Group 4: Duplex and Superduplex Stainless Steels

Standard: API-20B
Product use: Materials & connections

This is a product category. Confirm models, specifications, availability and lead times with suppliers.

Related supplier profiles · 20

Supplier profiles are selected by certificate product scope and standard. Certificate records are marked Active by the source; confirm current certificate status, product suitability and supply capability before purchasing.

Anhui Kefeng Alloy Co., Ltd.

Xuancheng · Anhui · People's Republic of China

Group 3: Austenitic, Martensitic and Martensitic Precipitation Hardening Stainless Steels; Group 4: Duplex and Superduplex Stainless Steels; Group 5: Nickel Based Alloys

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Envil Equipment Manufacturing (Jiangsu) Co., Ltd

Zhengjiang CIty · Jiangshu Province · People's Republic of China

Group 1: Carbon and Microalloyed Steels; Group 2: Low Alloy Steels; Group 3: Austenitic, Martensitic and Martensitic Precipitation Hardening Stainless Steels; Group 4: Duplex and Superduplex Stainless…

Certificate dates need review

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Fujian Shengfa Machine Manufacturing Co., Ltd.

Fuding · Fujian · People's Republic of China

Group 1: Carbon and Microalloyed Steels; Group 3: Austenitic, Martensitic and Martensitic Precipitation Hardening Stainless Steels; Group 4: Duplex and Superduplex Stainless Steels

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JiangSu Fujie Advanced Mechanical Technology Group. Co., Ltd DBA Badu Forging and Machinery Co., Ltd

Wujiang District Suzhou · Jiangsu · People's Republic of China

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Jiangsu Jinhe Special Alloy Material Manufacture Co., Ltd.

Wuxi · Jiangsu · People's Republic of China

Group 3: Austenitic, Martensitic and Martensitic Precipitation Hardening Stainless Steels; Group 4: Duplex and Superduplex Stainless Steels; Group 5: Nickel Based Alloys

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Jiangsu New Zhongzhou Special Alloy Materials Co., Ltd.

Dongtai · Jiangsu · People's Republic of China

Group 5: Nickel Based Alloys; Group 4: Duplex and Superduplex Stainless Steels; Group 3: Austenitic, Martensitic and Martensitic Precipitation Hardening Stainless Steels

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Product use and sources

Castings, forgings and fasteners form the physical foundation of reliable equipment.

Standard description (API source text):

Open Die Shaped Forgings

Names and standard mappings come from the API Composite List search snapshot. Product-use groups and Chinese reading aids are OFMP editorial additions, not official API classifications or translations; original English names are retained for comparison. Category snapshot: 2026-10-10

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