ASTM A333 / A333M Grade 1

Chemical Properties

Element Grade 1
Carbon, max 0.30
Manganese 0.40–1.06A
Phosphorus, max 0.025
Sulfur, max 0.025
Note: A For each reduction of 0.01 % carbon below 0.30 %, an increase of 0.05 % manganese above 1.06 % would be permitted to a maximum of 1.35 % manganese.

Mechanical Properties

Tensile strength, min, psi [MPa] Yield strength, min, psi [MPa] Elongation in 2 in. or 50 mm
Basic minimum elongation proportionally
smaller size test
For longitudinal strips tests
Longitudinal Transverse Longitudinal Transverse Longitudinal Transverse
psi MPa psi MPa psi MPa
psi 55 000 30 [205] 35 25 28 20 1.75B
MPa 30 000 205
Note: A Elongation of Grade 11 is for all walls and small sizes tested in full section.
B The calculated minimum values.

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