Product Introduction: 16MnCr5 (1.7131) Alloy Steel
16MnCr5 (1.7131) is a premium case-hardening alloy steel renowned for its exceptional combination of surface hardness and core toughness. Engineered for demanding mechanical applications, this manganese-chromium steel delivers superior wear resistance after carburization while maintaining excellent impact strength in the core.
Key Features & Benefits
Case-Hardening Excellence: Responds exceptionally well to carburizing and quenching, achieving a high surface hardness of up to 58–62 HRC for superior wear and fatigue resistance.
High Core Strength: Maintains strong ductility and toughness in the core, ensuring components can withstand heavy shock loads and dynamic stresses without failure.
Consistent Hardenability: Offers uniform hardening depth across complex geometries, minimizing distortion and ensuring dimensional accuracy for precision-engineered parts.
Versatile Machinability: Performs reliably in machining operations such as turning, milling, and grinding, particularly in its softened or normalized condition.
Heat Treatment Stability: Exhibits predictable behavior during case hardening, annealing, and tempering, allowing for precise control over final mechanical properties.
Typical Applications
Automotive transmission gears and synchronizer hubs
Camshafts and crankshafts
Pinions, shafts, and steering components
High-strength fasteners and mechanical drive systems
Bearing components and precision-machined parts
Chemical Composition (Approximate)
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.14–0.19 |
| Silicon (Si) | ≤ 0.40 |
| Manganese (Mn) | 1.00–1.30 |
| Chromium (Cr) | 0.80–1.10 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.035 |
Typical Mechanical Properties (After Case Hardening)
| Property | Value |
|---|---|
| Tensile Strength | 600–1,200 MPa (depending on heat treatment) |
| Yield Strength | ≥ 390 MPa |
| Surface Hardness | 58–62 HRC (after carburizing) |
| Core Hardness | 300–450 HB |
| Elongation | 9–15% |
Standards & Equivalents
DIN/EN: 16MnCr5 (1.7131)
SAE/AISI: 5115
UNS: G51150
JIS: SCM415
Processing & Heat Treatment
16MnCr5 is typically supplied in a soft-annealed condition for optimal machinability. Standard heat treatment processes include:
Case Hardening (Carburizing): 880–980°C, followed by oil quenching
Tempering: 150–200°C to reduce brittleness while retaining surface hardness
Annealing: 650–700°C for stress relief and softening
Why Choose 16MnCr5 (1.7131)?
For manufacturers requiring reliable, wear-resistant components that endure high-impact conditions, 16MnCr5 delivers an optimal balance of performance, machinability, and cost-effectiveness. Its proven track record in automotive and heavy machinery applications makes it the material of choice for precision gears and transmission components where failure is not an option
Inconel alloys are oxidation corrion resistance materials well suited for service in extreme environments subjects to pressure and heat.When heated,Inconel forms a rhick,stable,passivating oxide layer protecting the surface from further attack.Inconel retains strength over a wide temperature range,attrative for high temperature applications where aluminum and steel would succumb to creap as a result of thermally induced crystal vacancies.Inconel’s high temperature strength is developed by solid solution strengthening or precipitation hardening,depending on the alloy
