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45MnMoB High Tensile Strength Corrosion Resistant Precision Engineered Oil Well Drilling Pipe

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Jiangsu Hongbao Group Co., Ltd.

Province/State:jiangsu

Country/Region:china

Tel:86-512-58715276

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Ms.Angela View Contact Details

45MnMoB High Tensile Strength Corrosion Resistant Precision Engineered Oil Well Drilling Pipe

Brand Name	HONGBAO
Model Number	HG-OP
Certification	PED, ISO9001, DNV
Place of Origin	China
Minimum Order Quantity	1MT
Price	Negotiable
Payment Terms	L/C,T/T
Supply Ability	3000MT/Month
Delivery Time	Negotiable
Packaging Details	As required
Material	30CrMo（4130/34CrMo4）, 42CrMo（4140/42CrMo4）, 40Mn2, 45MnMoB, 30CrMnSiA, 4135, 1541
Standard	GB/T 9808, ASTM A519, DIN2391, EN10305-1,
OD Range	30-139.7mm
WT Range	3-19mm
Processing	Cold Rolling
Color	Black

Detailed Product Description

ASTM A519 Core Barrel Inner Tube & Outer Tube 45MnMoB Seamless Steel Oil Well Drilling Pipe With Tight Tolerances

45MnMoB Grade Drilling Pipe: The Hard-Core Solution for Extreme Conditions

Engineered specifically for ultra-deep wells, high-pressure reservoirs, and highly abrasive formations, the 45MnMoB-grade drilling pipe combines a high-manganese-molybdenum alloy composition with enhanced mechanical properties to deliver unmatched reliability in challenging drilling environments.

Core Advantages

Extreme Load-Bearing: Tensile strength ≥790 MPa, hardness up to 28-32 HRC (after quenching & tempering), ensuring reliable performance in ultra-deep wells (>3,000m) and high-pressure formations (≥50 MPa).
Wear & Corrosion Resistance: High manganese (1.05-1.35%) and molybdenum (0.20-0.25%) content enhance abrasion resistance, while a refined microstructure improves fracture toughness for extended service life in harsh conditions.
Balanced Toughness: Elongation ≥14% balances strength and ductility, effectively absorbing sudden impacts (e.g., stuck pipe, vibration) to prevent brittle failure.
Specialized Adaptability: Optimized for hard rock, high-sand content, and complex formations. Optional quenching & tempering (QT) treatment further increases surface hardness (up to 32 HRC) for enhanced durability.

Why Choose 45MnMoB?

Tougher and more wear-resistant than conventional carbon steels (e.g., 1541), yet more cost-targeted than 4130/4140—designed specifically for high-demand drilling scenarios.

Mn-Mo alloy formula + precision engineering ensures high-temperature stability and fatigue resistance, meeting modern deep-well requirements.

Applications

Applications include fore poling (advance support), mine blasting, water well drilling, geothermal well drilling, and coal/nonferrous metal mining.

Chemical Composition

Steel Grade	C	Si	Mn	P	S	Cr	Mo	B
4130	0.28-0.33	0.15-0.35	0.40-0.60	≤0.040	≤0.040	0.80-1.10	0.15-0.25
4140	0.38-0.43	0.15-0.35	0.75-1.00	≤0.040	≤0.040	0.80-1.10	0.15-0.25
45MnMoB	0.43-0.48	0.17-0.37	1.05-1.35	≤0.020	≤0.015		0.20-0.25	0.001-0.005
1541	0.36-0.44	-	1.35-1.65	≤0.040	≤0.050
30CrMnSiA	0.28-0.34	0.90-1.20	0.80-1.10	≤0.020	≤0.015	0.80-1.10

Mechanical Properties

Steel Grade	Deliver Condition	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HRC)
4130	+ SR	≥813	≥690	≥15%	≥24
4140	QT	≥950	≥850	≥14%	28 - 33
45MnMoB	+ N	≥790	≥600	≥14%	-
1541	+ SR	≥813	≥690	≥15%	≥24
30CrMnSiA	QT	≥850	≥750	≥14%	26 - 31

Delivery Condition

Stress Relief Annealing after Cold Working (+SR) (BKS)
Normalizing (+N) (NBK)
Quenching & Tempering (QT)

Frequently Asked Questions

1. Can you provide a sample to check the quality?

We can provide free sample with same or similar sizes for you to check tube quality. You need to in charge of Express costs.

2. How about your production capacity?

3000 tons/Month.

3. What are your terms of payment?

30%TT in advance, Balance to be paid before shipment.

4. Where is your factory?

Zhangjiagang city, 1.5 hours away from Shanghai.

5. How can I get the quotation A.S.A.P?

Please send us an inquiry with full details as following, quotation will sent to you A.S.A.P:

Tube Standard
Steel Grade
Tube Size and Size Tolerance
Tube length
Quantity
If any special requirements

6. How about the minimum order quantity?

Normally for one size above 1 ton.

Welcome to contact us! Thanks.

Product Tags: ASTM A519 oil well drilling pipe 45MnMoB seamless steel tubing core barrel inner tube tight tolerance

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