NBR M - Nitrile butadiene rubber – medium ACN

Clwyd reference NBR M
ASTM classification NBR M

This can be based on low, medium or high acrylonitrile content, the higher the acrylonitrile content the better the oil and chemical resistance but poorer the low temperature properties.

Typical applications
  • Aeronautical (good heat resistance, up to around 110 C)
  • Oil resistant seals and diaphragms
  • Non-latex gloves
  • Rollers
  • Excellent resistance to oil
  • Good resilience
  • Physical and chemical properties dependent on the ACN content; the higher the ACN content the better the resistance but the lower the flexibility
  • Inferior to NR in terms of physical strength and flexibility
  • Can be attached by ozone, aromatic hydrocarbons, ketones, esters and aldehydes.
Available hardness range (Shore A) 40 - 95
Upper continuous service temp. 150°C
Min. temp. for sealing applications -30°C
Minimum non-brittle  temp.  -50°C
Tensile strength (up to) 26 MPa
Elongation at break (up to) 450%
Price Bracket Very low
ASTM 1 Oil Excellent
ASTM 2 Oil Excellent
ASTM 3 Oil Excellent
Kerosene Excellent
Liquid B Good
Liquid 101 Good
Phosphate ester None
Ketone None
Toluene None
Iso-octane Good
Methanol Good
Acid (weak) Average
Acid (strong) None
Base (weak) Average
Base (strong) None
Hydrogen sulphide None
Steam None
Ozone Average
Radiation Average