9KHS ( 9ХС )
9XC Steel — High-Carbon Tool Steel Supplier | Russian Metals
INTRODUCTION OF 9XC
9XC steel is a high-carbon tool steel known for its exceptional hardness, wear resistance, edge retention, and durability, making it ideal for cutting tools, industrial blades, dies, forming tools, files, punches, shear knives, and precision mechanical components. With proper heat treatment, 9XC delivers outstanding performance in high-stress and abrasive environments. At Russian Metals, we manufacture, stock, and supply 9XC steel in a wide range of round bars, flat bars, sheets/plates, strips, wires, and near-net-shape blanks, ensuring suitability for machining, forging, and final grinding operations.All materials are provided with mill test certificates, heat-number traceability, and export-grade packing for reliable domestic and international shipments.
| Grade : | 9KHS ( 9ХС ) |
| Substitute: | ХВГ, ХВСГ |
| Classification : | Alloy tool steel |
Temperature of critical points for grade 9KHS ( 9ХС ).
| C | Si | Mn | Ni | S | P | Cr | Mo | W | V | Ti | Cu |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.85 - 0.95 | 1.2 - 1.6 | 0.3 - 0.6 | max 0.4 | max 0.03 | max 0.03 | 0.95 - 1.25 | max 0.2 | max 0.2 | max 0.15 | max 0.03 | max 0.03 |
What is 9XC Tool Steel?
9XC (GOST 9ХС) is a low-alloy, chromium–silicon cold-work tool steel designed for high hardness, edge stability, and wear resistance. Typical uses include threading tools, cutters, reamers, taps, dies, gauges, and other precision tools operating at low to moderate cutting speeds.
Key Properties & Benefits
High working hardness and wear resistance after hardening/tempering
Good dimensional stability for accurate tooling
Fine, even carbide distribution for consistent cutting performance
Supplied annealed ≤241 HB for machinability; heat-treat to service hardness
Temperature of critical points for grade 9KHS ( 9ХС ).
| Ac1 = 770 , Ac3(Acm) = 870 , Ar1 = 730 , Mn = 160 |
Forms We Supply (9XC)
Rounds & Flats: hot-rolled/forged, peeled/turned, ground
Cut-to-length with tight tolerances
Optional stress-relief, ultrasonic testing (UT), and PMI on request
Common Sizes
Rounds: 10–200 mm dia (wider on request)
Flats: thickness 6–80 mm; width per drawing
Mechanical properties under Т=20oС for grade 9KHS ( 9ХС )
| Assortment | Dimension | Direct. | σB | σT | δ5 | ψ | KCU | Heat treatment |
|---|---|---|---|---|---|---|---|---|
| - | (mm) | - | MPa | MPa | % | % | kJ/m² | - |
| 790 | 445 | 26 | 54 | 390 | As-delivered state |
Heat Treatment Guidance (Shop Reference)
- Anneal: ~740–760 °C; slow cool for ≤241 HB
- Hardening (typical): 800–830 °C austenitize; oil/air quench
- Tempering: 150–250 °C (choose per hardness vs. toughness target)
- Machining: best in annealed state with rigid setups & coolant only
Applications
Thread tools: taps, dies, chasers, thread rolling tools
Cutting & measuring tools: reamers, cutters, punches, gauges
Cold-work stamping of thin sections and precision features
| Brinell hardness for 9KHS ( 9ХС ) (annealing) , GOST 5950-2000 | HB 10 -1 = 241 MPa |
Grade Cross-References (Guide)
DIN/W.-Nr.: 1.2108 (90CrSi5), 150Cr14 (nearest)
GOST: 9ХС (9KHS)
Always verify against your standard/drawing before substitution.
Quality & Documentation
EN 10204 3.1 MTC (chemistry & mechanicals)
Dimensional & hardness reports; 3rd-party inspection (BV/DNV/LR/TÜV)
Export seaworthy packing with rust prevention
Technological properties for grade 9KHS ( 9ХС )
| Weldability : | is not used. |
| Flakes : | not predisposed |
| Temper brittleness: | predisposed |
Ordering Checklist (Fast Quote)
Grade & standard: 9XC (GOST 5950) / 30KHGSA if needed
Size & tolerance, length, condition (annealed / hardened & tempered)
Target hardness, tests (UT/PMI/hardness/micro), finish & packing
Delivery location & Incoterms
Physical properties for grade 9KHS ( 9ХС )
| T | E 10- 5 | α 10⁶ | λ | ρ | C | R 10⁹ |
|---|---|---|---|---|---|---|
| Grade | MPa | 1/Grade | Watt/(m·Grade) | kg/m3 | J/(kg·Grade) | Ohm·m |
| 20 | 1.9 | 7830 | 400 |
Equivalent steels for grade 9KHS ( 9ХС )
Warning! Indicated both exact and nearest equivalents.
| Germany |
|---|
| DIN,WNr |
| 150Cr14 90CrSi 90CrSi5 |
Types of delivery of grade 9KHS ( 9ХС )
- В32 - Graded and shaped rolling
Specification
Mechanical properties :
σB - Tensile strength [MPa]
σT - Yield stress [MPa]
δ5 - Specific elongation at fracture [%]
ψ - Reduction of area [%]
KCU - Impact strength [kJ/m²]
HB - Brinell hardness [MPa]
Physical properties :
T - Test temperature [Grade]
E - Young modulus [MPa]
α - Coefficient of linear expansion (20° - T) [1/Grade]
λ - Thermal (heat) condition coefficient [Watt/(m·Grade)]
ρ - Density [kg/m³]
C - Specific heat (range 20° - T) [J/(kg·Grade)]
R - Electrical resistance [Ohm·m]
Weldability :
without limitations - welding is done without heating and subsequent heat treeting
limited weldability - welding is possible under heating up to 100-120 grade and subsequent heat treeting
hard weldability - obtaining the quality welding needs the additional operations:heating up to 200-300 grade; the heat treeting ia annealing