Q235 Q345 St35.8 SA210A-1 SA213 Sch40 Hot Rolled Carbon Steel Boiler Seamless Steel Pipe

• Customization: Available
• Type: Seamless Steel Tube / Pipe
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Model NO.: Q235 Q345 St35.8 SA210A-1 SA213 Sch40
• Technique: Hot Rolled
• Shape: Round
• Surface Treatment: Black
• Special Use: Pipeline Transport, Boiler Pipe, Hydraulic/Automob
• Application: Fluid Pipe, Hydraulic Pipe, Structural Pipe
• Invoicing: by Actual Weight
• Thickness: 4mm-150mm
• Length: 12m
• Tolerance: ±5%, ±1%
• Oiled or Non-Oiled: Non-Oiled
• Delivery Time: 7-20 Days
• Transport Package: Customized or Regular Shipping According to Custom
• Specification: OD 4-2420MM
• Trademark: MEIDE
• Origin: Shandong, China
• HS Code: 7304319000
• Production Capacity: 200000 Ton/Tons Per Month

Product Description

Product Description

ASTM 1320 GB 20Mn2	It has medium strength, small section size, low temperature impact toughness and good weldability. Cold deformation has high plasticity, good machinability, higher hardenability than corresponding carbon steel, and tends to overheat, decarburization sensitivity and temper brittleness during heat treatment.
ASTM 1330 GB 30Mn2	1330 is usually used after quenching and tempering treatment. It has high strength, good toughness, and excellent wear resistance. When manufacturing parts with small section size, it has good static strength and fatigue strength, good wire drawing, cold heading, and heat treatment process, medium cutting ability, and acceptable weldability. Generally, it is not required to make weldments. When welding is required, the parts should be preheated to more than 200 ° C, with high hardenability and small quenching deformation, However, it has overheating, decarburization sensitivity and temper brittleness.
ASTM 1335 GB 35Mn2	The carbon content is higher than 1330, so it has higher strength and better wear resistance, and the hardenability is also improved, but the plasticity is slightly decreased. During cold deformation, the plasticity is medium, the machinability is medium, the weldability is low, and there is white spot sensitivity, overheating tendency and temper brittleness tendency. Water cooling is easy to produce cracks, and it is generally used in quenched and tempered or normalized conditions.
ASTM 1340 GB 40Mn2	Medium carbon quenched and tempered manganese steel is superior to 1040 steel in strength, plasticity and wear resistance. It has good heat treatment process and machinability, and poor weldability. When the carbon content is below *, it needs to be preheated to 100-425 ºC before welding. It has temper brittleness, overheating sensitivity, and water cooling is easy to produce cracks. It is usually used in quenched and tempered state.
ASTM 1345 GB 45Mn2	Medium carbon quenched and tempered steel has high strength, wear resistance and hardenability. After quenched and tempered, it can obtain good comprehensive mechanical properties. It is suitable for oil cooling and high temperature tempering. It is often used in the quenched and tempered state, and can also be used in the normalized state if necessary. Its machinability is acceptable, but its weldability is poor, its plasticity is low during cold deformation, its heat treatment has a tendency of over-heat sensitivity and temper brittleness, and water cooling is easy to produce cracks.
GB 50Mn2 DIN 50Mn2	Medium carbon quenched and tempered high strength manganese steel has high strength, high elasticity and excellent wear resistance, as well as high hardenability, good machinability, low cold deformation plasticity, poor welding performance, overheating sensitivity, white spot sensitivity and temper brittleness. Water cooling is easy to produce cracks. Proper quenching and tempering treatment can obtain good comprehensive mechanical properties, which can be used after quenching and tempering, and can also be used after normalizing and tempering.
DIN 20MnV6 1.5217 GB 20MnV	Its strength, toughness and plasticity are better than 1320, its hardenability is also good, and its machinability is acceptable. After carburizing, it can be directly quenched without the need for second quenching to improve the core structure, and its weldability is good. However, during heat treatment, it has temper brittleness at 300-360%.

