A 381 Class Y70 (United States / ASTM) Material Properties

Material group: Ferrous Alloys / Structural and constructional steels
Country/Standard: United States / ASTM

Data updates

Latest Update: 2019-04
Total number of updates: 1
Update History:

Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 485 MPa view details
Tensile Strength 565 MPa view details
Elongation, A 18 % view details
Yield Strength, Rp0.2 70.3 ksi view details
Tensile Strength 81.9 ksi view details
Elongation, A 18 % view details

Physical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Modulus of Elasticity 190 — 210 GPa view details
Density 7.67 — 7.86 kg/dm³ view details
Poisson Coefficient 0.27 — 0.3 view details
Modulus of Elasticity 27.6 E+03 — 30.5 E+03 ksi view details
Density 0.277 — 0.284 lb/in³ view details
Poisson Coefficient 0.27 — 0.3 view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 0.30
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Mn
VALUE
≤ 1.50
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
P
VALUE
≤ 0.030
UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
S
VALUE
val1
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UNIT
%
CAS NUMBER
7704-34-9

A381/A381M: 2023 / Standard Specification for Metal-Arc-Welded Carbon or High-Strength Low-Alloy Steel Pipe for Use With High-Pressure Transmission Systems

Heat Treatments

  • All pipe, after welding, shall be heat treated at a temperature of 595°C (1100°F) or higher.<br>When specified in the order, all pipe after welding shall be heated at 899 - 954°C (1650 - 1750°F) and air cooled or water quenched and tempered.