40KH13 ( 40Х13 ) ( 4Х13 )
40Х13X Stainless Steel Supplier in India — Russian Metals
Russian Metals stocks and exports 40Х13X in bars/rods, plates/sheets, pipes/tubes and near-net forgings. As a 40Х13X stainless steel supplier, we deliver traceable heats, tight tolerances, and export-grade packing for tooling, mechanical parts, knives/industrial blades, pump/valve components, and general engineering.
INTRODUCTION OF 40KH13 ( 40Х13 )
Russian Metals stocks and exports 40Х13X stainless steel in bars/rods, plates/sheets, seamless & welded pipes/tubes, and near-net-shape forgings ready for machining or heat treatment. As a dedicated 40Х13X stainless steel supplier, we provide controlled chemistry, tight dimensional tolerances, MTR-backed traceability, ultrasonic-tested lots (on request), and export-grade seaworthy packing. 40Х13X is widely used for tooling, high-wear mechanical parts, knives and industrial blades, pump and valve components, surgical instruments, shafts, and general engineering applications requiring hardness, corrosion resistance, and a reliable martensitic stainless structure.
| Grade : | 40KH13 ( 40Х13 ) ( 4Х13 ) |
| Substitute: | 30Х13 |
| Classification : | Corrosion-resistant high-temperature steel |
Typical Chemical Composition (Wt. %) — Buyer Guidance
(Indicative; actual heat certificate prevails.)
| Element | Min (%) | Max (%) |
|---|---|---|
| C | 0.36 | 0.45 |
| Cr | 12.0 | 14.0 |
| Si | – | 0.80 |
| Mn | – | 0.80 |
| Ni | – | 0.60 |
| P | – | 0.030 |
| S | – | 0.025 |
| Fe | Balance | Balance |
Why Buy 40Х13X from Russian Metals?
Certified quality: EN 10204 3.1 MTC, heat/lot traceability
Processing: cut-to-size, peeling/turning, grinding, polishing, beveling
Testing: PMI, UT/ET, hardness, microstructure on request
Logistics: sea-worthy packing, barcoding, fast India & global dispatch
What is 40Х13X? (Quick Overview)
40Х13X is a martensitic stainless grade in the 13%-Cr family designed to harden by quench & temper, offering high hardness, wear resistance, and fair corrosion resistance in mildly aggressive media. Typical uses include cutting tools, shear blades, surgical/dental instruments (non-implant), pump shafts, valve parts, and high-wear fixtures.
Temperature of critical points for grade 40KH13 ( 40Х13 ).
| Ac1 = 800 , Ar1 = 780 |
Mechanical properties under Т=20oС for grade 40KH13 ( 40Х13 )
| Assortment | Dimension | Direct. | σB | σT | δ5 | ψ | KCU | Heat treatment |
|---|---|---|---|---|---|---|---|---|
| - | (mm) | - | MPa | MPa | % | % | kJ/m² | - |
| Sheet, GOST 5582-75 | 550 | 15 | Annealing 740 - 800oC, | |||||
| Bar, GOST 18907-73 | 590-810 | 10 | ||||||
| Wire, GOST 18143-72 | 640-880 | 10-14 |
Mechanical & Physical Snapshot (Condition-Dependent)
Mechanical ranges (room temp.)
Tensile strength: ~590–810 MPa (bars) • Elongation: ~10–14%
Brinell hardness: ~143–229 HB (annealed) → up to ~460–550 HB after Q&T
Service notes
Excellent edge retention post hardening; moderate corrosion resistance — consider passivation or coatings in chloride or acidic environments.
