SAE4130/JIS Scm420/25crmo4/30CrMo/1.7218 Low Black Carbon Bright Steel Round Bar Carbon Welding Rod/Bar

• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Alloy Steel
• Technique: Hot Rolled
• Shape: Bar
• Surface Treatment: Bright, Chrome Plated
• Model NO.: SAE4130/JIS SCM420/25CrMo4/30CrMo/1.7218
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Wear-Resistant Steel, Cold Heading Steel, Free-Cut
• Transport Package: Standard Seaworthy Export Packaging or as Required
• Specification: 3000-9000mm
• Trademark: meide
• Origin: Shandong, China
• HS Code: 7215500000
• Production Capacity: 1000 Ton/Month

Product Description

About products

Round steel with a bright surface and no rolling defects and decarburization layer on the surface. It can be subdivided into peeled, polished, and polished materials. Silver bright steel is used as machine structural steel for various specialized purposes, such as for bolts with strong wear. In addition, such as spindles, piston rods, spokes, and similar components can be used as tool steel in the quenched state.

chemical composition

composition	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
16Mn	0.13-0.2	0.2-0.6	1.2-1.6	≤0.025	≤0.01	≤0.3	≤0.3	≤0.2
20Cr/5120	0.18-0.24	0.17-0.37	0.5-0.8	≤0.035	≤0.035	0.7-1	≤0.3	≤0.3	≤0.15
40Cr	0.37-0.44	0.17-0.37	0.5-0.8	≤0.035	≤0.035	0.8-1.1	≤0.3	≤0.3	≤0.15
15CrMo	0.12-0.18	0.17-0.37	0.4-0.7	≤0.035	≤0.035	0.8-1.1	≤0.3	≤0.3	0.4-0.55
20CrMo	0.17-0.24	0.17-0.37	0.4-0.7	≤0.035	≤0.035	0.8-1.1	≤0.3	≤0.3	0.15-0 .25
30CrMo	0.26-0.34	0.17-0.37	0.4-0.7	≤0.035	≤0.035	0.8-1.1	≤0.3	≤0.3	0.15-0.25
35CrMo	0.32-0.4	0.17-0.37	0.4-0.7	≤0.035	≤0.035	0.8-1.1	≤0.3	≤0.3	0.15-0.25
42CrMo/4140	0.38-0.45	0.17-0.37	0.5-0.8	≤0.035	≤0.035	0.9-1.2	≤0.3	≤0.3	0.15-0.25
5120	0.17-0.22	0.15-0.35	0.7-0.9	≤0.035	≤0.035	0.7-0.9	≤0.25	≤0.35	≤0.06
20Mn2/20MN6/SMn420/1320	0.17-0.24	0.17-0.37	1.4-1.8	≤0.03	≤0.03	≤0.3	≤0.3	≤0.3	≤0.1
SMnC420	0.17-0.23	0.15-0.35	1.2-1.5	≤0.03	≤0.03	0.35-0.7	≤0.25	≤0.3	0-
4130/25CrMo4/SCM420	0.28-0.33	0.15-0.35	0.4-0.6	≤0.035	≤0.04	0.8-1.1	≤0.25	≤0.35	0.15-0.25
35Cr/5132	0.32-0.39	0.17-0.37	0.5-0.8	≤0.035	≤0.035	0.8-1.1	≤0.3	≤0.3	≤0.15
4140/SCM440/42CrMo	0.38-0.43	0.15-0.35	0.75-1	≤0.035	≤0.04	0.8-1.1	≤0.25	≤0.35	0.15-0.25
55CrMn/SUP9	0.52-0.6	0.17-0.37	0.65-0.95	≤0.025	≤0.02	0.65-0.95	≤0.35	≤0.25	-

