SK85 (SK5) steel is Japanese high-grade carbon tool steel, cold work die steel, high carbon steel with a mass fraction of carbon above 0.80%. SK85 (SK5) steel hardness after quenching is 50~60HRC. It has high hardness, excellent wear resistance, and easy spheroidization.
Due to its workability, hardenability and cost-effectiveness, SK85(SK5) material widely used in a wide range of tools (such as utility knives, scalpel blades, long edged tools, cutting tools etc.).
Why Choose Us
1. Consistent Quality – Quality is Our Lifeline
With great majority of raw materials from Baosteel, we ensure full in-house production control. Complete testing of mechanical properties with guaranteed thickness/width tolerance compliance.
2. Export Specialists – We Handle the Complexities
As 10+ years serving major overseas manufacturers, we can professionally handle the requirements of compliance, documentation, and shipping with proven track record.
3. Convenient Resources – As Easy As Local Supply
Flexible orders from small batches to large volumes. Multiple shipping options(LCL, FCL, Bulk Carrier) with dedicated after-sales support and regular customer visits.
4. Low Minimum Order & Sample Availability
We accept small orders starting from 0.5–5 tons and provide samples for evaluation, helping you verify quality before bulk purchasing.
Product Serve
| Grade | SK85 (SK5) | Certificate | IATF 16949:2016, ISO 45001, ISO 9001, ISO 14001 |
| Thickness (mm) | 0.15-5.00 (Required) | Technique | Cold Rolled / Hot Rolled |
| Width (mm) | 10-1250 (Provide slitting service) | Surface | Polished |
| Coil ID (mm) | 450/508/others | Edge treatment | Round edge |
| Condition | Available in Annealed or Hardened condition | Delivery Time | 2-4 weeks (Negotiate) |
| Production period | 2-4 weeks (Negotiate) | Package | Standard Package,Deluxe Package, Export Package |
| MOQ | 0.5 Ton |
Grade Equivalent Chart
Below are the chemical composition of SK85 (SK5) steel and the equivalent grade designations under various standards for your reference.
| Standard | Grade | C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Ni(%) | Cu(%) | V(%) |
|---|---|---|---|---|---|---|---|---|---|---|
| JIS | SK85 (SK5) | 0.80-0.90 | 0.10-0.35 | 0.10-0.50 | ≤0.030 | ≤0.030 | ≤0.30 | ≤0.25 | ≤0.25 | — |
| GB/T | T9 | 0.85-0.94 | ≤0.305 | ≤0.40 | ≤0.030 | ≤0.020 | ≤0.25 | ≤0.25 | ≤0.25 | — |
| ASTM |
W1 -8 C T72301 |
0.80-0.90 | 0.10-0.40 | 0.10-0.40 | ≤0.030 | ≤0.030 | ≤0.30 | ≤0.20 | ≤0.20 | ≤0.10 |
| SAE | 1085 | 0.80-0.93 | — | 0.70-1.00 | ≤0.040 | ≤0.050 | — | — | — | — |
| EN | C85S | 0.80-0.90 | 0.15-0.35 | 0.60-0.90 | ≤0.025 | ≤0.025 | ≤0.40 | ≤0.40 | ≤0.25 | — |
| DIN | CK85 (1.1269) | 0.80-0.90 | 0.15-0.35 | 0.60-0.90 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.25 | — |
Our engineering team is available to assist with your unique project needs. Feel free to contact us to discuss your application, and we will gladly provide material suggestions and arrange for samples.
Processing view of factory
The main production process for our medium and high carbon steel products are as follows. We Strict compliance with customer requirements for thickness and width tolerances. Our fully in-house production line ensures consistent material stability at all times.
SK85(SK5) Steel Surface Details
SK85(SK5) Steel Coil After Slitting
High Carbon Steel Package Details
High-carbon steel, containing over 0.6% carbon, is renowned for its exceptional hardness, strength, and wear resistance. These properties make it the ideal choice for applications demanding sharp edges, high fatigue life, and durability. Key applications include:
- Mechanical Components: Springs, clutch parts, washers, chain parts.
- Cutting Tools & Blades: Saws (band, round, and hand), cutlery, razor blades.
- Precision Instruments & Implements: Measuring tapes, gauges, knitting needles, pen points.
- Structural Components: Structural parts of cameras.
If you have requirements for your product’s performance, but are not sure about the most suitable grade, or want to know more information about a specific grade, please do not hesitate to contact us.
Factory certificates
Our factory fully certified under IATF 16949, ISO 9001, ISO 14001, and ISO 45001 standards.
Performance Test
For each exported batch of high-carbon steel, we measure thickness and width to confirm they meet your specifications. Upon request, we can also provide metallographic examination, tensile & elongation test and hardness testing.
Trust by foreign customers
With over 10 years of export experience, we have delivered thousands of tons to customers in more than 20 countries and earned widespread acclaim.
