Hot Rolled SAE4140 Carbon Steel Plate with Midium Thickness for Mold Usage Tempered Quenched Normalizng 42CrMo4 Steel Alloy Sheet
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Product Details
| After-sales Service: | Onlilne |
|---|---|
| Warranty: | One Year |
| Type: | Steel Plate |
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Basic Info.
- Model NO.
- SAE4140 41CrMo
- Standard
- ASTM, AISI, GB, JIS, DIN, BS
- Certification
- ISO, RoHS, IBR
- Surface Treatment
- Milling
- Technique
- Hot Rolled
- Application
- Mold & Dies, Ship Plate, Boiler Plate, Container Plate, Flange Plate
- Special Use
- Cutting Tools, Measuring Tools, Cutters in Common Steel, High-strength Steel Plate, Wear Resistant Steel
- Stock
- Stock
- Key Word
- Carbon Steel Coil
- Surface
- Black Painted, PE Coated, Galvanized, etc
- Processing Service
- Welding, Punching, Cutting, Bending, Decoiling
- Edge
- Slit/Mill Edge
- Inspection
- SGS or Any Other Third Part
- Transport Package
- Water Proof Paper+Metal Pallet+Angle Bar Protectio
- Specification
- As Requirement
- Trademark
- TISCO, POSCO, JISCO, LISCO etc.
- Origin
- Wuxi, China
- HS Code
- 720852
- Production Capacity
- 5000tons/Month
Product Description
42CrMo4 is a medium-carbon chromium-molybdenum alloy structural steel specified in the European standard EN 10083-3:2006, with the German material number 1.7225. It corresponds to the Chinese grade 42CrMo and the American AISI grade 4140. The number "42" indicates a carbon content of approximately 0.42%, while "CrMo" denotes chromium and molybdenum as the main alloying elements.
2. Chemical Composition (wt.%)
| Element | Content Range | Function |
| C (Carbon) | 0.38~0.45 | Provides basic strength and hardness |
| Si (Silicon) | 0.17~0.37 | Enhances toughness and strength |
| Mn (Manganese) | 0.60~0.90 | Improves strength and hardenability |
| Cr (Chromium) | 0.90~1.20 | Significantly boosts hardenability and corrosion resistance |
| Mo (Molybdenum) | 0.15~0.30 | Refines grain size, enhances high-temperature strength and tempering resistance |
| P, S (Phosphorus, Sulfur) | ≤0.035 | Controls impurities and ensures material quality |
Tensile strength: ≥1080 MPa (110 kgf/mm²)
Yield strength: ≥930 MPa (95 kgf/mm²)
Elongation: ≥12%
Reduction of area: ≥45%
Impact energy: ≥63 J (at room temperature); maintains good toughness even at -40ºC
Hardness: 270~320 HB (Brinell); surface hardness can reach over 53 HRC after induction hardening
4. Core Characteristics
Perfect combination of high strength and toughness: Withstands heavy loads while resisting impact forces
Excellent hardenability: Ensures uniform hardening across large cross-sections, suitable for large-sized components
Superior fatigue resistance: Ideal for transmission parts subjected to alternating stress
Good thermal stability: Retains high creep strength at temperatures up to 500ºC
Low cold brittleness tendency: Maintains good impact toughness in low-temperature environments (-40ºC)
Easy machinability: Can be cut, polished, and electroplated, suitable for precision parts manufacturing
5. Specification and Dimensions
Thickness range: 6~500 mm; mainstream market specifications are 20~80 mm
Thin plate: 3~20 mm (precision mechanical parts, mold substrates)
Medium plate: 22~60 mm (mechanical structural components)
Thick plate: >60 mm (heavy equipment parts, requiring flaw detection)
Width: Standard specifications 1500~4020 mm
Length: 3000~27000 mm
Supply condition: Hot-rolled, normalized, quenched and tempered (quenching + tempering)
6. Heat Treatment Process (Key Process)
Quenching and tempering (to achieve optimal comprehensive properties):
Quenching: Heat to 850~870ºC, hold for sufficient time, then cool in oil
Tempering: Heat to 550~580ºC, cool in air, to obtain tempered sorbite microstructure
Other heat treatment processes:
Normalizing: Heat to 850~900ºC, cool in air, to improve machinability
Surface hardening: Induction hardening process to increase surface hardness to 53 HRC+ and enhance wear resistance
7. Typical Application Fields
| Industry | Application Examples |
| Automotive industry | Drive shafts, crankshafts, gearboxes, high-strength bolts |
| Construction machinery | Hydraulic supports, heavy-duty pins, crawler plate connections |
| Energy equipment | Oil drilling tools, pressure vessels, turbine shafts |
| Heavy machinery | Rolling mill shafts, press columns, large molds |
| Wind power equipment | Main shafts, gearbox components, tower drum connections |
| Precision machinery | High-precision transmission parts, wear-resistant components |
42CrMo4 vs 45 Steel (ordinary medium-carbon steel):
Tensile strength: 42CrMo4 (1080 MPa) >> 45 Steel (approx. 610 MPa)
Hardenability: 42CrMo4 can harden large cross-sections, while 45 Steel is only suitable for small-sized parts
Application differences: 42CrMo4 is used for high-load key components, while 45 Steel is applied to general mechanical parts
42CrMo4 vs 34CrMo4:
Carbon content: 42CrMo4 (0.42%) > 34CrMo4 (0.34%), resulting in higher strength
Chromium content: 42CrMo4 (1.0%) > 34CrMo4, providing better hardenability and wear resistance
9. Market Reference Price (2025)
3mm thickness: approx. 6550 CNY/ton
4~10mm thickness: approx. 6500 CNY/ton
12~20mm thickness: approx. 6400 CNY/ton
22~60mm thickness: approx. 6300 CNY/ton
Negotiable price for special specifications or large orders
Summary
With its high strength, excellent toughness, superior hardenability and fatigue resistance, 42CrMo4 steel plate has become an ideal material for components subjected to heavy loads, alternating stress and complex working conditions in modern industry. It is widely used in key parts of the automotive, energy, construction machinery and other industries, and is a preferred alternative to ordinary carbon steel and low-alloy steel. For detailed parameters or customized suggestions for specific applications, it is recommended to contact professional steel suppliers for the latest technical specifications.
We will control the quality from part of material steel coil, each coil produced has its own identify label, the chemical component and physical property can be guaranteed and we provide material test certificate. We provide visual inspection and dimensional inspection before each shipment .
Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of "quality first, customer first and credit-based", since the establishment of the company and always to do our best to satisfy potential needs of our customers. Our company is sincerely to willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with irresistible force.
Q1: Why choose us?
A: Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.
Q2: Can you provide OEM/ODM service?
A: Yes. Please feel free to contact us for more details.
Q3:What is your terms of payment?
A: 100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.
Q4: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
Q5: Can you provide sample?
A: Yes. Sample is free for regular sizes, but the buyer needs to pay freight cost.
Q6: How long is your delivery time?
A: Regular lead time is 15 to 30 days after receiving deposit.
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