题目内容

With carbon equivalent ( ), the steel has a low tendency to harden and cold cracking?

A. less than 0.40%
B. less than 0.50%
C. less than 0.60%
D. less than 0.80%

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( ) is not a factor that affects weldability.

A. chemical composition
B. Welding process
C. joint type
D. operation skill

The calculation formula of carbon equivalent of the IWS considers the influence of () on weldability.

A. diffusion hydrogen
B. welding process
C. welding structure
D. chemical composition

Maximum crack distance has been used to allow more accurate determination of the cracking ( ) range.

A. size
B. temperature
C. toughness
D. strength

Hot ductility tests simply measure the () strength and ductility.

A. room
B. elevated
C. all temperature