Linsy A357 is a premium aluminum-silicon-magnesium casting alloy known for its outstanding combination of high strength, excellent weldability, and superior pressure tightness. Its fine microstructure and low iron content minimize porosity and deliver high integrity in thin-walled, highly stressed castings. Commonly supplied in the T6 temper, A357 is a preferred choice for aerospace and high-performance automotive components where fatigue resistance matters.
可选格式： ingot / die casting / sand casting / permanent-mold casting / CNC-machined cast parts
常见脾气： T6 / T5
处理支持： CNC machining / polishing / anodizing / heat treatment
质量文件： 每笔订单均附有MTC报告
Linsy A357 is a premium aluminum-silicon-magnesium casting alloy known for its outstanding combination of high strength, excellent weldability, and superior pressure tightness. Its fine microstructure and low iron content minimize porosity and deliver high integrity in thin-walled, highly stressed castings. Commonly supplied in the T6 temper, A357 is a preferred choice for aerospace and high-performance automotive components where fatigue resistance matters.
Linsy supplies A357 in the forms most useful for foundries and component buyers. Standard and custom dimensions are available; contact our team for non-listed sizes.
| 形式 | Typical Size / Specification | Common Use |
|---|---|---|
| 铸锭 | Standard ingot weights; remelt stock | Foundry remelting |
| Die casting | Per drawing; wall 1.5–8 mm | Complex thin-wall parts |
| Sand casting | Up to ~600 mm envelope | Aerospace / pump housings |
| Permanent-mold casting | Per drawing | Structural components |
| CNC-machined casting | Tolerances per ISO 2768 | Finished parts |
The tables below list the alloy’s common commercial and standard designations. Cross-references follow widely used naming systems; verify the exact designation required for your target market.
| 体系 | 名称 |
|---|---|
| Former / trade style | A357 |
| AA（铝业协会） | A357 |
| EN | EN AC- series (market dependent) |
| 美国材料与试验协会 | ASTM B26 / B85 (castings), B179 (ingot) |
Composition limits below follow common casting-alloy standards. Values are weight percent, balance aluminum. Confirm exact limits against your required specification.
| 要素 | Content (wt.%) |
|---|---|
| Si | 6.5–7.5 |
| 铁 | 0.15 最大值 |
| 铜 | 最大 0.10 |
| 锰 | 最大 0.10 |
| 镁 | 0.45–0.70 |
| Ti | 0.10–0.20 |
| 是 | 0.04–0.07 (grain refiner) |
| Sr | 0.02–0.04 (modifier, optional) |
| 锌 | 0.05 最大值 |
| 其他，各 | 最大0.03 |
| 其他，合计 | 最大 0.10 |
| Al | 剩余 |
The values below are typical room-temperature properties for the indicated condition and should be confirmed against mill test data for your specific casting and heat treatment. Casting method, section thickness, and cooling rate affect results.
| 脾气 | 拉伸强度（兆帕） | 屈服强度（兆帕） | 伸长率 (%) |
|---|---|---|---|
| T6 | 310–330 | 245–265 | 3.5–5.0 |
| T5 | 240–290 | 180–220 | 3.0–5.0 |
Choose the temper based on your priority between strength, ductility, and dimensional stability:
| 脾气 | 何时使用 |
|---|---|
| T6 | Solution heat treated and artificially aged. Highest strength and fatigue resistance; use for highly stressed structural castings. |
| T5 | Artificially aged only (no solution treatment). Improved strength with lower cost and distortion than T6. |
A357-T6 delivers among the highest strengths available in a cast Al-Si-Mg alloy, suitable for structural aerospace and automotive parts.
Low iron and fine microstructure reduce porosity, making A357 ideal for impellers, pump bodies, and housings under pressure.
Good weldability combined with high fatigue strength supports fabricated and dynamically loaded assemblies.
A357 is typically solution heat treated and aged to T6. Welding is feasible with care; post-weld heat treatment may be required to restore properties. Machining follows standard aluminum practice. Anodizing and polishing are supported for appearance and corrosion protection.
Every A357 shipment is delivered with an MTC (material test certificate) covering chemical composition and mechanical properties as ordered. Dimensional inspection and third-party verification (e.g. SGS report, available on request) can be arranged. Our production system is managed under ISO 9001, ISO 14001, and ISO 45001.
Linsy operates a Shenzhen-based aluminum manufacturing facility with over 20 years of experience across the 1000–8000 series and a broad range of casting grades. We support both ingot supply and finished cast components with in-house CNC machining, polishing, and anodizing.
For A357 we emphasize melt cleanliness and low-iron practice to protect fatigue life in aerospace-grade castings.
A357 has a tighter silicon range and tighter impurity control than A356, giving more consistent strength and better weldability. Choose A357 when fatigue and pressure tightness are critical.
Specify T6 for maximum strength and fatigue resistance. Use T5 where moderate strength with lower distortion is acceptable.
For standard ingot and common sand/permanent-mold castings, typical lead time is 10–60 days depending on temper, quantity, and any required machining or surface finishing. Confirm exact timing with our sales team when requesting a quote.
Yes. Every shipment is supplied with an MTC (material test certificate / inspection report) covering chemical composition and mechanical properties as ordered.
We support custom dimensions, casting method selection, heat treatment (F, T4, T5, T6 as applicable), and downstream CNC machining, polishing, and anodizing. Share your drawing or spec and we will quote against it.
Our casting alloys are produced and inspected against widely recognized standards such as ASTM B26/B85 and EN 1706. Specific designation cross-references are listed on each product page; confirm the exact standard requirement for your market when ordering.
Use the RFQ form or contact our sales team with alloy, temper, form, dimensions, quantity, and required certificates. Our engineers will respond with availability and pricing.
林西优势
林西铝业是铝加工产品的领先供应商，服务于航空航天、通用工程、汽车、船舶和其他专业工业应用等多个行业。
我们致力于保持最高标准的质量和环境责任，我们的认证证明了这一点：ISO 9001:2008、ISO 14001:2004 和 SGS 认证。