Product Description

Commodity	Bright round steel/chrome plated rod
Grades	Carbon steel	SAE 1018 , A36, SS400, S235JR, Q235, SAE 1020, S20C , 1.0402, 20GB, CK22,  SAE 1045 ,S45C, C45, CK45, EN8 ,1.1191
	Alloy steel	SAE 5120 , 20Cr, Scr 420H, 20Cr4, SAE 5140 , 40Cr,SCr440, 520M40,  SAE 4130 , 30CrMo, SCM430, SCM420, SAE 4140 , 42CrMo4, EN19, SCM440,  708A42, 708M40, SAE 4340, 40CrNiMoA,871M40 , SNCM439
Length	4-12m random length or as per request fixed length
Surface	Bright, or chromate treatment  as per required
Packing	Wrapped by plastic clothes and steel strips
Delivery Condition	BK, BKW, GBK, NBK
Container Size	20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High)
Application	hardware tools, auto parts, standard parts, fasteners common shaft, machinery manufacturing, light industry, hardware, bicycles, cars, motorcycles, textile machinery, transformers and other machinery industry.
Advantages	greater size accuracy, straightness and increased tensile and yield strength as well as improved machinability
MOQ	1 tons

Mechanical properties

Broadcast
Tensile strength σ B (MPa): ≥ 930 (95) yield strength σ s (MPa):≥785(80)
Elongation δ 5 (%):≥12
Reduction of area ψ  (%):≥50
Impact energy Akv (J): ≥ 63
Impact toughness value α kv (J/cm2):≥78(8)
Hardness: ≤ 229HB
Sample size: sample blank size is 25mm
Heat treatment specification: quenching at 880 ºC, water cooling, oil cooling; Temper 540 ºC, water cooled, oil cooled.

This type of steel is usually used in the quenched and tempered state, and when the carbon content is at the lower limit, it can also be used as carburized steel that requires higher core strength. In the medium-sized machinery manufacturing industry, it is mainly used to manufacture quenched and tempered parts with large cross sections and working under high stress conditions, such as shafts, spindles, and control wheels, bolts, stud bolts, gears, etc. that are subject to high loads; In the chemical industry, it is used to manufacture welded parts, welded structures composed of plates and pipes, and high-pressure conduits that operate in a medium containing nitrogen and hydrogen at a temperature not exceeding 250 ºC; In the steam turbine and boiler manufacturing industry, it is used to manufacture fasteners working below 450 ºC, flanges and flange covers subject to high pressure below 500 ºC.

Application

Chromium plated rod is not only suitable for supporting the use of linear bearings in the automation industry, but also can be applied to many types of guide rods, operating rods, adjusting rods, transmission shafts, pillars, cylinders, cylinders, die-casting machines, injection molding machines, fitness equipment, electronic equipment, electric tools, precision machinery, packaging machinery, printing machinery, woodworking machinery, textile machinery, printing and dyeing machinery, light industry machinery, engineering machinery, mining machinery Automation equipment and other various industrial machinery as well as supporting equipment.

Packaging	1. by bundles, each bundle weight under 3 tons, for small outer diameter steel bars, each bundle with 4 - 8 steel strips. 2. after making by bundle, covered with Polyethylene waterproof cloth. 3. make black paints painting on each bar, then make bundles
20 feet container contains dimension	Length under 6000mm
40 feet container contains dimension	Length under 12000mm
By bulk vessel	Freight charge is low by bulk cargo, and large heavy sizes can not be loaded into containers can shipping by bulk cargo

FAQ

1. Who are we?
Our headquarter is located in Shandong, China. Since 2022, we have sold to North America (60.00%), Western Europe (14.00%) and South America (6.00%). There are about 11-50 people in our office.

2. How do we guarantee quality?
Always provide pre-production samples before mass production;
Always carry out final inspection before shipment;

3. What can you buy from us?
Copper, aluminum, die steel, titanium, customized machine parts
4. Why should you buy from us instead of other suppliers?
The company has 25 years of production experience. It has advanced precision production equipment, modern large warehouse, 200000 tons of inventory goods and a number of long-term stable cooperative customers.

5. What services can we provide?
Accepted delivery conditions: FOB, CFR, CIF, EXW
Accepted payment currency: US dollar, Euro, Japanese yen, Canadian dollar, Australian dollar, Hong Kong dollar, British pound, RMB, Swiss franc;
Accepted payment type: T/T, L/C, D/P D/A, PayPal;
Optional ports: Tianjin, Shanghai, Guangzhou;
Spoken: English, Chinese

6. How can we get your price?
A. We need the following information to quote for you:
1).  Product Name
2).  standard
3).  Material grade (chemical composition)
4).  dimension
5).  amount
6).  Special part drawin