Description: BBN steel is a well-known steel manufacturer and service provider in China, A588Grade A steel is our superior product, we are favored by customers with high quality, competitive price and excellent service
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram
ASTM A588 Grade A (A588 GrA) Weathering Corten Steel Plate | High-Strength Low-Alloy for Bridges, Rail Cars & Towers
Weathering / Atmospheric Corrosion Resisting Steel (A588 Gr A = Corten A) | Forms a Protective Oxide Film Outdoors | Bridge, Rail Car, Transmission Tower, Highway Pole, Chemical Plant & Shipbuilding | MTC & Third-Party Inspection
Atmospheric Corrosion ResistanceASTM A588 Grade A develops a dense, self-adhering protective oxide film on the surface in weather that slows further corrosion, superior to plain carbon steel.
High Strength (Gr A)Grade A delivers a minimum yield of 345 MPa (50 ksi) with 485 MPa minimum tensile, enabling lighter-section designs and cost reduction.
Unpainted ApplicationsIdeal for unpainted use where maintenance (e.g. painting) is reduced; widely used in bridges, rail cars and transmission towers.
01Product Overview & Specifications
ASTM A588 Grade A (also supplied as A588 GrA or traded as Corten A) is a high-strength low-alloy weathering steel. Its special chemistry builds a protective oxide film on the metal surface that slows further atmospheric corrosion, superior to regular carbon steel.
With a 50,000 psi (345 MPa) minimum yield, A588 GrA lets designers use lighter sections for cost reduction, and is the primary choice for unpainted outdoor structures such as bridges, rail cars, cranes, transmission towers and highway poles.
Item
Specification
Steel Grade
ASTM A588 Grade A (A588 GrA / Corten A) — high-strength low-alloy weathering steel
Hot RolledCold RolledAR / CR / N / TMCP / T / QTas per customer request
Thickness Range
All common thickness specscustomizable per MTC
Width × Length
Per order specification
MOQ
1 PC
Delivery Time
Promptly (Stock) / Custom production: 10 – 40 working days
Stock Status
In stock & custom productionconfirm current stock on inquiry
Certification
Mill Test Certificate (MTC) available, third-party inspection supported
Payment Terms
T/T, L/C At Sight
02Equivalent & Related Weathering Steel Standards
ASTM A588 Grade A is the U.S. standard weathering steel most often traded under the name Corten A. The grades below are its common international cross-references for engineering substitution; confirm composition limits and certification under the target standard before design-critical use.
Country / Standard System
Equivalent / Related Grade
ASTM (USA)
A588 Grade A / A588 GrA (this grade)
Corten (generic / trade)
Corten A
Germany (DIN, WNr)
WTSt 52-3
England (BS)
WR 50 C
Italy (UNI)
Fe 510 D2K1
Europe (EN)
S355J2G1W (EN 10025-5)
France (AFNOR) / China (GB) / Russia (GOST)
— (no direct one-to-one grade listed)
Note: ASTM A588 Grade A is widely known in the market as Corten A. The grades above (DIN WTSt 52-3, BS WR 50 C, UNI Fe 510 D2K1, EN 10025-5 S355J2G1W) are commonly referenced related weathering-steel standards. They share the atmospheric-corrosion-resisting concept but differ in exact composition limits and certification — verify against the ordered specification and Mill Test Certificate (MTC) before use.
03Grade Designation & Meaning
ASTM A588 Grade A (A588 GrA) — how the designation breaks down.
A588
A588 — ASTM Spec
A = ASTM standard; 588 = the specification number for high-strength low-alloy structural steel with atmospheric corrosion resistance.
GrA
GrA — Grade A
Grade A is the A-type of A588; with a 345 MPa (50 ksi) minimum yield it enables lighter-section designs and cost reduction.
Corten A
Corten A — Trade Name
A588 Gr A is the grade most often supplied under the trade name Corten A; both refer to the same atmospheric-corrosion-resisting steel.
50 ksi
50 ksi — Min Yield
The 50,000 psi minimum yield is the basis for "Gr50"-class light-weight design; A588 GrA meets this with 485 MPa minimum tensile.
A588 GrA processing note: A588 Grade A contains alloying elements (Cu, Cr, Ni, Si, P) that build its atmospheric-corrosion-resisting film, so forming is somewhat more difficult than plain carbon steel; it can be moderately drawn and is easily welded with common procedures (spot, TIG, MIG, MAG, electrode). Delivery is flexible: hot rolled, cold rolled, or AR/CR/N/TMCP/T/QT per customer request.
