18KHG ( 18ХГ )
18KHG Steel – Distributor, Supplier & Manufacturer Support | Russian Metals
INTRODUCTION OF 18KHG
Russian Metals supplies 18KHG alloy steel to OEMs, EPC contractors, machining units, and industrial traders across India and international markets. We maintain ready stock and support custom machining, heat treatment, cutting, and forging services, enabling fast delivery for pipes, tubes, bars, billets, and near-net-shape forgings. 18KHG is trusted for high-strength, fatigue-resistant, and wear-resistant components in aerospace, automotive, marine, defense, power generation, and heavy engineering.
| Grade : | 18KHG ( 18ХГ ) |
| Substitute: | 10, 20 |
| Classification : | High quality structural carbon steel |
What Is 18KHG?
18KHG is a high-strength, heat-treatable alloy steel valued for its toughness, wear resistance, and dimensional stability after hardening and tempering. Its balanced composition supports precision machining and reliable performance under cyclic loads.
Primary keyword: 18KHG
Secondary keywords: 18KHG steel supplier and manufacturer
Chemical composition in % for grade 15 ( 15 )
| C | Si | Mn | Ni | S | P | Cr | Cu |
|---|---|---|---|---|---|---|---|
| 0.12 - 0.19 | 0.17 - 0.37 | 0.9 - 1.2 | max 0.3 | max 0.04max 0.035 | max 0.035 | 0.9 - 1.2 | max 0.3 |
Why Choose 18KHG from Russian Metals?
Trusted supply partner: Proven 18KHG steel supplier and manufacturer support for global and Indian programs.
Ready stock + MTO: Pipes/tubes, round bars, billets, rings, and cut pieces.
Quality assurance: MTC, UT/PMI, third-party inspection on request.
Value-add processing: Saw-cutting, turning, peeling, grinding, drilling, and CNC for pilot lots.
Technical guidance: Grade selection, heat-treatment windows, and machining recommendations.
Temperature of critical points for grade 18KHG ( 18ХГ ).
| Ac1 = 765 , Ac3(Acm) = 840 |
Mechanical properties under Т=20oС for grade 18KHG ( 18ХГ )
| Assortment | Dimension | Direct. | σB | σT | δ5 | ψ | KCU | Heat treatment |
|---|---|---|---|---|---|---|---|---|
| - | (mm) | - | MPa | MPa | % | % | kJ/m² | - |
| Bar, GOST 4543-71 | Ø 15 | 880 | 735 | 10 | 40 | Guenching 880oC, oil, Drawing 200oC, air | ,
Typical Applications of 18KHG
Aerospace & Defense: shafts, bushings, fixtures, structural brackets.
Automotive & Mobility: transmission parts, gears, hubs, drive components.
Marine & Energy: pump parts, couplings, wear sleeves.
Heavy Engineering: tooling, jigs, high-load pins and fasteners.
Final selection depends on drawings/specs, heat treatment, and compliance; our team helps match 18KHG to your requirement.
| Brinell hardness for 18KHG ( 18ХГ ) (annealing) , GOST 4543-71 | HB 10 -1 = 187 MPa |
Technological properties for grade 15 ( 15 )
| Flakes : | predisposed |
| Temper brittleness: | predisposed |
Forms, Sizes & Supply Conditions
Pipes & Tubes (Hot-rolled / Seamless / Welded)
OD as required, thickness range to spec
Supply: as-rolled, normalized, quenched & tempered (per PO)
Bars & Billets
Dia range: small to large diameters
Tolerances: h9–h11 available on request
Rings, Forgings & Cut Pieces
Near-net shapes for reduced machining time
CNC roughing/finishing for prototypes & pilot lots
Equivalent steels for grade 08KH18N10T ( 08Х18Н10Т )
Warning! Indicated both exact and nearest equivalents.
| USA | Germany | Japan | France | England | European | Italy | Belgium | Spain | China | Sweden | Bulgaria | Hungary | Poland | Romania | Czechia | Finland | Australia | SSouth Korea |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| - | DIN,WNr | JIS | AFNOR | BS | EN | UNI | NBN | UNE | GB | SS | BDS | MSZ | PN | STAS | CSN | ONORM | SNV | KS |
| 5115 5120 G51150 G51200 H51200 | 1.7131 1.7147 16MnCr5 16MnCrS5 20MnCr5 20MnCrS5 | SMnC420 SMnC420H | 16MC4 16MC5 16MnCr5RR 20MC5 | 16MnCr5 20MnCr5 527M17 527M20 590H17 590M17 | 1.7131 1.7147 16MnCr5 16MnCr5KD 20MnCr5 20MnCrB5 | 16MnCr5 20MnCr5 | 16MnCr5 | 16MnCr5 20MnCr5 F.1516 | 15CrMn 20CrMn | 2127 2173 | 16ChG 18ChG | BC3 BC3Z | 15HG 16HG 18HGT 20HG | 17MnCr10 18MnCr10q 18MnCr11 20MnCr12 | 14220 14221 14222 14223 | 20MnCr5 | 5120 5120H | SMnC420H |
Processing & Services
Cut-to-length and precision CNC machining
Heat treatment (normalize, Q&T as per requirement)
Surface finishing: peeling, grinding, shot-blasting, protective oils
Testing: UT, PMI, hardness, and dimensional inspection
Export packing: moisture protection, crate/pallet as needed
Advantages of 18KHG for Engineers
High hardenability → consistent core properties in thicker sections
Toughness & fatigue strength → stable under dynamic loads
Wear resistance → suitable for sliding/contact components
Machinability (pre-HT & post-HT) → reliable tolerances for CNC workflows
Types of delivery of grade 18KHG ( 18ХГ )
- В22 - Graded and shaped rolling
- B23 - Sheets and Strips
- 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