ASTM A350, Carbon and Low-Alloy for Piping

ASTM A350, Carbon and Low-Alloy for Piping
STEELMAX Steel Story

ASTM A350은 탄소강과 저합금강이면서
Fitting, Valve, Flange 용도의

저온 충격용 Notch 인성 (Toughness)을 중요시한
단조강 ASTM Spec입니다.

A350 은  ASTM 철강재의 Grade, Class 체계와는 다른,
독특한 LF1, LF2, LF3, LF4와 같은

LF 체계를 가지는 강재로 “LF”는 ASTM A350 Standard에
나오는 “Low-alloy steel Forged”의 약자를 의미합니다.

A350 Standard Specification for Carbon and Low-Alloy Steel
Forgings, Required Notch Toughness Testing Piping Components.

A350은 JIS G3205 저온 압력용기용 단강품
SFL : Steel Forging Low Temperature 과 비교 가능하며

JIS G3205 Standard specifies the carbon and alloy steel forgings
imparted a high weldability and to be used for the manufacture
of pressure vessels and other components
for low temperature service 규정입니다.

※ Steels for pressure vessels
Steel products manufactured pressure vessels and high pressure
equipment which require strength, weldability and principally
toughness at a ordinary temperature.
They are generally used for the principal portions of
pressure vessels.

압력 용기 및 고압 설비용으로서 고온 강도, 용접성 및 주로
상온에서의 인성을 중요시하여 제조 된 강재로
보통 압력 용기의 주요 부분에 사용됩니다.

※ Charpy V-Notch Impact Test (CVN)
Test to measure the absorbed energy, impact value, percentage
of brittle/ductile fracture, transition temperature, etc. with using
charpy impact testing machine in which test piece is supported by
two supports distant by 40 mm so that the notch meets the middle
between supports and is broken by striking with one blow of
pendulum to the face opposite the notch.

※ Toughness (인성 : 靭性)
The degree of difficulty in occurring impact breaking
because of the material’s toughness .
질기고 세며, 충격 파괴를 일으키기 어려운지, 어떤지의 정도.

ASTM A350, Carbon and Low-Alloy for Piping