OEM High Quality 22mm 4130 Scm430 Scm420 25crmo4 1.7218 30CrMo Alloy Optical Axis/ Bright 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.: 4130 SCM430 SCM420 25CrMo4 1.7218 30CrMo
• 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

Material	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
ASTM 5115	0.18	0.37	0.7	0.035	0.035	1	0.3	0.3	0.15
ASTM 5120	0.24	0.37	0.8	0.035	0.035	1	0.3	0.3	0.15
ASTM 5130	0.34	0.37	0.8	0.035	0.035	1.1	0.3	0.3	0.15
ASTM 5140	0.44	0.37	0.8	0.035	0.035	1.1	0.3	0.3	0.15
ASTM 5145	0.49	0.37	0.8	0.035	0.035	1.1	0.3	0.3	0.15
ASTM 4119	0.15	0.37	0.7	0.035	0.035	0.7	0.3	0.3	0.55
ASTM 4130	0.34	0.37	0.7	0.035	0.035	1.1	0.3	0.3	0.25
ASTM 1335	0.38	0.35	1.9	0.035	0.04	0.2	0.25	0.35	0.06
ASTM 4317	0.4	0.37	0.7	0.035	0.035	1.1	0.3	0.3	0.25
ASTM 4140	0.45	0.37	0.8	0.035	0.035	1.2	0.3	0.3	0.25
GB38CrMoAI/JIS SCM645	0.42	0.45	0.6	0.035	0.035	1.65	0.3	0.3	0.25
ASTM 6150	0.54	0.37	0.8	0.025	0.025	1.1	0.3	0.25	0.1
ASTM 4142	0.45	0.37	1.2	0.035	0.035	1.2	0.3	0.3	0.3

Product Description

Item	Hard Chromed Rod	Induction Hardened Chromed	Nickel and Chrome Plating Bars
Roundness	Diameter tolerance / 2	diameter tolerance / 2	diameter tolerance / 2
Standard Length	-for Ø ≤ 60 mm: 5600 -6200mm -for Ø≥60 mm: 5800 -7200mm  Upon request: special lengths on all diameters	- for Ø ≤ 60 mm: 5600 - 6200 mm - for Ø ≥ 60 mm: 5800 - 7200mm  Upon request: special lengths on all diameters	Up to 6000 mm  Upon request: special lengths on all diameters
Surface Roughness	Ra max. 0.20 µm  (statistic average: 0.05-0.15 µm)	Ra max. 0.20 µm  (statistic average: 0.05- 0.15 µm)	Ra max. 0.20 µm (statistic average: 0.05-0.15 µm)
Chrome Layer Thickness	min. 900 HV (0.1)	min. 900 HV (0.1)	min. 25 µm
Straightness	≤ Ø16 mm: max. 0.3 mm: 1000 mm > Ø16 mm: max. 0.2 mm: 1000 mm	≤ Ø16 mm: max. 0.3 mm: 1000 mm > Ø16 mm: max. 0.2 mm: 1000 mm	max.0.20 mm/1000 mm

mechanical behavior

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 880 ºC, water cooling, oil cooling; Temper 540 ºC, water cooling and oil cooling.

Features and applications

Compared with 30 steel, this steel has higher strength and hardenability. The critical quenching diameter in oil is 8~34 mm, and in water is 19~56 mm. The cold deformation plasticity and weldability of steel are medium, and the machinability of annealed or tempered steel is good.

This kind of steel is usually used in the quenched and tempered state, and can also be used after normalizing. It is used to manufacture important parts, such as shafts, small shafts, balance levers, rocker rods, connecting rods, bolts, nuts, gears and various rollers, that work under wear and friction conditions or under great impact loads. In addition, the steel can also be used as high-frequency surface hardening steel to make parts requiring high surface hardness and wear resistance

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