... , Carbon Steel Wire, Spring Wire, Mattress Spring Wire, Spring Wire for Mattress2. Material: MaterialCarbon%Silicon%Manganese%Phosphorus%Sulphur %Chromium%Nickel%Cuprum ... , JIS G3521-1991, DIN17223-1, BS EN10270-14. Main Markets: India, South Korea, Malaysia, Pakistan, Thailand, Philippines, Bangladesh, Sri Lanka, Iran ... , Brazil, South Africa Hard Drawn High Carbon Spring Steel Wire for Mattress