ABS AH32 Steel Plate – Properties, Chemistry & Equivalents

ABS AH32 (also written AB/AH32, ABS Grade AH32, AH32 steel plate) is a higher-strength hull structural steel plate to ABS Rules Part 2, Chapter 1, Section 3. The figure 32 is the strength class (minimum yield 315 MPa, tensile 440-590 MPa) and the letter A sets the Charpy V-notch test temperature of 0°C. It is killed and fine-grain treated, with Nb, V, Ti or Al used as grain refiners, and corresponds to grade A32 in IACS UR W11 and AH32 in ASTM A131.

Related grades: ABS DH32 steel plate ABS EH32 steel plate ABS FH32 steel plate ABS AH36 steel plate.

Gangsteel is specialized in supplying ABS high strength steel plate in ABS Grade AH32. For more information of GradeAH32 steel plate, please check them in following:

 

AB/AH32 high Strength Chemical Composition

AB/AH32

ABS AH32 chemical composition, % – heat (ladle) analysis and product (check) analysis

Element	Heat analysis (max/min)	Product analysis
C	≤ 0.18	≤ 0.22
Mn	0.90–1.60	0.81–1.72
Si	0.10–0.50	0.04–0.56
P	≤ 0.035	≤ 0.045
S	≤ 0.035	≤ 0.045
Al (acid-soluble)	≥ 0.015	— (no tolerance in ASTM A6 Table A; product value not given)
Nb	0.02–0.05	0.010–0.060
V	0.05–0.10	0.040–0.110
Ti	≤ 0.02	≤ 0.03
Cu	≤ 0.35	≤ 0.38
Cr	≤ 0.20	≤ 0.24
Ni	≤ 0.40	≤ 0.43
Mo	≤ 0.08	≤ 0.09

Al, Nb and V minima apply when used singly (combined minima per ABS 2-1-3/5); Si min does not apply where acid-soluble Al ≥ 0.015%; AH ≤ 12.5 mm may have Mn min 0.70%. Product analysis = heat limit ± ASTM A6/A6M Table A permitted variation (band chosen by the specified maximum/upper limit); applies only when product (check) analysis is required; for a range, results may not vary both above and below it. Per ABS Rules for Materials and Welding Part 2 (2022); product analysis tolerances per ABS 2-1-2/5.3 (“chemical tolerances of ASTM A6”) and ASTM A6/A6M 7.2, Table A (also invoked by ASTM A131). Heat limits: ABS 2-1-3/7.3 Table 1 (t ≤ 150 mm).

 

Crack Sensitivity:  Pcm = (C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B)%
Carbon Equivalent:  Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%

 

 

AB/AH32 high strength property

AB/AH32

ABS AH32 mechanical properties by thickness

Thickness (mm)	Yield min (MPa)	Tensile (MPa)	Elongation A5 min (%)	Charpy test temp (°C)	Impact avg min, longitudinal (J)	Impact avg min, transverse (J)
t≤50	315	440-590	22	0	31	22
50<t≤70	315	440-590	22	0	38	26
70<t≤100	315	440-590	22	0	46	31

Source: ABS Rules Pt 2, 2-1-3 Tables 2 & 4. Either direction acceptable.

Boiler steel plates| Alloy steel plates| High strength plate| Carbon steel plate

 

 

 

 

Equivalent steel grade of AB/AH32
DNV	GL	LR	BV	CCS	NK	KR	RINA
NV A32	GL-A32	LR/AH32	BV/AH32	CCS/A32	K A32	R A32	RI/A32

 

 

 

 

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

 

 Related steel grades: AB/AH36, AB/AH36, AB/DH32, AB/EH32

 

 

ABS Steel Plate Grade Supplier
General Strength	AB/A	AB/B	AB/D	AB/E
High Strength	AB/AH32	AB/DH32	AB/EH32	AB/FH32
	AB/AH36	AB/DH36	AB/EH36	AB/FH36
	AB/AH40	AB/DH40	AB/EH40	AB/FH40
Extra Strength	AB/AQ43	AB/DQ43	AB/EQ43	AB/FQ43
	AB/AQ47	AB/DQ47	AB/EQ47	AB/FQ47
	AB/AQ51	AB/DQ51	AB/EQ51	AB/FQ51
	AB/AQ56	AB/DQ56	AB/EQ56	AB/FQ56
	AB/AQ63	AB/DQ63	AB/EQ63	AB/FQ63
	AB/AQ70	AB/DQ70	AB/EQ70	AB/FQ70

 

 

ABS AH32 thickness and impact requirements

ABS impact energy rises with plate thickness. ABS AH32 is tested at 0°C. Minimum average energies (full-size specimens):

• t≤50 mm: 31 J longitudinal / 22 J transverse
• 50<t≤70 mm: 38 J longitudinal / 26 J transverse
• 70<t≤100 mm: 46 J longitudinal / 31 J transverse

The ABS tables cover plates up to 150 mm. Plates thicker than 100 mm, or produced from coil, have extra rules in ABS Part 2, Chapter 1, Section 1.

ABS AH32 equivalent grades

Standard / society	Equivalent grade
ABS	AB/AH32
IACS UR W11	A32 (also written AH32)
ASTM A131	AH32
DNV	VL A32
LR / BV / CCS / RINA	AH32
NK	KA32
KR	RA32

Grades are equivalent in chemistry and properties because the IACS societies use the same unified requirements. A plate still needs a certificate from the vessel's own classification society, so one plate can carry dual or multiple class certification only when each society's surveyor tests it.

ASTM equivalent: ASTM A131 AH32 steel plate

LR equivalent: LR AH32 steel plate