Description: BBN steel is a well-known steel manufacturer and service provider in China, A242 Type 1 high strength atmospheric corrosion resisting 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 A242 Type 1 (A242 T1) Weathering Corten Steel Plate | Atmospheric Corrosion Resisting Steel for Bridges, Containers & Construction
Weathering / Atmospheric Corrosion Resisting Steel (A242 Type 1 = original Corten-type) | Forms a Protective Oxide Film Outdoors | Air Preheater, Economizer, Railway Carriage, Containers, Bridge & Construction | MTC & Third-Party Inspection
Atmospheric Corrosion ResistanceASTM A242 Type 1 develops a dense, self-adhering protective oxide film on the surface in weather that slows further corrosion, superior to plain carbon steel.
Original Corten-type SteelA242 Type 1 is the earliest U.S. weathering steel (the original Corten-type grade), widely known and traded as Corten steel for unpainted outdoor structures.
High StrengthDelivers 345 MPa (50 ksi) minimum yield for plates up to 100 mm with 485 MPa minimum tensile, enabling lighter-section designs and cost reduction.
01Product Overview & Specifications
ASTM A242 Type 1 (also supplied as A242 T1 or traded as Corten) 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 for plates up to 100 mm, A242 Type 1 lets designers use lighter sections for cost reduction, and is the primary choice for unpainted outdoor and highly-corrosive-environment structures such as air preheaters, economizers, railway carriages, containers, bridges and buildings.
Hot RolledCold RolledAR / CR / N / TMCP / T / QTas per customer request
Thickness Range
All common thickness specsmechanical property scope up to 200 mm (plates & bars); customizable 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 A242 Type 1 is the original U.S. weathering steel, widely known in the market as Corten (the Corten-type steel). For new designs it is commonly substituted by ASTM A588 Grade A (Corten A) — confirm composition limits and certification under the target standard before design-critical use.
Country / Standard System
Equivalent / Related Grade
ASTM (USA)
A242 Type 1 (this grade)
Corten (generic / trade)
CortenA242 Type 1 is the original Corten-type steel
Modern substitute (ASTM)
A588 Grade A / Corten Acommonly used for new designs (standard public reference)
France (AFNOR) / China (GB) / Russia (GOST)
— (no direct one-to-one grade listed)
Note: ASTM A242 Type 1 is widely known as Corten steel. ASTM A588 Grade A (Corten A) is the modern grade most often used as its substitute in new projects; both 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 A242 Type 1 (A242 T1) — how the designation breaks down.
A242
A242 — ASTM Spec
A = ASTM standard; 242 = the specification number for high-strength low-alloy structural steel with atmospheric corrosion resistance.
T1
Type 1 — Type
Type 1 is the composition type of A242; it is the grade most often supplied as weathering / Corten steel.
Corten
Corten — Trade Name
A242 Type 1 is the original Corten-type steel, widely traded under the name Corten for unpainted outdoor structures.
50 ksi
50 ksi — Min Yield
The 50,000 psi minimum yield (345 MPa for plates up to 100 mm) is the basis for lighter-section design; A242 Type 1 meets this with 485 MPa minimum tensile.
A242 Type 1 processing note: A242 Type 1 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 A242 Type 1 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 A242 Type 1'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 A242 Type 1 steel (minimum values per ASTM A242/A242M, by product form and thickness). Thickness-dependent yield applies to plates & bars.
Note: A242 Type 1 is a weathering steel; the values above are minimum requirements per ASTM A242/A242M (standard public data). Yield strength is thickness-dependent for plates & bars (345 MPa at ≤ 100 mm, reducing to 290 MPa above 125 mm). 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 A242 Type 1 / A242 T1 (Corten) weathering steel plates & sheets 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 highly corrosive outdoor environments.
1
Weathering Steel Plate & Sheet
Hot-rolled / cold-rolled A242 Type 1 plates & sheets 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.
Develops a dense self-adhering protective oxide film outdoors — superior atmospheric corrosion resistance vs carbon steel
For air preheaters, economizers, railway carriages, containers, bridges and construction
For chemical plants, fertilizer plants, power plants, sugar mills and other highly corrosive plants
Delivery: hot rolled, cold rolled, AR/CR/N/TMCP/T/QT as requested; MTC & third-party inspection
BBN Steel is a leading exporter, supplier, stockist and manufacturer of Corten ASTM A242 Type 1 plate & sheet
Get Your ASTM A242 Type 1 (Corten) Quotation Now
Send us your dimensions (thickness × width × length), quantity, and application (e.g. air preheater, container or bridge). 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.
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We have successively won various international authoritative certifications, GB /T19001-ISO9001: 2000 quality management system was implemented.
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