Padlock Security and Corrosion Resistance

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Padlock security and corrosion resistance guide.

The majority of Lockwood Padlocks carry a security rating and corrosion resistance rating to enable customers to select the padlock and accessory of an identical rating to maximise the performance of the padlock.

When selecting a padlock and accessory, always consider:

The value you place on the property to be protected.
The level of protection required.
Size and strength of the padlock and accessory.
The environment in which the product will be used.

AUSTRALIAN STANDARD - AS 4145.4 2002 - Part 4: PADLOCKS

The Australian Standard AS 4145.4 enables the true evaluation of the physical security and corrosion resistance of padlocks and padlock accessories (excluding chains). The standard specifies performance requirements and describes test methods for strength, security, function and corrosion. Requirements that relate to security are classified in ten grades, based on performance tests that simulate attack. The security rating is based on the lowest test result achieved.

Test methods are specified in detail to ensure reproduction and consistency of assessment.

Chains not covered in the standard have been tested using the same test requirements and carry the appropriate Lockwood security rating.

For more information please click on the headings below

SP | Physical Security

Ten physical security grades are employed for padlocks. These grades are defined in part by the effective differs and key combinations.

DESCRIPTION	GRADE										UNIT
-	SP1	SP2	SP3	SP4	SP5	SP6	SP7	SP8	SP9	SP10	-
Minimum number of effective key differs	300	500	750	1000	1500	2000	2500	5000	10000	20000	-
Minimum number of effective combinations	5000	5000	5000	5000	5000	5000	5000	50000	50000	50000	-
Torque on key	1	1	1	1	1	1.5	1.5	1.5	1.5	1.5	Nm
Resistance to force on cylinder plug or locking mechanisim	0	0	0	0	1	2	4	5	10	15	kN
Resistance to torque on cylinder plug or locking mechanisim	0	0	1	2	3	4	5	15	20	30	Nm
Resistance to pulling	1	3	4	5	8	15	25	40	70	100	kN
Resistance to twisting of shackle	40	60	80	100	150	200	300	600	1200	2500	Nm
Resistance to cutting of shackle	6	9	12	15	20	25	35	50	70	100	kN
Resistance to impact on padlock body and shackle at low temp	0	0	0	0	0	5	10	30	90	110	j
	-	-	-	-	-	-20	-20	-20	-20	-20	°C
Resistance to drilling of padlock body, shackle and staple	0	0	0	0	0	0	0	2	4	8	min
Resistance to sawing of padlock body, shackle (and staple where applicable)	0	0	0	0	0	0	0	2	4	8	min
Durability (minimum requirement)	D1 (5000)			D2 ( 25000)				D3 (100000)			cycles
Corrosion (minimum requirement)	C2			C3				C4			-
Keying Security (AS4145.2)	K1 to K4							min K5			-

For more detailed information please refer to Australian Standards AS4145.1, AS4145.2 and AS4145.4

K | Keying Security

10 grades of Keying security are available. K5 is only acceptable for grades SP8 - SP10 if the padlock body or other means prevents the drilling of the cylinder.

DESCRIPTION	GRADE
*Grade Physical Security* >	SP1 - SP7				SP8-SP9
*Keying Security AS 4145.2 Security>*	K1-K4				*min K5*
*AS4145.2 Number >*	K1	K2	K3	K4	K5	K6	K7	K8	K9	*K10*
Key design / minimum differs available	300	500	750	1000	1500	2000	2500	5000	10000	20000
Design registration of security feature	-	-	-	-	-	-	yes	-	yes	-
Patented security feature - key	-	-	-	-	-	-	-	yes	yes	-
Patented keying system - cylinder	-	-	-	-	-	-	-	yes	yes	-
Key Control level 1	yes	yes	yes	yes	yes	-	-	-	-	-
Key Control level 2	-	-	-	-	-	yes or*	-	-	-	-
Key Control level 3 - Proprietary system, owner or distributor-controlled system with a traceable key	-	-	-	-	-	yes	yes or	yes or	yes or	-
Key Control level 3 - Proprietary, manufacturer, or owner-controlled system with a traceable key	-	-	-	-	-	-	yes	yes	yes	-

* For example, K6 keying security can have either key Control Level 2 or key Control Level 3

Note: K5 is only acceptable for grades SP8 - SP10 if the padlock body or other means prevents the drilling of the cylinder.

For more detailed information please refer to Australian Standards AS4145.1, AS4145.2 and AS4145.4

D | Durability

Three durability grades are employed for padlocks. The 10 physical security grades are also defined in-part by durability performance.

DESCRIPTION	GRADE
-	D1			D2				D3
Minimum requirement (cycles)	5000			25000				100000
Physical Security	SP1	SP2	SP3	SP4	SP5	SP6	SP7	SP8	SP8	SP10

For more detailed information please refer to Australian Standards AS4145.1, AS4145.2 and AS4145.4

C | Corrosion Resistance

All Lockwood padlocks and padlock accessories are exposed to an accelerated corrosion test to evaluate their resistance to corrosion. Exposure is to a neutral salt spray in accordance with related Australian standards. Padlocks and padlock accessories are classified in five grades as listed below

CATEGORY	EXPOSURE ENVIRONMENT
C1- Very Low	Not applicable.
C2 - Low	Environments that are normally dry, including the majority of interiors
C3 - Moderate	Environments that are sometimes damp in the majority of rural and suburban localites, including interiors where condensation may occur
C4 - High	Environments that are often wet and/or subject to slight pollution by sulpher dioxide, acid, alkali or salt, including some particularly damp interiors and the majority of exterior environments.
C5 - Very High	Environments in very corrosive localities such as those subject to effect (or combination) of industrial and coastal conditions.

The padlocks and padlock accessories are exposed to the neutral salt spray for up to 240 hours (Grade 5). After the test it must be possible to operate the padlock with its key in the normal manner.

For more detailed information please refer to Australian Standards AS4145.1, AS4145.2 and AS4145.4