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30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
Specifications
Brand Name :
BAOSTEEL BENSTEEL HBIS XINGCHENG
Model Number :
30CrMnSiA
Certification :
ISO 9001
Place of Origin :
China
MOQ :
10 kgs
Price :
540 - 890 USD/Ton
Payment Terms :
L/C, T/T, Western Union
Supply Ability :
20Ton per week
Delivery Time :
5 - 12 days based on the quantity
Packaging Details :
standard packing for export
Products :
30CrMnSiA
Thickness :
10.0 - 200.0mm
Width :
1000-2200mm
Length :
2000-12000mm
Standard :
ASTM EN GB
Other Material :
Carbon Steel, Alloy Steel, Stainless Steel
Brand :
BAOSTEEL XINYU XINGCHENG HBIS
Service :
Cutting
Description

  1. 30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components

Products Specification

Product Name 30CrMnSiA Alloy Steel Plate
Thickness 10mm~200mm
Width 1000~3000mm,common width is 1250mm,1500mm,2000mm,2200mm
Length 1000~12000mm,can as your request cut
Surface Clean,finished, blasting and painting or as your request
Delivery Hot Rolled, Controlled Rolling,Normalizing,Annealing, Tempering,Quanching, Q+T
Packing Steel Strapping,fixing in the Container,can customize
Thickness tolerance ±0.3mm
Application It is mainly used to make structural parts such as car girder, beam, transmission shaft and car chassis parts, which can reduce the weight of the parts.

30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components

Engineered Strength for Demanding Mechanical Systems

30CrMnSiA quenched and tempered (Q&T) alloy steel plate is a premium-grade, medium-carbon structural steel specifically heat-treated to deliver an exceptional balance of high strength, impact toughness, and fatigue resistance. Designed for mission-critical mechanical components in aerospace, defense, heavy machinery, oil & gas, and automotive sectors, this material excels where reliability under dynamic loads, shock, or wear is non-negotiable.
Our 30CrMnSiA Q&T plates are manufactured to GB/T 11251-2009 and GJB 2150A-2005 standards, then subjected to a precise quenching and tempering cycle to achieve uniform mechanical properties across thicknesses from 10 mm to 200 mm. Each plate is fully traceable, ultrasonically inspectable, and available with custom dimensions, surface finishes, and certified documentation—ensuring seamless integration into high-performance engineering workflows.

Why Choose Quenched & Tempered 30CrMnSiA?

Unlike as-rolled or normalized steel, Q&T 30CrMnSiA offers:
  • Tensile strength up to 1275 MPa – ideal for weight-sensitive, high-load applications
  • Superior fatigue life – critical for rotating or cyclically stressed parts
  • Enhanced wear resistance – due to hardened microstructure and Cr/Mn alloying
  • Controlled hardness (24–32 HRC) – balances machinability and durability
  • Excellent low-temperature toughness – impact energy ≥88 J at –40°C (premium grade)
This makes it a top choice for gears, shafts, axles, landing gear, hydraulic rods, and other components that demand long service life under extreme conditions.

Chemical Composition (GB/T 11251 Standard)

Element Content (%) Metallurgical Role
Carbon (C) 0.28 – 0.34 Enables martensite formation during quenching
Silicon (Si) 0.90 – 1.20 Strengthens ferrite; improves oxidation resistance
Manganese (Mn) 0.80 – 1.10 Enhances hardenability and hot ductility
Chromium (Cr) 0.80 – 1.10 Increases hardenability, wear resistance, and temper stability
Sulfur (S) ≤ 0.025 Minimized to avoid hot shortness
Phosphorus (P) ≤ 0.025 Controlled to prevent cold brittleness
Residuals (Ni, Cu, etc.) ≤ 0.30 total Kept low for weldability and purity
The “A” suffix denotes higher purity than standard 30CrMnSi—essential for safety-critical parts.

Mechanical Properties After Quenching & Tempering

Property Typical Value Test Standard
Tensile Strength (Rm) 1080 – 1275 MPa GB/T 228.1
Yield Strength (Rp0.2) ≥ 835 MPa GB/T 228.1
Elongation (A5) ≥ 10% GB/T 228.1
Reduction of Area (Z) ≥ 45% GB/T 228.1
Impact Energy (20°C) ≥ 39 J GB/T 229
Impact Energy (–40°C) ≥ 88 J (premium grade) GB/T 229
Hardness 24 – 32 HRC ISO 6508 / GB/T 230.1
Note: Properties are optimized for plates ≤100 mm thick. For sections >150 mm, slight reductions in through-thickness hardness may occur but remain within specification.

