Material specification

Steel specifications

NORD-LOCK steel washers are made of Docol Bo 02 and Docol Bo 04 or equivalent material.
Docol Bo 02 corresponds to EN 1.5528 and Docol Bo 04 corresponds to EN 1.7182.

Norm	C %	Si %	Mn %	P %	S %	Cr %	Al %	B %	Ti %	N %
Docol Bo 02	0,20-0,25	0,20-0,35	1,00-1,30	≤0,025	≤0,008	0,15-0,25	0,020-0,080	0,0015-0,0050	0,020-0,050	-
EN 1.5528 (22MnB5)	0,19-0,25	≤0,40	1,10-1,40	≤0,025	≤0,015	0,15-0,35	0,020-0,060	0,0008-0,0050	0,020-0,050	-
Docol Bo 04	0,25-0,30	0,20-0,35	0,95-1,34	≤0,030	≤0,010	0,40-0,60	0,020-0,065	0,0015-0,0050	0,020-0,065	≤0,015
EN 1.7182 (27MnCrB5)	0,24-0,30	≤0,40	1,10-1,40	≤0,035	≤0,040	0,30-0,60	-	0,0008-0,0050	-	-

Stainless steel specifications (A4)

Stainless steel (A4) NORD-LOCK A4 washers are made of stainless steel EN 1.4404 or equivalent material.
The corresponding US standard is AISI 316L.

C %	Si %	Mn %	P %	S %	Cr %	Cu %	Mo %	N %	Ni %
≤0,03	≤1,00	≤2,00	≤0,045	≤0,015	16,5-18,5	-	2,00-2,50	≤0,110	10,0-13,0

Stainless steel specifications 254SMO

NORD-LOCK 254SMO washers are made of stainless steel EN 1.4547 or equivalent material.

C %	Si %	Mn %	P %	S %	Cr %	Cu %	Mo %	N %	Ni %
≤0,02	≤0,70	≤1,00	≤0,030	≤0,010	19,5-20,5	0,50-1,00	6,00-7,00	0,18-0,25	17,5-18,5

Stainless steel specifications Inconel® / Hastelloy® C-276

NORD-LOCK Inconel® / Hastelloy® C-276 washers are made of stainless steel EN 2.4819 or equivalent material.

C %

Si %

Mn %

P %

S %

Cr %

Cu %

Mo %

N %

Ni %

Co %

Fe %

V %

W %

≤0,01

≤0,08

≤1,00

≤0,020

≤0,015

14,5-16,5

≤0,50

15,00-17,00

≤2,50

4,00-7,00

≤0,35

3,00-4,50

Stainless steel specifications Inconel® 718

NORD-LOCK Inconel® 718 washers are made of stainless steel EN 2.4667 or equivalent material.

C %

Si %

Mn %

P %

S %

Cr %

Cu %

Mo %

N %

Ni %

Co %

Fe %

V %

W %

Al %

B %

Nb %

Ti %

Others %

≤0,08

≤0,4

≤0,015

17,0-21,0

≤0,3

2,8-3,3

≥50,0

≤1,0

22,0

0,2-0,8

≤0,006

4,8-5,5

0,6-1,2

≤0,5

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