What can Mutual Metal help you with?
Mutual Metal is an enquiry-based manufacturer of perforated metal, expanded metal, and industrial bar grating serving architectural, construction, industrial, and filtration applications. Below are the five dedicated ways our technical and export teams support your project from drawing to delivery.
3 Core Lines
Perforated, Expanded, Grating
Custom Tooling
Patterns, Margins & Sizes
Full MTC & QA
Certified Traceability
Custom Metal Solutions
Precision punching, tailored aperture tooling, cutting, and custom grating fabrication to project specifications.
Material Testing & Verification
Mill test certificates, chemical composition analysis, and mechanical testing against ASTM, ISO, EN, and GB standards.
Product Sourcing
Direct mill-level sourcing across standard expanded metal, perforated sheets, heavy bar grating, and stair treads.
Quality & Inspection
Dimensional checks, hot-dip galvanizing coating thickness measurement, surface finish audits, and pre-shipment reports.
Export & Logistics
Export-grade steel band crating, waterproof wrapping, container optimization, and door-to-port documentation.
Custom metal fabrication capabilities
Producing perforated metal, expanded metal, and bar grating precisely to your drawings, tooling requirements, and industrial standards.
Enquiry-Based Fabrication Process
Submit Specifications
Share your CAD drawings, dimensional requirements, or material specifications.
Technical Review & DFM
Our engineering team checks tooling compatibility, structural loads, and edge tolerances.
Formal Quotation
Receive a clear, direct quote detailing lead times, pack sizing, and freight options.
Precision Production
Manufactured strictly to approved shop drawings with factory inspection reports.
Need a customized panel configuration?
Send us your layout drawings, aperture specs, or bill of quantities for an engineered quote.
Verified chemistry, certified strength, exact dimensions
Every batch of industrial metal is verified from raw coil receipt through final surface treatment. We provide complete mill test certificates, dimensional logs, and third-party laboratory reports upon request.
从原料进厂光谱分析、拉伸屈服力学试验，到几何公差及 EN 10204 3.1 材质单，确保出厂批次完全符合项目工程规范。
原材料检验与光谱分析
Spectrometric chemical analysis and verification of inbound coils, bars, and sheets before cutting or perforation.
Verification checks:
- Optical emission spectrometry (OES) chemical analysis
- Positive material identification (PMI) alloy check
- Raw coil surface integrity and edge camber review
工厂质保书与批次追溯
Certified documentation per EN 10204 3.1 & 3.2 tracing heat numbers directly from primary steel and alloy mills.
Verification checks:
- Heat number and melt source verification
- Certified chemical composition (% C, Mn, Si, P, S, Cr, Ni, Mo)
- Standard-matched mechanical property certificate
力学与承载性能测试
Destructive and load testing to confirm yield, tensile strength, elongation, and structural capacity under simulated conditions.
Verification checks:
- Tensile strength & yield point testing (ASTM E8 / ISO 6892)
- Rockwell (HRC/HRB) & Brinell hardness testing
- Bar grating uniform and concentrated load deflection tests
几何尺寸与网孔公差校验
Precision gauge and digital coordinate inspection ensuring open area percentages, pitch centers, and borders match fabrication drawings.
Verification checks:
- Hole diameter, pitch, and margin clearance checks
- Expanded metal SWD/LWD diamond dimension check
- Panel squareness, diagonal variance, and flatness check
表面涂层与耐候腐蚀测试
Testing of hot-dip galvanizing, powder coating, and anodized layers for adhesion, thickness, and atmospheric resistance.
Verification checks:
- Zinc coating thickness via magnetic eddy gauge (ASTM A123)
- Cross-cut adhesion testing for powder coatings (ASTM D3359)
- Neutral salt spray chamber corrosion testing (ASTM B117)
国际标准符合性审核
Formal cross-checking against regional and global standards governing industrial grating, perforated metals, and structural screens.
Verification checks:
- ASTM A36, A1011, B209, A240 specification alignment
- ISO 9001 quality process compliance
- EN, GB, and ANSI structural and safety standard audits
Standard testing compliance directory
Review technical tolerance charts, chemical bounds, and testing procedures documented for each respective regional code.
Require batch-specific MTRs with your shipment?
Request 3.1 certificates, ultrasonic testing, or third-party inspection (SGS / BV / TUV) during quotation.
Find the exact metal specification for your build.根据项目要求精准选型，确保工业级供应稳定性
Navigating gauge standards, open area ratios, hole pitches, and span load capacities can delay procurement. Our technical team works directly with your engineers or project managers to identify the correct material, gauge, and finish before production starts.
从板厚标准、开孔率、孔间距到跨距承重计算，我们协助您快速确认图纸规格与制造参数，降低采购试错成本。
Need full supply chain transparency?
Explore our full supply chain framework including raw coil sourcing, ASTM/ISO testing protocols, inventory warehousing, and export packing standards.