Inconel 718 is a nickel-chromium-molybdenum alloy designed to resist a wide range of severely corrosive environments, pitting and crevice corrosion. This nickel steel alloy also displays exceptionally high yield, tensile, and creep-rupture properties at high temperatures. This nickel alloy is used from cryogenic temperatures up to long term service at 1200° F. One of the distinguishing features of Inconel 718’s composition is the addition of niobium to permit age hardening which allows annealing and welding without spontaneous hardening during heating and cooling. The addition of niobium acts with the molybdenum to stiffen the alloy’s matrix and provide high strength without a strengthening heat treatment. Other popular nickel-chromium alloys are age hardened through the addition of aluminum and titanium. This nickel steel alloy is readily fabricated and may be welded in either the annealed or precipitation (age) hardened condition. This superalloy is used in a variety of industries such as aerospace, chemical processing, marine engineering, pollution-control equipment, and nuclear reactors
High temperature components, such as turbine blades, guide vanes, turbine disks, high pressure compressor disks,machine manufacturing and combustion chambers used in the manufacture of aviation, naval and industrial gas turbines
| Designation：Inconel 718 | |
| Products Category：Inconel Series | |
| Products description： | |
| Equivalent designations | |
| UNS N07718 | |
| DIN W. Nr. 2.4668 | |
Form | ASTM |
Rod, bar and forging | B 637 |
Plate, sheet and strip | B 670, B 906 |
Seamless pipe and tube | B 983 |
Chemical composition
% | Ni | Fe | Cr | Mo | C | Mn | Si | P | S | Co | Nb+Ta | Ti | Al | Cu | B |
min | 50.0 | balance | 17.0 | 2.80 | 4.75 | 0.65 | 0.20 | ||||||||
max | 55.0 | 21.0 | 3.30 | 0.08 | 0.35 | 0.35 | 0.015 | 0.015 | 1.00 | 5.50 | 1.15 | 0.80 | 0.30 | 0.006 |
Physical properties
Density | 8.23 g/cm3 |
Melting range | 1260-1335℃ |
Item | Inconel 600 | Inconel 601 | Inconel 617 | Inconel 625 | Inconel 690 | Inconel 718 | Inconel X750 | Inconel 825 |
C | ≤0.15 | ≤0.1 | 0.05-0.15 | ≤0.08 | ≤0.05 | ≤0.08 | ≤0.08 | ≤0.05 |
Mn | ≤1 | ≤1.5 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.35 | ≤1 | ≤1 |
Fe | 6-10 | rest | ≤3 | rest | 7-11 | rest | 5-9 | ≥22 |
P | ≤0.015 | ≤0.02 | ≤0.015 | — | — | — | — | — |
S | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.01 | ≤0.01 | ≤0.03 |
Si | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.5 |
Cu | ≤0.5 | ≤1 | — | ≤0.3 | ≤0.5 | ≤0.3 | ≤0.5 | 1.5-3 |
Ni | ≥7.2 | 58-63 | ≥44.5 | 50-55 | ≥58 | 50-55 | ≥70 | 38-46 |
Co | — | — | 10-15 | ≤10 | — | ≤1 | ≤1 | — |
Al | — | 1-1.7 | 0.8-1.5 | ≤0.8 | — | 0.2-0.8 | 0.4-1 | ≤0.2 |
Ti | — | — | ≤0.6 | ≤1.15 | — | — | 2.25-2.75 | 0.6-1.2 |
Cr | 14-17 | 21-25 | 20-24 | 17-21 | 27-31 | 17-21 | 14-17 | 19.5-23.5 |
Nb+Ta | — | — | — | 4.75-5.5 | — | 4.75-5.5 | 0.7-1.2 | — |
Mo | — | — | 8-10 | 2.8-3.3 | — | 2.8-3.3 | — | 2.5-3.5 |
B | — | — | ≤0.006 | — | — | — | — | — |
Alloy | ASTM | DIN | BS | AFNOR | GB | |
|---|---|---|---|---|---|---|
New grades | Old grades | |||||
| Inconel 600 | UNS N06600 | 2.4816 / NiCrl 5Fe | NA14 | NC15FE | NS3102 | NS312 |
| Inconel 601 | UNS N06601 | 2.4851 / NiCr23Fe | NC23FeA | NS3103 | NS313 | |
| Inconel 625 | UNS N06625 | 2.4856 / NiCr22Mo9Nb | NA21 | NC 22 DNb | NS3306 | NS336 |
| Inconel 718 | UNS N07718 | 2.4668 / NiCr19Fe19Nb5Mo3 | NA 51 | NC19FeNb | GH4169 | GH4169 |
| Inconel X-750 | UNS N07750 | 2.4669 / NiCr15Fe7TiAl | NC15TNbA | GH4145 | GH4145 | |
| Inconel 725 | UNS N07725 | |||||