Recommended Heat Treatment Cycle

To achieve the above properties, the following industrial-standard Q&T process is applied:
  1. Austenitizing: 860–880°C (soak time based on thickness)
  2. Quenching: Oil quench (preferred for reduced distortion vs. water)
  3. Tempering: 500–600°C (adjust based on target hardness/strength)
  4. Cooling: Air cool to room temperature
⚠️ Avoid tempering between 250–400°C to prevent temper brittleness.

Available Dimensions & Tolerances

Parameter Range
Thickness 10 mm – 200 mm
Width 1000 – 3000 mm (custom up to 3500 mm)
Length 2000 – 12,000 mm
Thickness Tolerance ±0.5 mm (10–50 mm); ±1.0 mm (50–100 mm); ±2.0 mm (>100 mm) per GB/T 709
Flatness ≤ 4 mm/m (standard); ≤ 2 mm/m (with leveling)
Surface Finish Black scale (standard); shot-blasted, pickled, or oiled (optional)

Typical High-Performance Applications

Industry Components
Aerospace Landing gear struts, wing fittings, engine mounts
Defense Armored vehicle frames, weapon system brackets, turret supports
Automotive & Motorsport Crankshafts, connecting rods, transmission gears
Heavy Machinery Excavator pins, hydraulic cylinders, gear blanks
Oil & Gas Drill collars, downhole tools, high-pressure valve bodies
Rail & Transportation Axles, couplers, suspension arms
30CrMnSiA Q&T often serves as a cost-effective alternative to more expensive alloys like 4340 or 300M when ultra-high fracture toughness isn’t required.

Value-Added Services

We support your production chain with end-to-end solutions:
  • Precision Cutting: Waterjet (up to 200 mm), plasma, or laser per CAD files
  • Machining Prep: Edge beveling, hole drilling, chamfering
  • Ultrasonic Testing (UT): Full-volume inspection per ASTM A578 Grade B/C
  • Certification: EN 10204 3.1 Mill Test Reports, chemical & mechanical data
  • Packaging: Export-ready bundling with anti-rust protection and heat-number marking

Quality & Compliance

  • ✅ ISO 9001:2015 certified manufacturing
  • ✅ Melt traceability from electric arc furnace (EAF) + LF + VD refining
  • ✅ Optional third-party inspection (SGS, BV, TÜV)
  • ✅ Documentation compliant with ASME, PED, and military procurement requirements

Global Supply with Technical Support

With decades of experience supplying Q&T alloy steels worldwide, we offer:
  • Competitive pricing with mill-direct access
  • Lead times of 10–25 days depending on size and quantity
  • FOB or DDP shipping from major Chinese ports (Shanghai, Tianjin, Qingdao)
  • Engineering support for material selection, welding procedures, and heat treatment validation

30CrMnSiA quenched and tempered plate, Q&T alloy steel plate 10-200mm, high-strength mechanical steel, GB/T 11251 Q&T steel, 30CrMnSiA for gears and shafts, wear-resistant Q&T plate, China 30CrMnSiA supplier, aerospace-grade alloy steel plate, impact-toughened structural steel, custom-cut Q&T steel for heavy machinery.

30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components

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30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components

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Product Detail
Brand Name :
BAOSTEEL BENSTEEL HBIS XINGCHENG
Model Number :
30CrMnSiA
Certification :
ISO 9001
Place of Origin :
China
MOQ :
10 kgs
Price :
540 - 890 USD/Ton
Contact Supplier
video
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components
30CrMnSiA Quenched and Tempered Alloy Steel Plate for High-Performance Mechanical Components

JIANGSU MITTEL STEEL INDUSTRIAL LIMITED

Verified Supplier
4 Years
jiangsu, wuxi
Business Type :
Manufacturer, Distributor/Wholesaler, Exporter
Main Products :
stainless steel roofing sheet, Stainless Steel Strip, Others stainless steel sheet
Total Annual :
>1000000
Employee Number :
>100
Certification Level :
Verified Supplier
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