ASTM 588.pdf

ASTM A588-04 High-Strength Low-alloy Structural Structural Steel with 50ksi Minimum Yie ld Point Chemical Composition %

Tensile Test

Grade C

Si

Mn

Grade A

0.19 max

0.30

0.80

0.65

1.25

0.40

Grade B

0.20 max

0.15

0.75

0.20

   ～

   ～

P

S

0.25

   ～

1.35 0.80

Cr

Mo

0.01

0.40

0.50 0.40    ～ max 0.70

0.20

0.25 0.30

0.10 －

0.15 max

0.15 0.40

1.35

0.50

0.50 0.50

Grade K

0.17 max

0.25

0.50

0.30

0.40 0.40 0.10    ～ max 0.70 max

   ～

0.50

   ～

   ～

1.20

   ～

   ～

0.50

   ～

Nb

Elongation Tensile strength Test piece % ksi (N/mm²) in(mm) min

   ～

Grade C

   ～

V 0.02

   ～

0.04 0.05 max max

Ni

0.40 0.40    ～ max 0.65

   ～

   ～

0.50

Cu Cu

Yield point ksi(N/mm²)

   ～

   ～

－

0.10

50 (345) min

0.01

70 (485) min

GL=8(200) 18 GL=2(50) 21

   ～

0.10

0.005 －

   ～

0.05

Remarks：1.For each reduction of 0.01% below the specified maximum for carbon, an increase of 0.06% above the specified maximum for manganese is permitted, up to a maximum of 1.50% 2.Gr.K for plates under 1/2 in.(12.70mm) in thickness, the minimum columbium is waived. 3.For plates wider than 24 in.(600mm), the elongation requirement is reduced two percentage points. 4.When the thickness less than 5/16 in(8mm), See Specification A6/A6M for elongation adjustment.