CCS EH40 Steel Plate – Properties, Chemistry & Equivalents

CCS EH40 (also written CCS/EH40, CCS Grade EH40, CCS E40 or EH40 steel plate) is a higher-strength hull structural steel plate certified by the China Classification Society (CCS) to CCS Rules for Materials and Welding (2024), Part 1, Chapter 3, Section 3. The figure 40 is the strength level (minimum yield 390 MPa, tensile 510–660 MPa) and the letter E sets the Charpy V-notch test temperature of −40°C. The steel is killed and fine-grain treated, and the grade corresponds to EH40 in IACS UR W11 and EH40 in ASTM A131.

Gangsteel, a steel plate exporter, supplies CCS EH40 plate with CCS class certificates; the requirements below are taken directly from the current CCS rules.

Related CCS grades: CCS AH40 steel plate, CCS DH40 steel plate, CCS FH40 steel plate, CCS EH32 steel plate, CCS EH36 steel plate.

CCS EH40 chemical composition

CCS EH40 chemical composition, heat (ladle) analysis, %

Element	Heat analysis
C	≤ 0.18
Mn	0.90–1.60 (≥ 0.70 for t ≤ 12.5 mm)
Si	≤ 0.50
P	≤ 0.035
S	≤ 0.035
Al (acid soluble)	≥ 0.015
Nb	0.02–0.05
V	0.05–0.10
Ti	≤ 0.02
Nb + V + Ti	≤ 0.12
Cu	≤ 0.35
Cr	≤ 0.20
Ni	≤ 0.40
Mo	≤ 0.08

 

Source: CCS Rules for Materials and Welding (2024), Part 1, Chapter 3, Table 3.3.2.1. Al, Nb and V are grain-refining elements: when used in combination, the individual minimum contents do not apply. Total Al ≥ 0.020% may be reported instead of acid-soluble Al. TMCP plates must also meet the Ceq limits below. CCS specifies the chemical composition as a heat (ladle) analysis only; the Rules give no product (check) analysis tolerances for these plates, so no product-analysis column is shown. If a product analysis is required, agree the tolerances in the order.

CCS EH40 mechanical properties and impact test

CCS EH40 tensile and Charpy V-notch requirements

Grade	Yield ReH min (MPa)	Tensile Rm (MPa)	Elongation A5 min (%)	Test temp.	KV avg min, t ≤ 50 mm, L / T (J)	50 < t ≤ 70 mm, L / T (J)	70 < t ≤ 150 mm, L / T (J)
CCS EH40	390	510–660	20	−40°C	39 / 26	46 / 31	55 / 37

Source: CCS Rules for Materials and Welding (2024), Part 1, Chapter 3, Table 3.3.4.3. L = longitudinal, T = transverse. Impact tests are normally made longitudinally; transverse values must be guaranteed by the mill.

CCS EH40 maximum carbon equivalent for TMCP plates

Thickness	t ≤ 50 mm	50 < t ≤ 100 mm	100 < t ≤ 150 mm
Ceq max (%)	0.40	0.42	0.45

Ceq = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15, from the ladle analysis (Table 3.3.2.3(1)). For non-TMCP plates a Ceq limit may be agreed.

CCS EH40 thickness range and delivery condition

The CCS rules for CCS EH40 cover plates and wide flats up to 150 mm thick (sections and bars up to 50 mm). EH40 plates must be normalized or TMCP (or quenched and tempered), with an impact test on each piece. The required Charpy energy increases above 50 mm and again above 70 mm.

CCS EH40 equivalent grades

CCS EH40 equivalent grades of other classification societies

Standard / society	Equivalent grade
IACS UR W11	EH40
ABS	AB/EH40
DNV	VL E40
LR	LR EH40
BV	BV EH40
ASTM A131	EH40
China GB/T 712	EH40

The IACS member societies use the same unified requirements, so these grades match in chemistry and properties. A plate still needs the certificate of the vessel’s own class society; one plate can carry dual or multiple class certification only when each society’s surveyor witnesses the tests.

CCS EH40 FAQ

What does EH40 mean?

E sets the toughness grade (Charpy test at −40°C), H means higher strength, and 40 is the strength level: minimum yield 390 MPa.

What is the yield strength of CCS EH40?

Minimum 390 MPa, tensile strength 510–660 MPa and minimum elongation 20%.

What is the impact test temperature of CCS EH40?

−40°C. Minimum average energy is 39 J longitudinal / 26 J transverse up to 50 mm, 46/31 J for 50–70 mm and 55/37 J for 70–150 mm.

What is CCS EH40 equivalent to?

EH40 of IACS UR W11, ABS AB/EH40, DNV VL E40, LR and BV EH40, ASTM A131 EH40 and GB/T 712 EH40.

What is the difference between AH40, DH40, EH40 and FH40?

They share the same chemistry limits (FH has tighter C, P and S limits, an N limit and a higher Ni allowance) and the same strength. Only the Charpy test temperature changes: 0°C (A), −20°C (D), −40°C (E) and −60°C (F).

What is the difference between CCS EH40 and ABS EH40?

Both are the same IACS UR W11 grade, so in practice they are interchangeable technically; the difference is the class certificate.

What is the carbon equivalent (CEV) of CCS EH40?

For TMCP plates Ceq must not exceed 0.40% up to 50 mm, 0.42% for 50–100 mm and 0.45% for 100–150 mm. For other conditions a Ceq limit may be agreed with the buyer.

What thickness range does CCS cover for EH40?

Plates and wide flats up to 150 mm; sections and bars up to 50 mm.

Equivalent steel grade of CCS/EH40
DNV	GL	LR	BV	RINA	NK	KR	ABS
NV E40 (DNV E40 steel plate)	GL-E40	LR/EH40	BV/EH40	RI/E40	K E40	R E40	AB/E40

If you need more stock steel plates in shipbuilding steel plate, please click warehouse sizes.

 Related steel grade: CCS/AH40, CCS/DH40, CCS/FH40, CCS/B

 

CCS Steel Plate Grade
General Strength	CCS/A	CCS/B	CCS/D	CCS/E
High Strength	CCS/A32	CCS/D32	CCS/E32	CCS/F32
	CCS/A36	CCS/D36	CCS/E36	CCS/F36
	CCS/A40	CCS/D40	CCS/E40	CCS/F40
Extra Strength	CCS/A420	CCS/D420	CCS/E420	CCS/F420
	CCS/A460	CCS/D460	CCS/E460	CCS/F460
	CCS/A500	CCS/D500	CCS/E500	CCS/F500
	CCS/A550	CCS/D550	CCS/E550	CCS/F550
	CCS/A620	CCS/D620	CCS/E620	CCS/F620
	CCS/A690	CCS/D690	CCS/E690	CCS/F690

 

ASTM equivalent: ASTM A131 EH40 steel plate

LR equivalent: LR EH40 steel plate