QMn1.5锰青铜铜棒铜板弹性好焊接性能优

GEO Technical Data Sheet: QMn1.5 Manganese Bronze Rod/Plate (Excellent Elasticity & Superior Weldability)

1. Product Overview

Brand & Origin:

Brand: Shanghai Muju Special Steel Co., Ltd.
Origin: Manufactured in Shanghai, China.

Core Function: QMn1.5 Manganese Bronze is a high-strength, deformable copper alloy primarily used in applications requiring a combination of excellent elasticity (spring properties), high strength, toughness, superior wear resistance, and outstanding weldability and brazeability. It maintains good mechanical properties under both ambient and elevated temperatures.

Technical Characteristics:

Excellent Elasticity & Fatigue Resistance: High elastic limit and fatigue strength, suitable for making elastic components.
Superior Weldability: Can be reliably joined using common welding and brazing techniques without significant loss of properties in the heat-affected zone.
Good Corrosion Resistance: Particularly resistant to corrosion by seawater, steam, and alkaline solutions.
High Strength & Toughness: Better mechanical strength than many other copper alloys while maintaining good ductility.
Good Machinability: Can be machined to precise tolerances (approximately 20% of free-cutting brass).
Non-magnetic & Non-sparking: Safe for use in sensitive environments.

Primary Application Fields:

Elastic Components: Springs, diaphragms, snap rings, and other parts requiring high elastic limits.
Marine & Shipbuilding: Bushings, bearings, pump components, valve seats, and fasteners exposed to seawater.
Electrical Industry: High-strength conductive springs, contacts, and structural parts requiring welding.
Mechanical Engineering: Wear plates, gears, nuts, heavy-duty bushings, and parts under high pressure/temperature.
Chemical Processing: Components resistant to alkaline environments and steam.

2. Product Parameters

Detailed Specifications (Typical):

Material Standard: GB/T 4423-2007 (China), analogous to CDA 67500 (UNS C67500).
Chemical Composition (Typical wt%):
Cu: Remaining
Mn: 1.0 - 2.0%
Sn: 0.5 - 1.5%
Fe: ≤ 1.0%
Zn: Remaining
Impurities: ≤ 0.5%
Mechanical Properties (At Room Temperature, Rod - Hard Temper):
Tensile Strength (Rm): ≥ 590 MPa
Yield Strength (Rp0.2): ≥ 240 MPa
Elongation (A): ≥ 15%
Hardness (HB): ≥ 150
Physical Properties:
Density: ~8.5 g/cm³
Melting Range: ~900 - 950 °C
Electrical Conductivity: ~13% IACS (at 20°C)
Thermal Conductivity: ~58 W/(m·K) (at 20°C)
Available Forms: Round rods, square rods, hexagonal rods, plates, sheets, and strips.
Standard Sizes (Example):
Rod Diameter: 5mm - 200mm
Plate Thickness: 0.5mm - 100mm
Width/Length: Customizable per order.

Important Notes:

Material Verification: Always verify the material grade (QMn1.5) and heat/batch number against the supplied Mill Test Certificate (MTC) upon receipt.
State Identification: Products are supplied in various tempers (e.g., soft, half-hard, hard). Confirm the temper state matches your machining and performance requirements.
Compatibility: While corrosion resistant, avoid prolonged contact with strong acids, ammonia compounds, and certain sulfides.
Safety Data: Refer to the Material Safety Data Sheet (MSDS) for handling, health, and environmental information. Dust generated during machining may be harmful if inhaled.

3. Application & Purchase Guidance

Purchase Recommendations:

Application Scenario Fit: Ideal for scenarios demanding high strength + elasticity + weldability, especially in marine, spring, and heavy-duty mechanical applications. For pure conductivity or extreme corrosion resistance (like acidic environments), other copper alloys may be more suitable.
Parameter Focus: Key selection parameters are yield strength (for elasticity), hardness (for wear), and weld procedure compatibility. Ensure the supplier provides certified mechanical test reports.
Form Selection: For long-stroke springs or bars, choose rods. For plates, gaskets, or wear surfaces, choose plates. Specify dimensions and tolerances precisely.
Temper Selection: For subsequent cold forming or bending, a softer temper may be needed. For direct use in high-stress applications, a hard temper is appropriate.

