# ChinaCNU Steel — full reference

> ChinaCNU is the export brand of Shandong Ruitong New Materials Co., Ltd. Factory: Boxing County, Binzhou, Shandong, China. Export office: Qingdao, Shandong, China.
> This file inlines the specification data that is otherwise distributed as PDFs, so it can be read without opening them. It is reference information, not a certification or a binding quotation. A written, grade-specific quotation and the mill test certificate govern any order.
> Source documents revised 20 September 2026. Short navigation version: https://chinacnu.com/llms.txt

## Identity

- Export brand: ChinaCNU Steel
- Legal entity: Shandong Ruitong New Materials Co., Ltd.
- Unified Social Credit Code: 91371625MA3U4WYY3E — verifiable at China's National Enterprise Credit Information Publicity System (gsxt.gov.cn), a state registry independent of this company. Registering authority code 371625 is Boxing County, Binzhou, Shandong, which is where the factory is.
- Certificate-holder names appear as Shandong Ruitong New Materials Co., Ltd, not ChinaCNU.
- Registered address on the certificate: No. 6, Fuwang Plate, Xingfu Town, Boxing County, Binzhou City, Shandong Province, China
- Factory: Boxing County, Binzhou, Shandong
- Export office: Qingdao, Shandong
- Email: chinacnu01@gmail.com
- WhatsApp / phone: +86 191 5431 6688
- Contact page: https://chinacnu.com/contact-us/

## Commercial terms

- MOQ: from 25 metric tons.
- Production: typically 15–20 days after deposit and specification/colour approval. Ocean transit is additional.
- Quotation basis: FOB Tianjin. Destination freight is quoted separately on request.
- Confirm grade-specific availability, tolerances, payment, freight and final schedule in the written quotation.

## PPGI — prepainted galvanized steel coil

Page: https://chinacnu.com/ppgi-coil/ · PDF: https://chinacnu.com/wp-content/uploads/spec-sheets/ChinaCNU-PPGI-Steel-Coil-Spec-Sheet.pdf

- Base metal: hot-dip galvanized steel
- Thickness: 0.12–1.50 mm; confirm grade, tolerance and finish with order
- Width: 600–1250 mm standard; custom widths by quotation
- Coil weight / ID: 3–10 metric tons; 508 / 610 mm inner diameter
- Zinc coating: Z60 / Z80 / Z100 / Z120 / Z180 / Z275 g/m²; other options by quotation
- Paint systems: PE / SMP / HDP / PVDF; confirm the complete primer, top and back system
- Typical paint build: PE top 15–25 µm; primer 5–7 µm; back 5–7 µm. PVDF and other systems by specification.
- Colours / finish: RAL or approved sample; smooth, matt, embossed, high-gloss or wrinkle
- Standard references: ASTM A755; JIS G3312 (CGCC / CGCD); EN 10169; GB/T 12754. Specify substrate grade separately.
- Inspection points to agree: base-metal and total thickness; coating mass; paint thickness; gloss; colour difference; T-bend; adhesion; required corrosion testing
- Typical applications: roofing and wall cladding; sandwich panels; garage doors; appliance housings; interior panels
- Colour chart: https://chinacnu.com/ppgi-color-chart/ — request a physical sample for final colour approval.

## GI — hot-dip galvanized steel coil

Page: https://chinacnu.com/gi-coil/ · PDF: https://chinacnu.com/wp-content/uploads/spec-sheets/ChinaCNU-GI-Galvanized-Steel-Coil-Spec-Sheet.pdf

- Process / base steel: continuous hot-dip galvanizing; cold-rolled low-carbon / structural grades
- Thickness: 0.12–3.00 mm; confirm grade-specific range and tolerance
- Width: 600–1500 mm; custom slit widths by quotation
- Coil weight / ID: 3–15 metric tons; 508 / 610 mm inner diameter
- Zinc coating: Z30–Z275 g/m²; confirm coating designation and test method
- Surface: regular, minimized or zero spangle; skin-pass by agreement
- Treatment: chrome-free passivation available; dry or oiled as specified
- Standard references: EN 10346 (DX51D / DX52D / structural grades); JIS G3302 (SGCC / SGCH); ASTM A653; AS 1397; GB/T 2518
- Mechanical properties: grade-dependent. Confirm yield, tensile strength and elongation against the selected standard and the mill test certificate.
- Inspection points to agree: thickness and width tolerance, zinc mass, surface finish, coil weight, bend test, packing. Coating test reference ASTM A90 / JIS H0401 as applicable.
- Typical applications: roofing and cladding; light-gauge framing; HVAC ductwork; agricultural buildings; cable trays; formed profiles

