Steel Supplier & Manufacturer | Luyuan Steel

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Automotive Cold Rolled Steel: Grades and Applications

Compare SPCC, SPCD and SPCE automotive cold rolled steel, then specify thickness, formability, surface quality and inspection for stamped vehicle parts.

08-17 2026
Galvanized Steel Pipe Sizes: Buyer’s Selection Chart

A practical galvanized steel pipe sizes chart for drainage, greenhouse and infrastructure buyers, covering diameter, wall thickness, length, grade, coating and RFQ checks.

08-15 2026
What Is a GP Sheet? Galvanized Plain Sheet Specs and Uses

GP sheet explained against GI, GC and GL terminology, with zinc coating class conversions, grade designations and the parameters an importer needs on the purchase order.

08-14 2026
PPGI Sheet Guide: Coatings, Thickness and PPGL Options

What PPGI and PPGL actually specify — substrate grade, metallic coating, paint system and published thickness ranges — plus the ordering parameters a roll-former needs before quoti…

08-14 2026
Galvalume Sheet Specs: Thickness, AZ Coating and Grades

Galvalume sheet and coil specs for export buyers — mm thickness ranges, AZ vs Z coating classes, S350GD and DX51D grade designations, and what to fix before requesting a quote.

08-14 2026
PPGI Coil Buying Guide for Roofing Manufacturers

A practical PPGI coil buying guide for roofing manufacturers covering thickness, coating, paint, forming checks, inspection, packing, and RFQ details.

08-14 2026
Galvanized Steel Coil: Grades, Coatings and Uses

A buyer-focused guide to galvanized steel coil grades, zinc coating targets, dimensions, inspection documents, and RFQ checks.

08-13 2026
Which Is the Strongest Roof Sheet? A Best Roofing Sheet Guide for Metal Roof Projects

Which is the strongest roofing sheet? For most industrial and commercial buildings, a properly engineered structural-grade corrugated or trapezoidal steel roof sheet offers the bes…

08-06 2026
What Is PPGI Roofing? PPGI vs PPGL Material Guide

PPGI roofing is made from pre-painted galvanized steel that combines a zinc-coated substrate with primer and colored paint. This guide explains how PPGI roofing sheets are produced…

08-06 2026

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