Description: BBN steel is a well-known steel manufacturer and service provider in China, ASTM A131 EH32 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
High-Strength Low-Temperature Marine Structural Steel | 315 MPa Min. Yield Strength (46 ksi) | 440–590 MPa Tensile Strength (64–85 ksi) | Mandatory −40°C Charpy V-notch Impact Test | For Shipbuilding & Offshore Structural Projects | MTC, EN 10204 3.1 & Classification Society Inspection
−40°C Impact ToughnessMandatory −40°C Charpy V-notch impact test — resists low-temperature brittle fracture in frigid marine service.
High Strength (315 MPa / 46 ksi)Noticeably higher yield than ordinary mild steel, with 440–590 MPa tensile strength for demanding hull and offshore structures.
Weldability with Pcm / Ceq ControlCarbon equivalent and crack sensitivity indicators guide on-site welding and help avoid cold cracks.
01Product Overview
ASTM A131 EH32 is a high-strength low-temperature resistant marine structural steel grade defined in the ASTM A131 / A131M standard, which covers structural steel plates, shapes, bars and rivets mainly used in ship construction. Compared with ordinary mild steel, EH32 delivers a higher 315 MPa (46 ksi) minimum yield strength together with stable −40°C Charpy V-notch impact toughness, making it suitable for vessels and marine structures serving in cold and demanding sea conditions.
Manufactured by hot rolling with normalized or TMCP (thermo-mechanical control process) treatment, EH32 shipbuilding steel provides reliable structural strength, good weldability and consistent impact resistance. It is widely applied to hull structures, decks and offshore structural members where a verified −40°C toughness level is required by the building specification.
Code
Designation Meaning
A131
ASTM specification for structural steel used in ship construction (plates, shapes, bars, rivets)
E
Impact toughness level — mandatory −40°C Charpy V-notch test (the highest level in the A / D / E series)
H
High strength (high tensile) marine structural grade
Note — A131 high-strength family: Within the ASTM A131 high-strength (H) family, EH32 shares the 315 MPa (46 ksi) yield level with AH32 (0°C impact) and DH32 (−20°C impact); the higher-strength EH36 grade (360 MPa) carries the same −40°C toughness requirement as EH32.
02Specifications
Item
Specification Details
Steel Grade
ASTM A131 EH32
Executive Standard
ASTM A131 / A131M International Standard
Product Type
High-strength low-temperature marine structural steel plate (shapes, bars & rivets also covered by the spec)
Low-temperature Test
−40°C Charpy V-notch Impact Test (mandatory)
Surface Condition
Smooth surface, uniform texture, no cracks, no rust spots
MOQ
1 Ton / Negotiable
Certification
MTC / EN 10204 3.1 / Third-party marine classification inspection
Payment Terms
T/T, L/C, Western Union, Trade Assurance
Note: Standard plate dimensions (thickness, width, length) and stock / lead time are confirmed per individual order and rolling schedule. Please send your required sizes and quantity for a formal quotation.
03Chemical Composition
ASTM A131 EH32 adopts an optimized low-alloy component formula with strict impurity control (max mass fraction % unless given as a range) — the composition below ensures high structural strength and stable low-temperature toughness while maintaining good weldability.
Element
Composition
C (Carbon)
≤ 0.18
Mn (Manganese)
0.90 – 1.60
Si (Silicon)
0.10 – 0.50
P (Phosphorus)
≤ 0.035
S (Sulfur)
≤ 0.035
Note: Values above are the limits specified in ASTM A131 / A131M for grade EH32. Additional micro-alloying and residual elements (such as Al, Nb, V, Ti, Cu, Cr, Ni) are controlled by the standard and stated in the Mill Test Certificate (MTC / EN 10204 3.1) supplied with delivery.
04Welding Performance Parameters
Professional carbon equivalent and crack sensitivity coefficient indicators guide on-site welding construction — helping to avoid welding cold cracks and structural defects under low-temperature conditions.
Note: Pcm and Ceq are calculated from the actual heat analysis of each plate and recorded in the MTC. Lower values mean better weldability and lower preheat requirement — please confirm preheat and interpass temperature with your welding procedure specification (WPS) for −40°C service.
05Mechanical Properties
All mechanical performance indicators of ASTM A131 EH32 strictly comply with the ASTM A131 / A131M standard — a 315 MPa minimum yield, 440–590 MPa tensile strength, good ductility and a mandatory −40°C low-temperature impact test.
315 MPaMin. Yield Strength46 ksi
440–590 MPaTensile Strength64–85 ksi
19%Elongation Min.Per ASTM A131
−40°CCharpy Impact TestMandatory
Property
Requirement
Yield Strength (Min)
315 MPa (46 ksi)
Tensile Strength
440 – 590 MPa (64 – 85 ksi)
Elongation (Min)
19%
Impact Test
−40°C Charpy V-notch (mandatory)
Note: The specified absorbed impact energy and any thickness-dependent limits are stated in ASTM A131 / A131M and recorded in each plate’s Mill Test Certificate (MTC). Confirm the exact values with your order specification.
06Application Fields
Benefiting from high structural strength, reliable −40°C low-temperature toughness and good weldability, A131 EH32 shipbuilding steel plate is mainly used in shipbuilding projects and ocean offshore structural projects.
Shipbuilding Projects
Hull structures, decks, bulkheads and other primary members of ocean-going and specialized vessels.
Offshore Structural Projects
Fixed and floating offshore platforms, marine substructures and load-bearing members in cold-sea service.
Marine Equipment
Structural parts requiring verified low-temperature toughness, such as port, ice-zone and supporting marine components.
07Processing, Inspection & Service
Flexible plates and one-stop processing to meet marine engineering construction requirements — with strict classification society inspection and complete certification documents.
1
Confirm Sizes & Stock
Send required thickness, width, length and quantity; we confirm stock and rolling schedule per inquiry.
2
Custom Processing
Custom cutting, bending and precision finishing per client drawings.
3
Classification Inspection
Third-party marine classification society inspection supported for every order.
4
Marine Certification
Official MTC test reports and complete marine certification documents with delivery.
Custom sizes, cutting, bending and precision finishing per client drawings
Mandatory −40°C Charpy V-notch impact test performed with results in the MTC
MTC, EN 10204 3.1 and third-party marine classification inspection supported
Get Your ASTM A131 EH32 Shipbuilding Steel Quotation Now
Send us your thickness, width & length (or part drawings), quantity and classification society requirements. We will reply with stock status, price, delivery time and complete marine certification documents.
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