High-Carbon Steel Strip & Coil

Precision-Slit – ISO 9001:2015 – Since 1976

Tool King, Inc. has spent nearly five decades perfecting the art of narrow-width slitting, edging, and custom coil packaging. From our ISO 9001:2015–certified facility in Wheeling, Illinois, Tool King processes high-carbon strip every day for customers in automotive, appliance, tooling, electronics, medical, restaurant equipment, spring manufacturers and dozens of niche OEM markets. All material is sourced from conflict-free mills and backed by bilingual service and rapid turn-around.

Alloys & Tempers

1050 Cold Rolled Annealed Spring Steel

Cold rolled and annealed 1050 spring steel offers a balance of strength and workability, making it well-suited for parts that require post-fabrication heat treating. It delivers consistent surface finish and dimensional control for applications like blades, clips, flat springs, and washers.

Specifications – ASTM A 684-14; RB 82 max.
Generally used when hardening and tempering is required after fabrication
Some applications are for brackets, blades, clips, springs and washers

1074/1075 Cold Rolled Annealed Spring Steel

This medium-high carbon alloy combines good formability in the annealed state with excellent hardening response after heat treatment. 1074/1075 is ideal for stamped parts that need strength and resilience, such as spring clips, brackets, and tools.

Specifications – ASTM A 684-14; RB 88 max.
Generally used as a medium carbon grade alloy with good forming qualities and good results when hardened and tempered
Some applications are for brackets, blades, clips, springs and washers

C1074/C1075 Scaleless Blue Tempered Spring Steel

Pre-tempered and scaleless, C1074/C1075 blue spring steel is ready to use without further heat treating. It’s a durable, wear-resistant option for coil, leaf, or recoil springs where a polished finish isn’t required.

Specifications – RC 44-47 (.010”- .062”); RC 44-50 (.094”-.125”)
Generally used as medium high carbon alloy with good forming qualities when higher carbon and polished surface are not required
Some applications are for various types of springs

Learn more about C1074/C1075 Spring Steel

1095 Cold Rolled Annealed Spring Steel

1095 is the highest carbon content grade among commonly used spring steels, offering exceptional hardness potential and precision formability in the annealed state. It’s often selected for intricate stampings or tight-tolerance shapes that can’t be made from pre-tempered material.

Specifications – ASTM A 684-14; RB 88 max.
Generally used when elasticity and fatigue limits are not critical, although it has the highest rated values of the commonly used spring steel alloys
It is used for intricate shapes that cannot be formed from pre-tempered steel

C1095 Blue Tempered & Polished (BP) Spring Steel

This pre-hardened, polished spring steel features a deep blue finish and high hardness (RC 48–51) right out of the coil. C1095 BP is widely used in electronic connectors, motor brushes, and mechanical springs requiring fine tolerance and spring-back.

Specifications – Rockwell C 48-51
Finish – Deep blue & polished
Generally used for electrical & electronic applications, coil or flat mechanical springs

Learn more about Blue Polished Tempered Spring Steel

Why Manufacturers Specify High-Carbon Spring Steel

High strength & wear resistance: Ideal for parts that must keep their shape under load and friction.
Excellent elasticity & fatigue life: Grades 1050 through 1095 offer the rebound required in demanding spring applications.
Tight edge-condition control: Round, square, or full-natural edges reduce tooling wear and improve safety during handling.
Cost-effective performance: Delivers high hardness without expensive alloying additions.

What Makes Tool King the Smarter Choice?

Ultra-narrow slitting: Down to .090 in. with ultra close width tolerances for miniature stampings and electronic laminations.
Edge conditioning & skiving in-house: Square, round-rolled, or deburred edges shipped ready for your press lines.
Oscillate-wound & traverse wound spools: Up to 15× more footage per spool, slashing change-over time and scrap.
Responsive, bilingual service: Get answers fast whether you call in English or Spanish.
Sustainability & compliance: Conflict-free sourcing, RoHS compliance (Directive 20/15/863/EU Reach Proposition 65), HR4173 Conflict Minerals Law.

Frequently Asked Questions

What thicknesses and widths can I order?
We slit as light as .003 and as heavy as .125 thick. Width as narrow as .090 and we can slit up to 36 inch.

Can you supply material oscillate-wound?
Yes. Oscillate (traverse) winding is one of our core packaging services and can boost your press uptime dramatically.

Do you offer blue-tempered strip?
Both C1075 and C1095 are stocked in scaleless & blue-tempered & polished condition for applications needing high hardness out of the box.

What are your minimum order quantities?
Most grades are available starting at 25 pounds per size; call for stock checks on light-gage or specialty tempers.

Will I receive certification?
Mill test reports (MTRs) and Tool King’s ISO 9001 certificate ship with every order for full traceability.

Your Trusted High-Carbon Steel Strip and Coil Supplier

Request pricing or schedule a coil-trial run now—contact Tool King at 847-537-2881 or submit our inquiry form.