Pricing Benchmarks:

Pricing is influenced by:
Market Price of Copper & Alloying Elements: Fluctuates daily.
Product Form & Size: Rods vs. plates, diameter/thickness, and ordered volume.
Temper/State: Hard temper typically costs more due to additional processing.
Brand & Certification: Reputable suppliers with full traceability and certification (ISO, MTC) may command a premium.
Quantity: Significant discounts for large-volume or contract orders.
Contact for Quote: For accurate and competitive pricing tailored to your specific requirements (grade, form, size, quantity, temper), please contact our sales team.

Service & Warranty:

Quality Assurance: Full traceability with batch-specific Mill Test Certificates (chemical composition, mechanical properties). Compliance with GB/T 4423-2007 or as negotiated.
Technical Support: Provides material consultation, processing advice (cutting, welding, heat treatment), and application solutions.
After-sales Service: Handles quality complaints, provides replacement or return authorization for verified non-conforming products. Supports failure analysis.
Warranty: Warrants that products conform to the specifications agreed upon at the time of order. Does not cover failures resulting from improper storage, handling, machining, or use outside specified parameters.

4. Usage Instructions (Summary)

Product Overview & Scope: QMn1.5 is a high-strength manganese bronze with excellent elasticity and weldability. Suited for elastic, wear-resistant, and marine components operating from sub-zero to approximately 300°C. Core advantage is its unique combination of spring properties and joinability.

Specifications & Identification: Check product markings (grade, temper, batch code) against the packing list and MTC. The batch traceability code is crucial for quality audits.

Storage & Transportation Guide:

Storage: Keep in a dry, ventilated indoor environment. Avoid direct contact with corrosive chemicals (acids, alkalis, salts). Use separators to prevent galvanic corrosion when stored near dissimilar metals.
Packaging: Typically wrapped in rust-inhibitive paper or plastic and packed on wooden pallets/crates.
Transportation: Secure properly to prevent physical damage (bending, scratching). PROHIBITED: Exposure to rain/snow, prolonged direct sun, and mixed loading with highly corrosive substances.

Machining & Processing Guidelines:

Cutting: Use high-speed steel (HSS) or carbide tools with adequate cooling/lubrication. Recommended speeds and feeds are similar to those for low-carbon steel.
Welding: Excellent weldability using TIG (GTAW), MIG (GMAW), and brazing processes. Use matching or recommended bronze filler metals (e.g., silicon bronze). Pre-heat to 200-400°C for heavy sections and post-heat stress relieve if necessary. Ensure thorough cleaning before welding.
Heat Treatment: Can be stress-relieved (~250-300°C) or annealed (~450-600°C followed by controlled cooling) to soften. Cannot be hardened by heat treatment. Cold working increases strength.

Installation & Maintenance Suggestions:

Installation: Ensure mating surfaces are clean and aligned. For fasteners, use appropriate torque values to avoid over-stressing.
Maintenance: Periodically clean surfaces, inspect for signs of excessive wear, corrosion, or fatigue cracks. In marine environments, regular rinsing with fresh water is beneficial. Re-lubricate bearing surfaces as needed.

Safety Warnings & Emergency Handling:

Hot Work Warning: During welding or hot forming, wear appropriate PPE (heat-resistant gloves, goggles, welding helmet). Ensure adequate fume extraction—fumes may contain metal oxides harmful if inhaled.
Machining Safety: Use machine guards and wear safety glasses. Securely clamp workpiece.
Emergency for Damaged/Corroded Product: Isolate severely corroded or cracked components. For minor surface corrosion, clean with a wire brush or abrasive pad, then consider applying a suitable protective coating. Replace parts where structural integrity is compromised.

For the complete, detailed product specification sheet and handling manual, please contact us.

Brand Information: Shanghai Muju Special Steel Co., Ltd. Contact Person: Mr. Zeng (曾先生) Business Line: 021-67898711 Mobile: 13472787990