World-leading

Each day, you will find us at work with over 100,000 customers, in more than 100 countries, building the invisible infrastructure of trust. We are the leading provider of risk management and quality assurance services to the maritime, oil and gas, and power and renewables industries. We are also global leaders in certifying management systems of companies across all types of industries, including healthcare, food and beverage, automotive and aerospace.

Our purpose

Since 1864, our purpose has been to safeguard life, property and the environment. 

Expertise

We are passionate about safety, quality and integrity. Companies turn to us to make complex decisions with confidence. We help them manage their most critical risks and demonstrate compliance with regulations and standards. From structural defects at a molecular level, to an anomaly in terabytes of data, no detail is too small for our world-class technical experts. But it is our ability to also see the bigger picture that sets us apart: from advising on tomorrow's energy infrastructure to creating technical standards for the safety of the world's shipping fleet, or assessing the sustainability of a food value chain.

Shipbuilding Steel Grades and Equivalent

Shipbuilding steel grades and equivalent are specified in the specifications of each classification society in the table below.

ASTM A131	Classification Society Standard
	ABS	BV	CCS	DNV	GL	KR	LR	NK	RINA
A131 A	ABS A	BV A	CCS A	DNV A	GL A	KR A	LR A	NK A	RINA A
A131 B	ABS B	BV B	CCS B	DNV B	GL B	KR B	LR B	NK B	RINA B
A131 D	ABS D	BV D	CCS D	DNV D	GL D	KR D	LR D	NK D	RINA D
A131 E	ABS E	BV E	CCS E	DNV E	GL E	KR E	LR E	NK E	RINA E
A131 AH32	ABS AH32	BV AH32	CCS AH32	DNV AH32	GL AH32	KR AH32	LR AH32	NK AH32	RINA AH32
A131 DH32	ABS DH32	BV DH32	CCS DH32	DNV DH32	GL DH32	KR DH32	LR DH32	NK DH32	RINA DH32
A131 EH32	ABS EH32	BV EH32	CCS EH32	DNV EH32	GL EH32	KR EH32	LR EH32	NK EH32	RINA EH32
A131 FH32	ABS FH32	BV FH32	CCS FH32	DNV FH32	GL FH32	KR FH32	LR FH32	NK FH32	RINA FH32
A131 AH36	ABS AH36	BV AH36	CCS AH36	DNV AH36	GL AH36	KR AH36	LR AH36	NK AH36	RINA AH36
A131 DH36	ABS DH36	BV DH36	CCS DH36	DNV DH36	GL DH36	KR DH36	LR DH36	NK DH36	RINA DH36
A131 EH36	ABS EH36	BV EH36	CCS EH36	DNV EH36	GL EH36	KR EH36	LR EH36	NK EH36	RINA EH36
A131 FH36	ABS FH36	BV FH36	CCS FH36	DNV FH36	GL FH36	KR FH36	LR FH36	NK FH36	RINA FH36
A131 AH40	ABS AH40	BV AH40	CCS AH40	DNV AH40	GL AH40	KR AH40	LR AH40	NK AH40	RINA AH40
A131 DH40	ABS DH40	BV DH40	CCS DH40	DNV DH40	GL DH40	KR DH40	LR DH40	NK DH40	RINA DH40
A131 EH40	ABS EH40	BV EH40	CCS EH40	DNV EH40	GL EH40	KR EH40	LR EH40	NK EH40	RINA EH40
A131 FH40	ABS FH40	BV FH40	CCS FH40	DNV FH40	GL FH40	KR FH40	LR FH40	NK FH40	RINA FH40
-	ABS AQ43	BV AH420	CCS AH420	DNV A420	GL A420	KR AH43	LR AH42	KA43	RINA A420
-	ABS DQ43	BV DH420	CCS DH420	DNV D420	GL D420	KR DH43	LR DH42	KD43	RINA D420
-	ABS EQ43	BV EH420	CCS EH420	DNV E420	GL E420	KR EH43	LR EH42	KE43	RINA E420
-	ABS FQ43	BV FH420	CCS FH420	DNV F420	GL F420	KR FH43	LR FH42	KF43	RINA F420
-	ABS AQ47	BV AH460	CCS AH460	DNV A460	GL A460	KR AH47	LR AH46	KA47	RINA A460
-	ABS DQ47	BV DH460	CCS DH460	DNV D460	GL D460	KR DH47	LR DH46	KD47	RINA D460
-	ABS EQ47	BV EH460	CCS EH460	DNV E460	GL E460	KR EH47	LR EH46	KE47	RINA E460
-	ABS FQ47	BV FH460	CCS FH460	DNV F460	GL F460	KR FH47	LR FH46	KF47	RINA F460

from: https://www.dnvgl.com/