30KHRA ( 30ХГСН2А ) ( 30ХГСНА )
30KHRA – High-Strength Alloy Steel Stockist & Exporter in India
INTRODUCTION OF 30KHRA
At Russian Metals, we supply 30KHRA (primary keyword) in ready-to-ship bars, plates, pipes/tubes, and forgings for demanding mechanical applications. Trusted by automotive, heavy machinery, energy, and fabrication industries, our 30KHRA alloy steel (secondary keyword) combines high tensile strength, wear resistance, and reliable toughness—ideal for gears, shafts, axles, and stressed components.
| Grade : | 30KHRА ( 30ХРА ) |
| Classification : | Alloy structurall steel |
| Equivalent grades: | Is absent |
Why Choose 30KHRA from Russian Metals?
Certified material: Mill Test Certificates (EN 10204 3.1) available on request
Repeatable quality: Tight dimensional tolerances, ultrasonic tested options
Fast dispatch: Pan-India supply with global shipping support
Processing services: Cutting, peeling/turning, heat-treating, rough machining
Key Features of 30KHRA
High strength & hardness for loaded parts and wear zones
Good toughness to resist impact/shock conditions
Stable performance after heat treatment (quench & temper)
Moderate corrosion resistance due to chromium addition (coating recommended for aggressive media)
Mechanical properties under Т=20oС for grade 30KHRА ( 30ХРА )
| Assortment | Dimension | Direct. | σB | σT | δ5 | ψ | KCU | Heat treatment |
|---|---|---|---|---|---|---|---|---|
| - | (mm) | - | MPa | MPa | % | % | kJ/m² | - |
| , GOST 4543-71 | 1600 | 1300 | 9 | 40 | 500 | Guenching 900oC, oil, Drawing 200oC, air, |
Typical Chemical Composition (Wt. %)
(Indicative ranges for buyer guidance; actual heat certs prevail.)
C: 0.27–0.33
Si: 0.17–0.37
Mn: 0.50–0.80
Cr: 1.00–1.30
Ni: ≤ 0.30
P: ≤ 0.025–0.035
S: ≤ 0.025–0.035
Fe: Balance
| Brinell hardness for 30KHRА ( 30ХРА ) (annealing) , GOST 4543-71 | HB 10 -1 = 229 MPa |
Heat Treatment Recommendations
Normalizing: ~850–900°C, air cool – refines grain and improves machinability
Quenching: ~880–930°C, oil/water – elevates strength/hardness
Tempering: ~200–300°C – stress relief and toughness balance
Annealing: ~650–700°C – softening prior to machining/forming
Types of delivery of grade 30KHGSА ( 30ХГСА )
- B03 - Metal forming treatment. Forgings
- В05 - Welding and cutting of metals., Soldering, riveting
- В22 - Graded and shaped rolling
- B23 - Sheets and Strips
- В32 - Graded and shaped rolling
- B33 - Sheets and Strips
- В62 - Steel pipes and connecting parts to them
- В71 - Low-carbon steel wire
Applications of 30KHRA
Automotive & Off-Highway: gears, axles, shafts, crank components
General Machinery: bolts, pins, heavy-duty spares, power-train parts
Oil & Gas/Mining: wear parts, drill/handling components (with proper protection)
Agricultural Implements: plow components, harrows, drive elements
Construction/Industrial Fabrication: stressed fittings and structural pieces
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]
Heat Treatment & Weldability
Normalizing: 850 – 900 °C with air cooling
Quenching: 860 – 900 °C with oil cooling
Tempering: 500 – 650 °C to achieve optimal toughness
Weldability: Limited; preheating (200-350 °C) and post-weld heat treatment recommended
Proper heat treatment enhances its hardness, durability, and impact resistance for demanding industrial applications.
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]
Forms, Sizes & Supply Range
Bars & Rods: hot-rolled, peeled/turned, ground—round/square/hex
Plates & Sheets: mill or QT condition; cut-to-size available
Pipes & Tubes: seamless/welded (on inquiry), NDE as required
Forgings: step shafts, rings, blocks per drawing
Finishes: black, bright, machined; NDT & PMI on request
Machinability, Weldability & Surface Protection
Machinability: good in normalized/annealed; use rigid setups and quality tooling in hardened states
Weldability: feasible with procedure control; preheat/interpass & PWHT recommended for thick sections
Corrosion protection: primer, plating, or coatings advised for aggressive exposure
Quality & Documentation
Mill Test Certificates (3.1), heat numbers traceable
Third-party inspection (as required)
Packaging: export-grade, moisture-protected; custom crate/sea-worthy packing
Get a Quote for 30KHRA
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Russian Metals ships across India and worldwide with dependable lead times.