S45C C45 1045 Carbon Steel Plate Sheet Flat Bar Block Round Material

• Customization: Available
• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Model NO.: C45
• Composition: Check Detailed Description
• Technique: hot rolled,forged
• Shape: Bar
• Surface Treatment: Black, Machined
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Tool Steel Bar
• Delivery Condition: Annealing, Pre hardened
• Heat Treatment: Spheroidizing Anneal or QT
• Tolerance: +/- 1%
• Stock: Abundant
• Transport Package: Nude Packing
• Specification: Diameter: 50-1300mm
• Trademark: Ningbo Ningshing
• Origin: China

Product Description

 

4145H 120 KSIasper

AISI 4145H 120 KSI Alloy Steel Bar for Drilling Collar, Drill Pipe, Square Kelly, Lifting Sub, Stabilizer

 

Product Description

Dimensions
Hot Rolled Round:dia.50-130 mm.
Forged Round: dia.100-1300 mm.

Delivery Condition
EAF+LF+VD, Hot Rolled or Forged, Machined, Q+T, UT 100% Passed.

 

Chemical Composition(%)

C	Si	Mn	P	S	Cr	Mo	Ni	Cu
0.42-0.49	0.15-0.35	0.80-1.15	≤ 0.020	≤ 0.025	0.75-1.20	0.15-0.45	≤ 0.25	≤ 0.30

 

Mechanical Properties

	Tensile Strength PSI (MPa)	Yield Strength PSI (MPa)	Elongation	Reduction of Area	Hardness
Min.	140000	120000	14%	45%	30 HRC (285 HB)
Max.	------	------	------	------	36 HRC (341 HB)

 

Characteristics

AISI / SAE 4145H grade is a low-alloy steel containing chromium and molybdenum as strengthening agents. The steel has good fatigue strength and impact toughness in low temperature, weldability and machinability.

 

Applications

This low-alloy steel is used in heat treated condition with 120 KSI minimum yield strength for oil and gas equipments of well drilling, wellhead, Christmas tree, etc.

 

Heat Treatment

 

Annealing

820 to 870°C (1508 to 1598°F)
Slow cooling in furnace after soaking to achieve a uniform structure.
This process improves machinability and relieves internal stresses.

Hardness after annealing: max. 207 HB

Normalizing

840 to 880°C (1544 to 1616°F)
Cooling in still air after heating.
Refines grain structure and improves mechanical properties.

Typical hardness after normalizing: 170 - 220 HB

Stress Relieving

550 to 650°C (1022 to 1202°F)
Slow cooling in furnace.
Used after machining or welding to reduce residual stresses.

Holding time: 1 - 2 hours after through heating
 

Hardening

820 to 860°C (1508 to 1580°F)
Water or oil quenching depending on section size.
Ensure uniform temperature before quenching.

Holding time: 20 - 40 minutes after temperature equalization

Obtainable hardness:
55 - 60 HRC (surface, depending on quenching conditions)
 

Tempering

550 to 680°C (1022 to 1256°F)
Reheat immediately after hardening.
Cooling in air after soaking.

Holding time:
1 hour for each 25 mm of section thickness, minimum 2 hours

Tempering is used to adjust hardness and improve toughness.

Typical tempered hardness range:
20 - 35 HRC (depending on tempering temperature)
 

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