Product Categories

Zhejiang Zhengfeng Valve Co.,Ltd
Tel: 86-577-67388156
Fax: 86-577-67318585
Email: sales@zfvalve.com
Contact person: DAVID
Add: Hengtong Road, Wuxing Industrial Park, Wenzhou, Zhejiang, China. 325105

Home > News > Content
Duplex Stainless Steell ASTM A890 4A Valve - ZFV
- Jan 06, 2018 -

Beside normal material valve such as canbon steel A216 WCB, austenic stainless steel such as A351 CF8M, A351 CF8, ZFV also have duplex stainless steel valve to meet differents requirement from customers. General duplex grade ASTM A890 4A for casting material, ASTM A182 F51 for forged material. Duplex SS valve is more anti-corrosive than austenic SS valve, have better mechanical performance, but is normally not applied in high temperature as austenic SS. 


Chemical composition and mechanical properties of ASTM A890 4A as below.

Chemical composition:

C: ≤ 0.03

Mn: ≤ 1.5

P: ≤ 0.04

Si: ≤ 0.03

S: ≤ 0.02

Cr: 21-23.5

Ni: 4.5-6.5

Mo: 2.5-3.5

Cu: ≤ 1.0

N: 0.1-0.3

Mechanical properties:

Tensile strength: ≥ 620Mpa

Yield strength: ≥ 415Mpa

Elongation ≥ 25


ZFV Zhejiang Zhengfeng Valve Co., Ltd  is professional butterfly valve manufacturer, main products include triple offset butterfly valve laminated seal type, triple offset butterfly valve soft seal type.The valve main materials include ASTM A351 CF8, CF8M, CF3, CF3M, ASTM A105, ASTM A216 WCB, Halalloy steel, ASTM A352 LCB, A890 4A, Monelpurenic,titanium alloy,20 alloy steel etc..


Zhejiang Zhengfeng Valve