ASTM B103 C51000 Phosphor Bronze Plate
"Brass plate" typically refers to a brass nameplate or a brass plaque, often used for identification purposes, such as being affixed to doors, walls, or coffins to indicate a name, title, or other information. Brass, a metal alloy primarily composed of copper and zinc, is chosen for its durability, resistance to corrosion, and aesthetic appeal. The term "brass plate" can also refer to a thicker sheet of brass material, though its primary usage is in the context of nameplates or plaques.
Product Parameters
Basic informationInternational standard: ASTM B103 (phosphor bronze plate standard)
Chinese brand: QSn5-0.1 (GB/T 5231)
Alloy type: tin phosphor bronze
Key components:
Copper (Cu): balance (≥94.8%)
Tin (Sn): 4.2-5.8% (core strengthening element)
Phosphorus (P): 0.03-0.35% (deoxidizer)
Zinc (Zn): ≤0.30% (impurity control)
Physical properties
CharacteristicsTypical valueTest standard
Density8.86 g/cm³ASTM B193
Liquidus1000°CDSC test
Resistivity13.5 μΩ·cm20℃ test
Thermal conductivity75 W/(m·K)ASTM E1225
Modulus of elasticity110 GPaASTM E111
Mechanical property gradient
StateTensile strength (MPa)Yield strength (MPa)Elongation (%)Hardness (HV)
Annealed (O)290-350120-150≥5080-100
1/4 hard (H01)380-450250-300≥25120-140
Full hard (H04)550-620500-550≥5180-220
Product specification systemPrecision tolerance (ASTM B248):
0.1-0.5mm: ±0.01mm
0.5-2.0mm: ±0.02mm
2.0-6.0mm: ±0.05mm
Special form:
Superelastic strip (δ≥60%)
Mirror polished plate (Ra≤0.05μm)
Surface treatment options
Treatment typesProcess parametersImproved performance
Electroplating nickelThickness 5-8μmCorrosion resistance increased 10 times
Chemical passivationChromate treatmentContact resistance stabilized
Laser rougheningPower 50WFriction coefficient reduced by 40%
Typical industrial applicationsElectronic and electrical:
Connector shrapnel (USB Type-C interface)
Relay contacts (life ≥ 10⁵ times)
RF shielding cover (5G equipment)
Mechanical parts:
Precision gears (module ≤ 0.5)
Bearing cage (high-speed working conditions)
Instrument hairspring (daily error ≤ 2s)
Special fields:
Aviation plug (MIL-DTL-38999)
Medical catheter assembly
High-precision spring (load deviation ≤ 1%)


Product Display

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Product Application

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Product Packaging

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Factory Display
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FAQ

Q:Can I get samples before order ?

A:Yes, of course. Usually our samples are free,we can produce by your samples or technical drawings.

Q:Can I go to your factory to visit?

A:Of course, we welcome customers from all over the world to visit our factory.

Q:How can I get a quotation from you ?

A:You can leave us message, and we will reply every message in time. Or we may talk on line.

Q:What product information do I need to provide?

A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.

Q:Does the product have quality inspection before loading?

A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we accept the third party inspection absolutely.

Q:What are the advantages of your company?

A:(1)More Than 30 year's Experience

(2)The company is a modern steel enterprise group integrating precision manufacturing, spot warehousing, international logistics, and product deep processing.

(3)World-class production equipment, product quality that meets international certifications, and timely and thoughtful after-sales service

(4)Never stop product research and development and innovation to create high-quality products that meet the global standards.

(5)Integrity business philosophy, the highest quality products, the most reasonable prices, and a global marketing network.

Q:How do we trust your company?

A:We specialise in steel business for years as golden supplier on Alibaba, headquarter locates in liaocheng, Shandong province, you are welcome to investigate in any ways, by all means, you could place an order in Alibaba with trade assurance which could secure your payment.

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