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T15 High Speed Tool Steel | T12015 | SKH10 | 1.3203
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At SteelPro Group, we are a trusted supplier with years of experience in delivering high-quality T15 high-speed tool steel. With a proven track record of successful collaborations across industries, we offer tailored solutions to meet your specific requirements
What Is T15 Tool Steel?
T15 is a high-speed tool steel with excellent hardness, wear resistance, and high-temperature strength, featuring high vanadium and cobalt content. It’s ideal for demanding cutting and machining applications, including drills, milling cutters, taps, gear-cutting tools, and cold work dies. Compared to M2, T15 performs better at high temperatures but is harder to machine and grind. Proper heat treatment is essential to prevent cracking.
Standards And Equivalent Grades of T15 Tool Steel
| Standard | Equivalent Grades |
| GB 9943 | W12Cr4V5Co5 |
| JIS G 4403 | SK H10 |
| ASTM A600 | T15 |
| UNS | T12015 |
| ISO 4957 | HS12-1-5-5 |
| DIN 17350 | 1.3202 |
T15 Tool Steel Products Forms And Supply Range
We offer various T15 tool steel products, including steel plates, round bars, flat bars, square bars, and rods, in multiple sizes to meet your specific requirements.
| Product Form | Size Range |
| Round Bars | Diameter: 5 mm to 250 mm (3/16″ to 10″) |
| Flat Bars | Thickness: 6.35 mm to 76 mm (1/4″ to 3″)Width: 25.4 mm to 304.8 mm (1″ to 12″) |
| Square Bars | Thickness/Width: 6.35 mm to 102 mm (1/4″ to 4″) |
| Tool Blanks | Thickness/Width: 6.35 mm to 102 mm (1/4″ to 4″)Length: 101.6 mm to 304.8 mm (4″ to 12″) |
| Plates | Thickness: 6.35 mm to 76 mm (1/4″ to 3″)Width: 152.4 mm to 304.8 mm (6″ to 12″)Length: 304.8 mm to 1828.8 mm (12″ to 72″) |
| Rods | Diameter: 3.2 mm to 76.2 mm (1/8″ to 3″) |
T15 Tool Steel Chemical Composition
| Element | Composition (%) |
| Carbon (C) | ≤ 0.15 |
| Manganese (Mn) | 0.30 – 0.60 |
| Silicon (Si) | 0.10 – 0.40 |
| Chromium (Cr) | 3.50 – 4.50 |
| Molybdenum (Mo) | 0.20 – 0.30 |
| Nickel (Ni) | 0.30 – 0.50 |
| Vanadium (V) | 0.10 – 0.20 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
T15 Tool Steel Physical Properties
| Property | Metric Value | Imperial Value |
| Density | 8.19 g/cc | 0.296 lb/in³ |
| Melting Point | 3050 °C | 5522 °F |
| CTE, Linear | 9.90 µm/m-°C (Temper 20 – 260°C) | 5.50 µin/in-°F (Temper 68.0 – 500 °F) |
| CTE, Linear | 12.5 µm/m-°C (Temper 20.0 – 540 °C) | 7.00 µin/in-°F (Temper 68.0 – 797 °F) |
| Shrinkage | -0.200 % | -0.200 % |
T15 Tool Steel Mechanical Properties
| Property | Metric Value | Imperial Value | Note |
| Hardness(HRC) | 46.5 | 46.5 | Tempered at 1275°F |
| 67.5 | 67.5 | Tempered at 1025°F | |
| Modulus of Elasticity | 200 – 207 GPa | 29000 – 30000 ksi | – |
| Izod Impact Unnotched | 27.1 – 46.1 J | 20.0 – 34.0 ft-lb | – |
| Abrasion | 8 | 8 | loss in mm3, Tempered at 1025°F; ASTM G65 |
| 32.3 | 32.3 | loss in mm3, Tempered at 1275°F; ASTM G65 |
T15 Tool Steel Heat Treatment
Annealing
Purpose: Softens the steel, making it easier to machine or shape. After annealing, T15 tool steel typically has a hardness of about 277 HB.
Process: Heat the steel slowly to 1575-1600°F (857-871°C), hold for 1 hour per inch of thickness (minimum 2 hours), then cool slowly in the furnace to 1000°F (538°C), and finish cooling to room temperature.
Hardening
- Preheating:
Preheat the steel to 1500-1550°F (816-845°C) and equalize. A second preheat at 1850-1900°F (1010-1040°C) is recommended for vacuum hardening.
- Austenitizing:
Heat the steel rapidly to 2150-2260°F (1177-1238°C) in a furnace or 2150-2250°F (1177-1221°C) in a salt bath. The choice of temperature affects the final properties—lower temperatures enhance toughness, while higher temperatures improve hardness and wear resistance.
- Quenching:
Quench in pressurized gas or warm oil. For gas quenching, maintain a minimum pressure of 4 bars and a cooling rate of 400°F per minute (222°C). For oil, quench until the steel is black (around 900°F or 482°C) and finish cooling in air.
Tempering
Process: Immediately after quenching, temper the steel at 1000-1100°F (538-593°C) for 2 hours. Air cool to room temperature. For best results, perform triple tempering to ensure uniform hardness and toughness.
T15 Tool Steel Applications
At SteelPro Group, we bring extensive experience in supplying T15 high-speed tool steel. Whether it’s for cutting tools, forming tools, or precision machining, we can offer tailored solutions
Cutting Tools
- End Mills
- Milling Cutters
- Taps
- Reamers
- Broaches
- Thread Rolling Dies
Forming Tools
- Cold Heading Punches
- Header Die Inserts
- Shaper Tools
- Planer Tools
- Boring Tools
Precision Machining Tools
- Lathe Tools
- Shaving Tools
- Forming Dies
Enhance Tool Performance with Our T15 Tool Steel
If you’re facing challenges with tool wear, high temperatures, or the need for more precise machining, SteelPro Group is here to provide solutions.
In addition to offering high-quality T15 tool steel, we also offer T1 tool steel, which provides even greater toughness and wear resistance.
Our comprehensive services include custom machining, heat treatment, and precision cutting to meet your specific size and shape requirements.
