Carbon Tool Steel Strip

It has outstanding hardness and wear resistance after quenching, ideal for making
sharp cutting edges. Its cost is economical with good stamping workability, 
while its hardenability is limited, so it is more suitable for thin strips and small-size tools.

Main Grades: T8A, T10A, SK4, SK5, SK85, SK95
Carbon content: 0.65%–1.35%
Thickness: 0.08–4.5 mm
Width: 7–650 mm
Applications: Cutting tools, blades and other related products

Q1: What is the difference between SK5 and T10A, and which grade is better suited for small stamping tools?
A1: SK5 is a Japanese JIS G4401 carbon tool steel (roughly equivalent to Chinese-standard T8A) with carbon content 0.80-0.90%. T10A is a Chinese GB/T1298 premium carbon tool steel with carbon content 0.95-1.04% and tighter sulfur/phosphorus control for higher purity. Higher carbon means greater hardness and wear resistance after quenching, but significantly reduced toughness - more brittle and prone to chipping. SK5 is typically used for small punches, thin-sheet stamping dies, blades, spring plates and light-impact cold stamping, offering balanced toughness and high fault tolerance for repeated stamping cycles. T10A is better suited to static wear-resistant tools such as files and low-speed cutting tools with no vibration or impact - for high-volume small-part stamping with repetitive impact, SK5 is the more reliable choice; T10A is prone to edge chipping under intermittent impact due to higher internal quenching stress.

Q2: What is the maximum thickness available for stamping-grade tool steel strip?
A2: SK4/SK5 cold-rolled strip is commonly supplied at 0.05-3.0mm for mainstream small-part stamping, with 0.05-0.3mm available for ultra-thin electronic stamping (spring contacts, connectors, micro shims); standard stock thickness for SK5/T10A tool steel strip is 0.08-4.5mm.

Q3: Which companies are among your key customers?
A3: Bosch, Toyota, Honda, Kern-Liebers, GreatStar, TIELIU, C&U Group, DELI, EXEDY DYNAX, Zhejiang Liming, Hubei Sanhuan.

Q4: What edge conditions are available?
A4: Mill edge, slit edge, square edge with rounded corners, full rounded edge, or per customer requirements.

Q5: What surface finishes are available?
A5: Bright cold-rolled (shiny silver), blue/grey-blue tempered, white polished, natural (heat-treated), polished blue, polished yellow, or as per customer request.

Q6: What is your minimum order quantity (MOQ)?
A6: MOQ is determined based on the specific grade and dimensional requirements, and varies by width.