## Galvalume / Aluzinc — 55% Al-Zn alloy coated steel coil

Page: https://chinacnu.com/galvalume-steel-coil/ · PDF: https://chinacnu.com/wp-content/uploads/spec-sheets/ChinaCNU-Galvalume-Aluzinc-Steel-Coil-Spec-Sheet.pdf

- Coating composition: nominal 55% aluminium / 43.4% zinc / 1.6% silicon
- Thickness: 0.12–2.00 mm; confirm selected grade and order tolerance
- Width: 600–1500 mm; confirm selected product and slit width
- Coil weight / ID: 3–10 metric tons; 508 / 610 mm inner diameter
- Coating options: AZ30 / AZ50 / AZ70 / AZ100 / AZ150 / AZ185 g/m², subject to order confirmation
- Surface / treatment: regular or minimized spangle; skin-pass, oiling and anti-fingerprint treatment by specification
- Standard references: ASTM A792; JIS G3321 (SGLCC / SGLCH); EN 10346; AS 1397; GB/T 14978
- Service conditions: corrosion performance depends on coating mass, exposure, installation and maintenance. No universal service-life or corrosion multiplier is guaranteed.
- Inspection points to agree: thickness, width, coating mass, surface treatment, mechanical properties, coil weight, seaworthy packing
- Typical applications: roofing and cladding; agricultural structures; solar support applications where the specification permits; substrate for PPGL

## Aluminium products

- [Aluminium coil](https://chinacnu.com/aluminum-coil/): alloy, temper and size-specific quotations on the product page.
- [Colour-coated aluminium coil](https://chinacnu.com/color-coated-aluminum-coil/): aluminium substrate — distinct from PPGI, which is galvanized steel.

## Grade cross-reference

- Chart (ASTM / JIS / EN / Australian / Chinese grades, plus zinc coating designation comparison): https://chinacnu.com/wp-content/uploads/spec-sheets/ChinaCNU-Steel-Grade-Comparison-Chart.pdf

## Certificate records and verification

Page: https://chinacnu.com/certifications/

Current:
- Document: UDEM Attestation of Conformity
- Product identified: "Galvalume galvanized coated steel"; model/type list includes GI, PPGI, GL and PPGL. Consult the original for the complete list and exact wording.
- Holder: SHANDONG RUITONG NEW MATERIALS CO., LTD
- Certificate number: M.2025.206.C116831
- Issuer: UDEM International Certification Auditing Training Centre Industry and Trade Inc. Co.
- Standard stated: EN 10021:2006
- Regulation reference stated: Regulation (EU) No 305/2011 — Construction Products Annex V Clause 1.5
- Report reference: CE229204070350
- Registration / expiry: 10 April 2025 / 9 April 2030
- Original PDF: https://chinacnu.com/wp-content/uploads/certificates/ruitong-udem-attestation-M.2025.206.C116831.pdf
- Independent check: on 20 September 2026 the UDEM industry certificate search returned a matching company, certificate number, product and expiry date with status "Güncel" (current). To repeat the check, enter `SHA` in the company field and `M.2025.206.C116831` in the certificate-number field. Status can change — use the issuer's current record when assessing an order.

Not current — stated here so it is not mistaken for a live certificate:
- ISO 9001 certificate 47425Q0076R0S is **not** current. Its QR-linked verification record displayed "Revoked" on 20 September 2026. It must not be described as current certification.
- Historical copy, for reference only: https://chinacnu.com/wp-content/uploads/certificates/ruitong-iso9001-47425Q0076R0S-historical.pdf

## How to ask for a quotation

Send: product, grade, thickness, width, coating / paint system, colour (RAL or sample), quantity and destination port.

## Scope and limits of this file

- Specification ranges are reference values for the product family. The achievable range for a specific grade is narrower; confirm it per order.
- These reference sheets do not replace a grade-specific mill test certificate.
- Use following a declaration of conformity remains the manufacturer's responsibility and covers only the stated products.
- Nothing here is a price, an offer, or a guarantee of availability.