Heat Treatment Recommendations
Annealing/Softening:
~740–800 °C, controlled cool — best machinability
Hardening (Quench):
Austenitize ~980–1050 °C; air/oil quench
Tempering:
Choose temperature for desired hardness/toughness balance; double tempering recommended
| Brinell hardness for 40KH13 ( 40Х13 ) (quenching, tempering) , | HB 10 -1 = 460 - 550 MPa |
| Brinell hardness for 40KH13 ( 40Х13 ) (annealing) , Bar GOST 5949-75 | HB 10 -1 = 143 - 229 MPa |
Product Forms & Supply Range
Bars & Rods: hot-rolled, peeled/turned, bright-ground (round/square/hex)
Plates/Sheets/Strips: mill, ground, or polished finishes (2B/BA/No.4)
Pipes & Tubes: seamless/welded; bevels, end caps, hydrotest on request
Forgings: step shafts, rings, blocks; near-net to drawing
Technological properties for grade 40KH13 ( 40Х13
| Weldability : | is not used. |
Applications
Cutting & Tooling:
Industrial knives, shear blades, food-processing cutters
Pumps & Valves:
Seats, stems, sleeves, shafts
General Engineering:
Fixtures, wear strips, gauges, springs (as applicable)
Physical properties for grade 40KH13 ( 40Х13 )
| 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 | 2.18 | 25 | 7650 | 461 | 590 | |
| 100 | 2.14 | 10.8 | 26 | 7630 | 482 | 650 |
| 200 | 2.06 | 11.9 | 27.2 | 7600 | 523 | 710 |
| 300 | 1.98 | 12.3 | 28.3 | 7570 | 565 | 790 |
| 400 | 1.88 | 13 | 29.1 | 7540 | 607 | 860 |
| 500 | 1.76 | 13.6 | 29.1 | 7510 | 674 | 940 |
| 600 | 1.63 | 13.5 | 29.1 | 7480 | 775 | 1000 |
| 700 | 1.48 | 13.8 | 28.3 | 7450 | 988 | 1120 |
| 800 | 1.4 | 14.6 | 27.9 | 7420 | 825 | 1180 |
| 900 | 28.5 | 691 | 1160 | |||
| T | E 10- 5 | α 10⁶ | λ | ρ | C | R 10⁹ |
Machinability, Weldability & Finishing
Machinability: good in annealed state; use rigid setups, carbide tooling, coolant
Weldability: limited — apply qualified procedures with preheat/interpass control and post-weld tempering to reduce cracking and restore toughness
Finishing: grinding, polishing, passivation; specify Ra and edge-prep for blades
Equivalent steels for grade 40KH13 ( 40Х13 )
Equivalent steels for grade 08KH18N10T ( 08Х18Н10Т )
Warning! Indicated both exact and nearest equivalents.
| Germany | Japan | China | Bulgaria | Hungary | Romania | Germany | Japan | China | Bulgaria | Hungary | Romania |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DIN, WNr | JIS | GB | BDS | MSZ | STAS | DIN, WNr | JIS | GB | BDS | MSZ | STAS |
| 1.4031 1.4034 X38Cr13 X39Cr13 X40Cr13 X42Cr13 X46CM3 X46Cr13 | SUS420J2 | X40Cr14 Z33C13 Z38C13M Z40C13 Z40C14 Z44C14 Z50C14 | 420S45 X39Cr13 | 1.4031 1.4034 X39Cr13 X40Cr13 X41Cr13 | X40Cr14 X41Cr13KU X46Cr13 | F.3404 F.3405 X40Cr13 X45Cr13 | 4C13 | 2304 2314 | 4H13 | 17024 19435 |
Equivalent & Cross-Reference (Guide Only)
Nearest/common trade equivalents used for sourcing (verify by spec/condition):
X40Cr13 / X39Cr13 (EN 1.4034 / 1.4031) • AISI 420 (selected sub-grades) • SUS420J2 (JIS) • 4Cr13 / 40Cr13 (GB)
QA, Documents & Packing
Docs: MTC 3.1, dimensional reports; 3rd-party inspection (BV/DNV/LR/TÜV) on request
Packing: anti-rust wraps, edge protection, export crates, heat/lot labels
Types of delivery of grade 40KH13 ( 40Х13 )
- 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
- B73 - Steel Alloy Wire
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