Rubber at Low Temperature: What ASTM D2137 Covers and What to Ask a Maker

What the ASTM page says

The standard defines a test, and the scope is what it actually covers.

• Scope: the test methods “cover the determination of the lowest temperature at which rubber vulcanizates and rubber-coated fabrics will not exhibit fractures or coating cracks when subjected to specified impact conditions”.
• Use: the page says the methods “have been found useful for specification and development purposes but do not necessarily indicate the lowest temperature at which the material may be used”.
• The standard does not address all safety concerns; users must establish their own practices.

In plain terms, the result is a brittleness point under an impact test. By ASTM’s own wording it is not a promise about how a plow component behaves in service.

Why that matters for plow parts

Plow parts see impact and flex, which is what the test approximates.

• A plow edge segment sees repeated impact and flexing, not a single laboratory impact.
• The page covers rubber vulcanizates, not a finished part with steel and carbide parts.
• I have no evidence about which rubber compounds blade makers use or how they test them.

Questions to ask a maker

What to do with the answers

Put the answers on file with the purchase. If the maker cannot say how the rubber was tested, treat that as unknown and trial the part on a few trucks through a cold spell before a large order. Log any cracking with the temperature and date.

Limits

I read only the ASTM store page and not the standard text. I make no claim about any product.

Boundary: Only the ASTM store page was read, not the standard itself; no claim is made about any maker’s rubber, and a brittleness point is not a service-temperature promise.