Chemical Composition (%)

Grades	C	Si	Mn	P	S	Cr	Mo	Cu	Ni
GCr15/52100	0.95-1.05	0.15-0.35	0.2-0.4	≤0.027	≤0.02	1.3-1.65	≤0.1	≤0.25	≤0.3
GCr15SiMn	0.95-1.05	0.45-0.75	0.95-1.25	≤0.025	≤0.025	1.4-1.65	≤0.1	≤0.25	≤0.3
100Cr6	0.95-1.05	0.15-0.35	0.25-0.45	≤0.025	≤0.025	1.4-1.65	≤0.08	≤0.25	≤0.3
440C	0.9-1.0	0.80	0.80	≤0.035	≤0.030	16-18	≤0.75	≤0.25	≤0.60
100CrMn6	1.05	0.75	1.25	0.025	0.025	1.65	0.1	0.25	0.3

Mechanical property

Quenching			Tempering
Heating Temperature/ºC	Cooling	Hardness/HRC	Heating Temperature/ºC	Cooling	Hardness/HRC
830-850	Oil	62-65	150-190	Air	58-62

Heat Treatment for ASTM 52100 Bearing Steel.
ASTM/AISI 52100 alloy bearing steel is heated at 816°C followed by quenching in oil. Before performing this process, it is
subjected to normalizing heat treatment at 872°C followed by slowly cooling in order to reduce the machining stress.
Hot Working
AISI 52100 bearing steels alloy can be hot worked at 205 to 538°C.
Cold Working
AISI 52100 bearing steel can be cold worked using conventional techniques in the annealed or normalized conditions.
Annealing
For spheroidize anneale, the following isothermal anneal is recommended:
* 1500ºF (815ºC) for 3 hours
* 1350ºF (735ºC) for 4 hours
* 1250ºF (675ºC) for 3 hours
* Slow cool to 1000ºF (540ºC) then air cool.
Quenching
AISI 52100 alloy bearing steel could be hardened by quenching in water from 801-829 degree or quench in oil from 816-842 degree.
Tempering
Temper to desired hardness as indicated by tempering curves after water or oil quench.

Product specification

Tolerances
Pipe types	Pipe sizes(mm)	Tolerances
Hot rolled	OD<50	±0.50mm
	OD≥50	±1%
	WT<4	±12.5%
	WT 4~20	+15%, -12.5%
	WT>20	±12.5%
Cold drawn	OD 6~10	±0.20mm
	OD 10~30	±0.40mm
	OD 30~50	±0.45
	OD>50	±1%
	WT≤1	±0.15mm
	WT 1~3	+15%, -10%
	WT >3	+12.5%, -10%

Packaging & Shipping

1. Bundle and pack.
2. Warning for inclined end or flat end or according to buyer's requirements.
3. Marking: According to customer requirements.
4. Apply varnish.
5. Plastic covers at both ends.

FAQ

Q1:who are we?
A:We are based in Shandong, China, start from 2022,sell to North America(60.00%),Western Europe(14.00%),South America(6.00%).
There are total about 11-50 people in our office.

Q2. how can we guarantee quality?
A:Always a pre-production sample before mass production;
Always final Inspection before shipment;

Q3.what can you buy from us?Which ports are accepted for delivery?
A:Copper,Aluminum,Mould steel, Seamless carbon steel,Precision steel pipe,The steel plate,Alloy steel,Titanium,Custom machine parts.It can be delivered from Qingdao, Tianjin, Shanghai, Guangzhou and other ports.

Q4.why should you buy from us not from other suppliers?
A:Shandong Meide Import and Export Co., Ltd. has 25 years of production experience. With advanced precision production equipment
and modern large warehouses, has a stockpile of 200,000 tons of goods, has a number of long-term stable cooperative customers.

Q5.what services can we provide?
A:Accepted Delivery Terms: FOB,CFR,CIF,EXW;
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,PayPal;
Language Spoken:English,Chinese

Q6.Can we get the some samples?Any charges?
A:Yes,you can get available samples in our stock.Free for real samples,but customers need to pay the freight cost.

Q7.How can we get your price ?
A:We need below information to quote for you:
1). Product Name
2). Standard
3). Material Grade (Chemical Composition)
4). Dimension
5). Quantity
6). The Drawing for Special Parts