描述

About ASTM A335 P11 Seamless Pipes

click to preview the related standard file: ASTM A335 A335M-21

Chromium and molybdenum are important elements of P11. Chromium, or chrome, improves high-temperature strength, increases oxidation resistance and raises the tensile, yield and hardness at room temperatures. Molybdenum increases the strength, elastic limit, resistance to wear, impact qualities and hardenability. It increases the resistance to softening, restrains grain growth and makes chromium steel less susceptible to embrittlement. Moly is also the most effective additive for increasing high temperature creep strength, or creep resistance. It also enhances the corrosion resistance of steel and inhibits pitting.

Enhanced properties of A335/SA335 P11

  • Toughness
  • Strength
  • Hardness
  • Wear resistance
  • Hardenability
  • Hot hardness
  • Corrosion resistance

Heat treating can be required to achieve some of these properties.

ASTM A335 P11 Specifications

A335 P11 alloy steel pipe Chemical Properties

P11MnMoPCSCrSi
0.30 – 0.600.44 – 0.650.025 max0.05 – 0.150.025 max1.00 – 1.500.50 – 1.00

A335 P11 alloy steel pipe Mechanical Strength

Yield Properties, MPaTensile Properties, MPaElongational
205 min415 min30 min

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