SLING CONSIDERATIONS - HEAT
ALLOY CHAIN SLINGS
ASME B30.9-1.8: E ects of Environment
9-1.8.1 Temperature
Extreme temperatures may reduce the performance of alloy steel chain slings. The sling manufacturer should be consulted when the slings are to be used in temperatures of -40 oF (-40 oC) or below. Rated load reductions for Grade 80 and Grade 100 alloy chain slings used at or after exposure to temperatures above 400 oF (204 oC) or higher are given in Table 9-1.8.1-1.
Shown below.
EFFECT OF ELEVATED TEMPERATURE ON THE WLL OF ALLOY CHAIN
    Temperature
Grade of Chain
 Grade 80
Grade 100
°F
°C
Reduction of Working Load Limit WHILE AT Temperature
Permanent Reduction of Working Load Limit AFTER EXPOSURE to Temperature
Reduction of Working Load Limit WHILE AT Temperature
Permanent Reduction of Working Load Limit AFTER EXPOSURE to temperature
Below 400
Below 204
None
None
None
None
400
204
10%
None
15%
None
500
260
15%
None
25%
5%
600
316
20%
5%
30%
15%
700
371
30%
10%
40%
20%
800
427
40%
15%
50%
25%
900
482
50%
20%
60%
30%
1000
538
60%
25%
70%
35%
Over 1000
Over 538
Remove from service
            OSHA 1910.184 (e) Alloy Steel Chain Slings
[§1910.184(e)(6)]
Safe operating temperatures. Employers must permanently remove an alloy steel chain slings from service if it is heated above 1000 oF. When exposed to service temperatures in excess of 600 oF, employers must reduce the maximum working load limits permitted by the chain manufacturer in accordance with the chain or sling manufacturer’s recommendations.
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