04Chemical Composition
Chemical composition of ASTM A588 Grade A weathering steel (ladle analysis, %). "Max" denotes maximum allowed; blank cells mean not specified in the provided analysis.
Element
Composition Range (%)
C (Carbon)
Max 0.19
Mn (Manganese)
0.80 – 1.25
P (Phosphorus)
Max 0.04
S (Sulfur)
Max 0.05
Si (Silicon)
0.30 – 0.65
Ni (Nickel)
Max 0.40
Cr (Chromium)
0.40 – 0.65
Cu (Copper)
0.25 – 0.55
V (Vanadium)
0.02 – 0.10
Mo (Molybdenum)
— (not specified)
Nb (Niobium)
— (not specified)
Note: Copper, chromium, nickel, silicon and phosphorus are the key alloying elements that build A588 GrA's atmospheric-corrosion-resisting oxide film; phosphorus and sulfur are maximum impurity limits. Molybdenum (Mo) and Niobium (Nb) are not specified in the provided analysis — the exact heat-analysis of each coil/plate is stated in its Mill Test Certificate (MTC).
05Mechanical Properties
Mechanical properties of ASTM A588 Grade A steel plate (minimum values per ASTM A588/A588M). Standard public data for the A588 (Grade 50) family.
Note: A588 Grade A is a weathering steel; the values above are minimum requirements per ASTM A588/A588M (standard public data for the Gr50 family). Because it contains more alloying elements than plain carbon steel, forming is somewhat more difficult and it can be moderately drawn; it is easily welded with common procedures. Charpy impact testing is available on request and confirmed in the MTC for your required condition.
06Product Types, Processing & Service
BBN Steel supplies ASTM A588 Grade A / A588 GrA (Corten A) weathering steel plates with flexible delivery conditions (hot rolled, cold rolled, AR/CR/N/TMCP/T/QT as requested). Plates are fully traceable with official Mill Test Certificates — ideal for unpainted outdoor structures.
1
Weathering Steel Plate
Hot-rolled / cold-rolled A588 GrA plates in all common thicknesses, customizable fixed length per your drawings.
2
Flexible Delivery
AR / CR / N / TMCP / T / QT as per customer request; stock and custom production both available.
3
Cutting & Processing
Custom cutting, flattening and processing; third-party inspection supported.
1
Fast Delivery
Common sizes shipped promptly from stock; custom production 10–40 working days.
2
MTC & Inspection
Mill Test Certificates available; third-party quality inspection supported.
3
Flexible Payment
T/T and L/C at sight accepted for your convenience.
4
24h Consultation
Professional sales team provides 24-hour online consultation and quotation.
ASTM A588 Grade A (A588 GrA, Corten A) high-strength low-alloy weathering steel plate
Develops a dense self-adhering protective oxide film outdoors — superior atmospheric corrosion resistance vs carbon steel
For bridges, rail cars, cranes, transmission towers, highway poles, chemical plants, factories and shipbuilding
For air preheaters, economizers, containers, railway carriages and building construction
Delivery: hot rolled, cold rolled, AR/CR/N/TMCP/T/QT as requested; MTC & third-party inspection
Get Your ASTM A588 Grade A (Corten A) Quotation Now
Send us your dimensions (thickness × width × length), quantity, and application (e.g. bridge, rail car or transmission tower). We will reply with stock status, competitive factory price and complete certification.
BBN Steel has established a complete set of production and supplier management system processes to ensure the improvement of product quality and better service to users.
Production Control
BBN Steel has established a complete production quality control process to ensure every link from research and development to mass production.
Supplier management
Our supplier selection will consider factors such as health and safety, ethics, environmental protection, price and quality to better serve customers.
Certification & Patent
We have successively won various international authoritative certifications, GB /T19001-ISO9001: 2000 quality management system was implemented.
After sales service
We provide booking space, shipping tracking service and after-sales service, we will always be first-class products and perfect pre-sale and after-sales service.
Get in Touch
Welcome to contact us through online consulting, emails and hotline if you are interested in our company or products. Our staff will reply you within 24 hours.
Address: HIGH-TECH DEVELOPMENT ZONE, ZHENGZHOU, CHINA
