Common questions, short and clear answers

We work in two main areas: iron and steel (hot-rolled, bright and forged steel; hexagon bar and seamless steel tube) and castings (grey iron, ductile iron, steel, stainless steel and abrasion-resistant Ni-Hard).

We supply nine steel groups: general structural (S235JR, S355JR / St52-3…), carbon (C10–C60), quenched and tempered (42CrMo4, 34CrNiMo6…), case-hardening (16MnCr5, 20MnCr5, 21NiCrMo2…), free-cutting (11SMn30, 11SMnPb30), cold-work tool (1.2379, 1.2080…), hot-work tool (1.2344, 1.2714…), plastic mould (1.2738, 1.2311, 1.2312) and high-speed steels (1.3343…). The full list with material numbers and SAE equivalents is on the Iron & Steel page.

We supply hot-rolled rounds in Ø 15–340 mm, squares in 10×10 – 300×300 mm, flats and slabs in 20×5 – 1500×300 mm and hexagons in 19–80 mm. Forged rounds go up to Ø 190–1200 mm, forged squares to 200×200 – 800×800 mm and forged flats to 200×100 – 1000×500 mm.

We supply cold-drawn rounds in Ø 5–85 mm, squares in 5×5 – 80×80 mm, flats in 20×5 – 200×50 mm and hexagons in 10–70 mm; peeled rounds in Ø 20–75 mm and ground rounds in Ø 16–140 mm.

Hexagon bar comes in SAE 1010 / DIN S235JR (St 37): 19–80 mm hot-rolled and 10–70 mm cold-drawn. Seamless steel tube comes in DIN C45, SAE 1010-1060 and DIN S235R (St37 / St44 / St52), from 21×3 mm to 755×100 mm (outside diameter × wall thickness).

We produce grey iron (lamellar graphite), ductile iron (spheroidal graphite), steel, stainless steel and abrasion-resistant (Ni-Hard) castings. Which type suits which application is explained on the Castings page and in our article on casting types.

The fastest way is WhatsApp: +90 539 304 88 06. You can also call +90 539 825 40 44, email info@olcaymetal.com.tr or fill in the form on our contact page.

Grade (e.g. C45, 42CrMo4), product form and size (round Ø, flat a × b…), length, quantity (pieces or tonnes) and delivery location. The clearer the information, the faster we can reply.

A technical drawing of the part (PDF, DWG, STEP) or details of a sample part; the casting type and grade/standard required; order quantity, how often it repeats and the approximate weight per part; and whether the part is delivered as-cast or machined.

Yes. You can also send requests for grades and sizes not shown on the site; our sales team will tell you whether we can supply them.

Mainly automotive, along with machine building, energy and defence. Our castings also go to the mining, metallurgy, agriculture, chemical and construction industries.

With our weight calculator you can see the weight per metre and the total tonnage for round, square, flat, hexagon, tube and plate instantly. For example, one metre of round bar weighs d² × 0.006165 kg (d in mm). We explain the calculation step by step in this article.

No. The tables and formulas are for information only. Please confirm grade, size and tolerance values with our sales team before ordering.

Case-hardening steels are low in carbon; their surface is carburised and hardened, giving a hard surface over a tough core (gears, pins). Quenched and tempered steels have medium carbon; hardening and tempering gives them high strength and toughness throughout the section (axles, crankshafts, shafts). A detailed comparison is in this article.

Yes. You can download the PDF catalogue here, with our product groups, size ranges, grade lists and technical tables (in Turkish).

Our headquarters are at İkitelli OSB Mah. Demirciler Sanayi Sitesi, E2 Blok No:376-377, 34490 Başakşehir/İstanbul, Türkiye. See our contact page for directions.

Olcay Metal has been in business since 1991, with a quality philosophy built on R&D-driven production. Read our story on the About Us page.