STANDARD

GRADO

RESISTENZA ALLA TRAZIONE (MPA)

LIMITE DI SNERVAMENTO MINIMO (MPA)

ALLUNGAMENTO (%)

Longitudinale

Trasversale

ASTM A333

Grado 1

≥380

≥205

≥35

≥25

Grado 3

≥450

≥240

≥30

≥20

Grado 4

≥415

≥240

≥30

≥16.5

Grado 6

≥415

≥240

≥30

≥16.5

Grado 7

≥450

≥240

≥30

≥22

Grado 8

≥690

≥515

≥22

Grado 9

≥435

≥315

≥28

Grado 10

≥550

≥450

≥22

Grado 11

≥450

≥240

≥18

STANDARD

GRADO

COMPOSIZIONE CHIMICA

C

Si

Manganese

P

S

Cr

Ni

Cu

Mo

V

Al

ASTM A333

Grado 1

≤0.30

0.40∼1.06

≤0.025

≤0.025

Grado 3

≤0.19

0.18∼0.37

0.31∼0.64

≤0.025

≤0.025

3.18∼3.82

Grado 4

≤0.12

0.18∼0.37

0.50∼1.05

≤0.025

≤0.025

0.44∼1.01

0.47∼0.98

0.40∼0.75

0.04∼0.30

Grado 6

≤0.30

≥0.10

0.29∼1.06

≤0.025

≤0.025

Grado 7

≤0.19

0.13∼0.32

≤0.90

≤0.025

≤0.025

2.03∼2.57

Grado 8

≤0.13

0.13∼0.32

≤0.90

≤0.025

≤0.025

8.40∼9.60

Grado 9

≤0.20

0.40∼1.06

≤0.025

≤0.025

1.60∼2.24

0.75∼1.25

Grado 10

≤0.20

0.10∼0.35

1.15∼1.50

≤0.03

≤0.015

≤0.15

≤0.25

≤0.015

≤0.50

≤0.12

≤0.06

Grado 11

≤0.10

≤0.35

≤0.6

≤0.025

≤0.025

≤0.50

35.0∼37.0

≤0.50