深入了解原材钢厂直采、国际质量检验、批次排产与全球海运包装流程。
Exact spec identification
We calculate open area percentages, load deflection ratings, and acoustic or airflow factors to match your exact application.
协助计算开孔率、载荷挠度、声学及通风指标，精准匹配您的实际工程需求。
All primary metal formats
Unified sourcing across perforated sheet, expanded mesh, and welded or press-locked bar grating in carbon steel, aluminum, and stainless.
统一供应冲孔网、钢板网、压焊与压锁钢格板，涵盖碳钢、铝合金及不锈钢等材质。
Direct mill supply chain
Direct production scheduling with certified mills gives you consistent batch tolerances and predictable production lead times.
与认证钢厂直签排产，保障各批次公差一致性与可控的生产交付周期。
Documented compliance
Every delivery includes full mill test reports (MTR), surface coating certificates, and dimensional inspection records.
随货提供完整的钢厂材质单（MTR）、表面处理涂层报告及关键尺寸复检记录。
Choose the material category to configure按品类查看详细选型参数与规格表
Perforated Metal
冲孔板网Round, square, slotted & architectural patterns
圆孔、方孔、长条孔及装饰异形孔
Expanded Metal
钢板网 / 膨胀网Standard raised & flattened architectural mesh
标准菱形网、平整压平网及重型踏板网
Bar Grating
钢格栅板Welded, press-locked, and heavy-duty walkway panels
压焊、压锁钢格板及重载平台格栅
Quality control & inspection process
Every perforated sheet, expanded mesh panel, and welded bar grating undergoes systematic verification from raw billet inspection to export crating.
从原材料入库、冲压拉伸成型到出厂装运，每一批工业金属构件均接受严谨的标准化质量检测。
过程检验与公差控制
在冲孔、拉网、焊接各工序中执行严格的孔径、中心距、板厚与平整度抽检。
Verification Criteria / 检验标准
- Hole tolerance: ±0.05mm
- Bar weld alignment check
- Continuous coil flatness audit
ISO 9001:2015 质量管理体系
自原材料原厂质保书（MTC）核验到车间批次追溯，全流程标准化管控。
Verification Criteria / 检验标准
- Full raw material heat traceability
- Calibrated measurement tooling
- Documented non-conformance logging
ASTM 国际标准合规检验
严格遵循 ASTM 与 NAAMM 国际工业标准，确保力学荷载与材质性能达标。
Verification Criteria / 检验标准
- ASTM A36 / A1011 metal grade tests
- NAAMM MBG 531 load tolerance
- Surface treatment thickness (ASTM A123)
出货前终检与包装核验
出厂前外观复查、防锈/镀锌层厚度测定、捆扎固定及装箱防护核验。
Verification Criteria / 检验标准
- 100% quantity and tag audit
- Pallet stability & edge protector test
- Formal pre-dispatch inspection report
Need factory mill test reports or customized testing protocols?
We provide complete Mill Test Certificates (MTC EN 10204 3.1), third-party SGS/BV inspection coordination, and custom deflection load test data.
如需材质质保书（MTC 3.1）、第三方SGS/BV验货报告或特定载荷试验数据，请查阅完整质保说明。
Global logistics and export support
全球货物出口、合规单证与海外安全运输一体化保障
We package and document your order for sea or air freight, and handle customs clearance with your freight forwarder anywhere in the world.
海外重型出口包装
根据海运标准提供熏蒸木箱、钢带捆扎及防潮防护膜加固，确保长途运输完好无损。
出口报关与合规单证
提供材质证明单(MTC 3.1)、原产地证书、装箱清单及第三方商检(SGS/BV)报告，合规快速通关。
多式联运国际货运
支持整柜(FCL)、散货拼箱(LCL)、散杂滚装及空运紧急专线，对接全球各大港口航线。
货代协同与指定港口交付
严格遵循国际贸易术语(FOB/CIF/DDP等)，无缝衔接客户指定货代并提供出货跟踪节点。
Sector-Specific Delivery Handling
行业定制化物流与现场交付方案
Structural grating, trench covers, and safety platforms delivered directly to job site staging yards.
Protective surface interleaving for anodized and PVDF coated decorative perforated panels.
Machined components, heavy expanded walkways, and equipment guards palletized for assembly lines.
Cylindrical screens, sintered meshes, and precision micro-perforated tubes packed in protective sleeves.
Need specialized crating dimensions, third-party inspection, or port storage coordination?
View Inspection & Logistics guideRequest a custom quote for your metal specifications
Send your drawings, aperture schedules, or material grades directly to our engineering estimators for a comprehensive quote.
- Custom aperture sizes & tooling options
- Mill test reports (MTR) & material certification
- CAD / BIM drawing review & engineering support
- Worldwide export packaging & logistics coordination
Engineering & Technical Review
Need guidance on load capacities, open area calculations, or ASTM/EN material compliance? Our technical specialists assist at every stage.
Perforated Sheet, Welded & Riveted Bar Grating, Expanded Metal Mesh
Formal technical quotes issued within 24 business hours