Complete Specifications ASTM 9260 9255 GB 27simn 55si2mn 56sicr7 JIS Sup6 DIN 55si7 Carbon Steel Pipe Spring Steel Pipe/ Tube

• Type: Seamless
• Technique: Hot Rolled
• Material: Carbon Steel
• Surface Treatment: Black
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Model NO.: 9260 9255 GB 27SiMn 55Si2Mn 56SiCr7 JIS SUP6 DIN 5
• Invoicing: by Actual Weight
• Thickness: 4mm-150mm
• Length: 12m
• Tolerance: ±5%, ±1%
• Oiled or Non-Oiled: Non-Oiled
• Delivery Time: 7-20 Days
• Product Name: Seamless Alloy Steel Tube/Pipe
• 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

9260 spring steel is a widely used silicon manganese spring steel with slightly higher strength, elasticity, and quenching properties than 9255. Silicon manganese can improve Elastic Limit and yield strength ratio, quenching, tempering stability and relaxation stability. Its overheating sensitivity is lower than that of manganese steel, and its overall performance is better than that of various carbon spring steels. 9260 is widely used in the vehicle and tractor industries to produce plate springs and coil springs with heavy loads, high stresses, and large diameters.

Chemical Composition (%)

Material	C	Si	Mn	P	S	Cr	Ni	CU
27MnSi5	0.24-0.32	1.10-1.40	1.10-1.40	0.035	0.035	0.30	0.30	0.30
37MnSi5	0.32-0.4	1.10-1.40	1.10-1.40	0.035	0.035	0.30	0.30	0.30
46MnSi4	0.39-0.45	1.10-1.40	1.10-1.40	0.035	0.035	0.30	0.30	0.30
9260	0.56-0.64	1.8-2.2	0.75-1	0.035	0.04	0.2	0.25	0.35
9255	0.51-0.59	1.8-2.2	0.7-0.95	0.035	0.04	0.2	0.25	0.35

Mechanical property

Material	Diameter of sample d mm	Heat treatment or condition.	Tensile strength σb Mpa	Point of yield σs Mpa	Ratio of elongation δ %	Reduction of section ψ %	hardness HBW	Shock absorption energy KV2 J
27MnSi5	d=25	Quenching + tempering	≥980	≥835	≥12	≥40	≤217	≥39
37MnSi5	d=25	Quenching + tempering	≥885	≥735	≥15	≥45	≤229	≥47
46MnSi4	d=25	Quenching + tempering	≥885	≥735	≥15	≥40	≤229	≥47
Material	Sample size	Tensile strength σb (MPa)	Yield strength σs (MPa)	Elongation δ10 (%)	Hot rolled	Shrinkage of section ψ (%)	Cold drawing + heat treatment
9255	15mm	≥1274(130)	≥1176(120)	≥6	≤302HB	≥30	≤321HB
9260	15mm	≥1274(130)	≥1176(120)	≥5	≤321HB	≥25	≤321HB

Heat Treatment

9260 spring steel is widely used in the industrial production of automobiles, railway vehicles, and tractors. Mm spiral spring, cylinder safety valve spring, lifting hook spring, check valve spring, also suitable for production temperature of 250 ºC heat-resistant spring in the following non corrosive media, as well as large and important rolling springs and automotive shock absorption systems. They withstand alternating loads and work under high stress.
Spring steel heat treatment process 9260:
Spheroidizing annealing: Using 850 ° C heating, oil cooling quenching, short time isothermal spheroidizing process Min, quenching to 680 ° C for 1 hour, furnace cooling to 500 ° C), ideal spheroidizing structure can be obtained.
Spring steel heat treatment process 9260:
Spheroidizing annealing: Using 850 ° C heating, oil cooling quenching, short time isothermal spheroidizing process Min, quenching to 680 ° C for 1 hour, furnace cooling to 500 ° C), ideal spheroidizing structure can be obtained. The normal quenching temperature of 9260 steel is 850 ° C to 870 ° C, oil cooled. For example, the tempering temperature depends on the hardness requirements of the mold parts
Tempering 400 degrees, hardness 46 degrees HRC;
Tempering 500 degrees, hardness 40 degrees HRC;
Tempering 600 degrees, hardness 34 degrees HRC.
It is best to match the tempering performance of 150~160 degrees, and pay attention to avoiding the tempering brittleness zone of around 300 degrees. The tempering temperature can be increased to around 250 degrees, with a hardness of 55-60 degrees HRC and good toughness.
AC1-755, Ac3=810, Ar1=700, Ar3=770, Ms-300-305,
Annealing; 750C furnace cooling - HBS ≤ 222
Normalization; 830-860C-air-cooled HBS ≤ 302
Quenching; 870C Oil HRC>61
Hardness values at different temperatures after tempering HRC: 150 ºC -61200 ºC -60300 ºC -56400 ºC -51500 ºC -43550 ºC -38600 ºC -33650 ºC -29
The commonly used tempering temperature is 430~480C, water or air, HRC45~50
The following are the parameters for heat treatment of automotive leaf springs
Quenching holding time is related to thickness: mm/min, 6.5/2, 8/3, 8.5-10/4, 12/5
The tempering insulation time is related to the thickness: mm/min, 10/25-30, 10-15/30-35, 15-20/40-45, 20-25/45-50.
Spring steel heat treatment specification 9260:
9260 heat treatment method: It has processes such as isothermal tempering, graded quenching, sub temperature quenching, high-temperature tempering, and deformation heat treatment.
Spring steel heat treatment specification 9260:
9260 heat treatment method: It has processes such as isothermal tempering, graded quenching, sub temperature quenching, high-temperature tempering, and deformation heat treatment. This method can effectively improve the toughness and service life of 9260 spring steel.
Quenched at 870 ºC± 20 ºC, oil cooled; Temper at 480 ºC± 50 ºC (± 30 ºC for special needs).
Metallographic structure: tempered troostite.

Product specification

DN	OD		ASTM A53 / API 5L / ASTM A795			BS1387 / EN10255
			SCH10S	STD SCH40	SCH80	Light	Medium	Heavy
	MM	INCH	MM	MM	MM	MM	MM	MM
15	21.3	1/2"	2.11	2.77	3.73	2	2.6	-
20	26.7	3/4"	2.11	2.87	3.91	2.3	2.6	3.2
25	33.4	1"	2.77	3.38	4.55	2.6	3.2	4
32	42.2	1-1/4"	2.77	3.56	4.85	2.6	3.2	4
40	48.3	1-1/2"	2.77	3.68	5.08	2.9	3.2	4
50	60.3	2"	2.77	3.91	5.54	2.9	3.6	4.5
65	73 or 76	2-1/2"	3.05	5.16	7.01	3.2	3.6	4.5
80	88.9	3"	3.05	5.49	7.62	3.2	4	5
90	101.6	3-1/2"	3.05	5.74	8.08
100	114.3	4"	3.05	6.02	8.56	3.6	4.5	5.4
125	141.3	5"	3.4	6.55	9.53		5	5.4
150	168.3	6"	3.4	7.11	10.97		5	5.4
200	219.1	8"	3.76	8.18	12.7
250	273.1	10"	4.19	9.27	15.09

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