range
- Annealed sheets: 0.3mm – 3mm thick
- Coil minimum: 10 kg
- Single sheets available on request
- Requires heat treatment to achieve spring hardness and properties
Why Choose BSS for CS70 Carbon Steel?
📦 UK stock with fast delivery
⚙️ Suitable for engineering, spring-making, and forming applications
🔍 Technical support for heat treatment and forming guidance
✅ ISO9001 certified supplier
Contact us
Not available online in full sheets.
Please contact Nicole to find out more.
Off-cuts of this item may be available in Off-Cuts Corner.
+44 114 244 0527 Option 2
Available
Mon - Thurs: 8.30am - 5.00pm
Fri: 8.30am - 3.45pm
Sat - Sun: Closed