Carbon Steel, Alloy Steel, Stainless Steel, and Nickel Base Alloy Castings
5 product categories (source: API Composite List)
Castings, forgings & bolting suppliers (API 20 series)
Castings, open die and closed die forgings, and alloy, carbon steel and corrosion-resistant bolting for petroleum and natural gas equipment.
- API standards
- API-20A, API-20B, API-20C, API-20E, API-20F
- Product categories
- 25
Standards and suppliers
Open Die Shaped Forgings
5 product categories (source: API Composite List)
Closed Die Forgings for Use in the Petroleum and Natural Gas Industry
4 product categories (source: API Composite List)
Alloy and Carbon Steel Bolting
5 product categories (source: API Composite List)
Corrosion Resistant Bolting
6 product categories (source: API Composite List)
Product categories
Group A: Carbon Steels
Group B: Low Alloy Steels
Group C: Stainless Steels Other Than Duplex
Group D: Duplex Stainless Steels
Group E: Nickel Base Alloys (CRA)
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 Steels
Group 5: Nickel Based Alloys
Group 1: Carbon and low-alloy carbon steels
Group 2: Austenitic, martensitic, and PH martensitic stainless steels
Group 3: Corrosion-resistant alloys
Group 4: Duplex stainless steel
Cold Formed Bolts, Screws, and Nuts
Studs
Machined Bolts, Screws and Nuts
Hot Formed Bolts and Screws
Hot Formed Nuts
Machined Studs
Machined Bolts, Screws, and Nuts
Cold Formed Bolts, Screws, and Nuts
Hot Formed Bolts and Screws
Roll Threaded Studs, Bolts, and Screws
Hot Formed Nuts
Frequently asked questions
Are the alloy / bolting / forgings suppliers listed here certified by OFMP?
No. OFMP is not API and does not certify, audit or endorse suppliers. Supplier profiles organize API certificate records that the source marks Active; confirm the certificate number, product scope and current status on the API Composite List before purchasing.
How do I check a supplier's API certificate?
Search the API Composite List by certificate number or company name and check that the status, facility address and product scope match the quotation. Read the guide
How do I contact a supplier?
Open a supplier profile. Active members can view the contact details a supplier has provided.
Standard and product names come from the API Composite List search snapshot (2026-10-10). Family groupings and Chinese reading aids are OFMP editorial additions, not official API classifications or translations. OFMP is not affiliated with API.
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