Otai 4340 steel material
4340. Material for heavy-machinery shafts, transmission parts, gears and crankshaft fasteners. Carbon composition: 0.370–0.430 %; Chromium composition: 0.700–0.900 %.
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Otai Special Steel
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Otai supplies tool, mould, alloy and carbon steels, with steel processing and export services.
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- https://otaisteel.com/Otai Special Steel · Source consulted 2026-10-27Published company information.
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Capabilities
- Tool and mould steel supply
- Alloy and carbon steel stock
- Steel processing and export services
Products
Otai 1020 steel material
1020. Material for automotive, tractor and general-machinery carburized parts, shafts and bushings. Carbon composition: 0.18–0.23 %; Silicon composition: 0.20–0.40 %.
View productOtai S235JR steel material
S235JR. Material for welded, bolted and riveted building, bridge and vehicle structures. Carbon composition: ≤0.20 %; Manganese composition: ≤1.40 %.
View productOtai GCr15 steel material
GCr15. Material for balls, rollers and shaft sleeves for rotating-machinery bearings. Carbon composition: 0.95–1.05 %; Chromium composition: 1.40–1.65 %.
View productOtai T15 steel material
T15. Material for reamers, form tools, milling cutters, end mills and taps. Carbon composition: 1.50–1.60 %; Chromium composition: 3.75–5.00 %.
View productOtai M35 steel material
M35. Material for twist drills, taps, milling cutters, reamers, broaches and saws. Carbon composition: 0.88–0.95 %; Chromium composition: 3.80–4.50 %.
View productSources and updates
Otai Special Steel official business profile
Original publication · Otai Special Steel
Source accessed: 27 October 2026
Content updated 27 October 2026. Source dates describe the documents or the recorded access to them.
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