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Model Number: hot rolled steel round bar -54
Key Specifications/Special Features:
Hot rolled alloy steel bar with Q+T/black/peeled 822H171.Specification : Dia:10-320mm Length : as your request .2.Chemical composition (%):Carbon: 0.14-0.19Silicon: 0.15-0.40Manganese: 0.40-0.60
Phosphorus: 0.035max
Sulphur: 0.035 max
Nickel: 1.40-1.70
Chromium: 1.50-1.80
3.Process: EAF + LF + VOD + forged + rolled + heat treatment (optional)
4.Surface finishes:
Black, peeled (K12), cold drawn, turned & polished (H10, H11), precision ground (H9, H8)
5.Test: ultrasonic test according to SEP 1921-84
6.Soft annealing
Heat to 650-700oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 229.
7.Intermediate annealing: 630-650°C.
8.Hardening
Carburising: 880-980°C.
Core hardening: 830-870°C, water.
Case hardening: 780-820°C, water.
9.Normalizing
Normalizing: 850-880°C, air.
10.Tempering
Tempering temperature: 150-200°C.
11.Soft annealed treated: max. 229 HB.
Treated for cold shearability: max. 255 HB.
Treated for strength: max. 229 HB.
Treated for ferite and pearlite structure and hardness range: 159-207 HB.
12.Certificate of quality: issued in English, in addition the normal terms, production process, the mechanical property yield strength, tensile strength, elongation and hardness, forged ratio, UT test result, grain size, heat treatment methods and the sample of is shown on the certificate of quality.
13.Marking: heat no. will be cold stamped and steel grade, diameter mm, length mm, and the manufacturer logo and weight kg is painted.
Phosphorus: 0.035max
Sulphur: 0.035 max
Nickel: 1.40-1.70
Chromium: 1.50-1.80
3.Process: EAF + LF + VOD + forged + rolled + heat treatment (optional)
4.Surface finishes:
Black, peeled (K12), cold drawn, turned & polished (H10, H11), precision ground (H9, H8)
5.Test: ultrasonic test according to SEP 1921-84
6.Soft annealing
Heat to 650-700oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 229.
7.Intermediate annealing: 630-650°C.
8.Hardening
Carburising: 880-980°C.
Core hardening: 830-870°C, water.
Case hardening: 780-820°C, water.
9.Normalizing
Normalizing: 850-880°C, air.
10.Tempering
Tempering temperature: 150-200°C.
11.Soft annealed treated: max. 229 HB.
Treated for cold shearability: max. 255 HB.
Treated for strength: max. 229 HB.
Treated for ferite and pearlite structure and hardness range: 159-207 HB.
12.Certificate of quality: issued in English, in addition the normal terms, production process, the mechanical property yield strength, tensile strength, elongation and hardness, forged ratio, UT test result, grain size, heat treatment methods and the sample of is shown on the certificate of quality.
13.Marking: heat no. will be cold stamped and steel grade, diameter mm, length mm, and the manufacturer logo and weight kg is painted.
Shipping Information:
- FOB Port: China (Mainland)
- Lead Time: 5 - 45 days
Main Export Markets:
- Asia
- Australasia
- Central/South America
- Eastern Europe
- Mid East/Africa
- North America