March 2023 - Page 3 of 3 -

High Carbon Steel Spring Wires

March 16, 2023 March 31, 2023

Wire

♦ STEEL WIRES ♦

Kromtel carbon steel wires are produced from finest wire rods. These wires are adequate for flattening use and will neither burst nor crack.

Carbon steel wires are mainly used for springs and mattresses, other than those mentioned it is also used for other woven applications; woven cage productions, CO2 welding wires, zig-zag spring wires, music wires and rope wires.

Our products comply with global standards and have quality certificates issued by institutions like ISO and TÜV.

♦ DIN 17223/84 NORM CARBON STEEL SPRING WIRE ♦

(A, B, C, D CLASS GALVANIZED AND PHOSPHATE COATED)

Kromtel’s carbon steel wires comply with the DIN 17223/84 standard and are coated with phosphate and galvanize. They can be acquired as A, B, C and D Class.

DIN 17223/84	Diameter (mm)	Chemical Analysis
DIN 17223/84	Diameter (mm)	C %	Si %	Mn %	P %	S %	Cu %
A Class	0.10-20	0.40	0.10	0.30	Max	Max	Max
A Class	0.10-20	0.85	0.35	1.00	0.04	0.04	0.20
B Class	0.10-20	0.55	0.10	0.30	Max	Max	Max
B Class	0.10-20	0.85	0.35	1.00	0.040	0.040	0.20
C Class	0.10-20	0.70	0.10	0.30	Max	Max	Max
C Class	0.10-20	1.00	0.35	1.50	0.030	0.030	0.12
D Class	0.10-20	0.70	0.10	0.30	Max	Max	Max
D Class	0.10-20	1.00	0.35	1.50	0.030	0.030	0.12

EN 10270-1 : 2001	Service Properties	Applications
SL	Tension, compression or torsion springs subjected to low static stress.	Magazine binding wires, hangers, staples.
SM	Tension, compression or torsion springs subjected to medium high static stresses or rarely to dynamic stresses.	Binding wires, springs, circlips.
DM	Tension, compression or torsion springs which are subjected to medium high dynamic stresses. Also for wire forms which require severe bending.	Circlips, wire rope, lock levers.
SH	Tension, compression or torsion springs which are subjected to high static stresses or slightly dynamic stresses.	Tyre cord reinforcement,
DH	Tension, compression or torsion springs or wire forms which are subjected to high static stresses or medium level dynamic stresses.	Helical springs, compression springs.

♦ STANDARDS ♦

DIN / ASTM / SAE	EURO	TS
DIN 17223/A	EN 10270-1-SL	TS2500-1-SL
DIN 17223/B	EN 10270-1-SM	TS2500-1-SM
DIN 17223/C	EN 10270-1-SH	TS2500-1-SH
DIN 17223/D	EN 10270-1-DH	TS2500-1-DM

SL : Low tensile static	SH : High tensile static
SM : Medium tensile static	DH : High tensile dynamic
DM : Medium tensile dynamic

Stainless Steel Cold Heading Wire

March 16, 2023 March 24, 2023

Wire

♦ Stainless Steel Wires for Nuts, Bolt Screws and Rivets ♦

Kromtel can supply stainless steel wires for rivets, nuts, and bolt screws at the requested sizes and qualities regarding your schedules.

Grades: 302HQ, 304, 304Cu, 304J3, 305J1, 316Cu, 316L, 410, 430, 430Cu, XM-7

Most important features of the Kromtel cold heading wire:

High Formability
Smooth surface
Proper surface coating

♦ Standards ♦

ASTM A439, JIS G4315, KS D3703, SAE J405

Stainless steel cold heading wires used for nuts, bolt screws and clinches are supplied by Kromtel for the automobile industry, construction industry, paper industry and sectors in which pollution control is a must such as refrigerators, wash machines, dishwashers and video cameras.

The most commonly used stainless steel wires for cold forming are the K304Cu and K302HQ quality. K316Cu quality should be preferred for the production of materials resistant to acidic environments.

With K410 and K430 quality it is possible to manufacture rivets, screws and nuts with magnetic characteristics.

Surface properties regarding the area of use;

Copper coated
Stereat coated
Matte surface

Kromtel Stainless steel wires for nuts, bolt screws and rivets are conforming the world standards for physical, chemical and mechanic properties and are the most appropriate wires for cold forming process.

Stainless Steel Spring Wires

March 15, 2023 March 30, 2023

Wire

All kinds of energies are converted to thermal energy at one point. You can reduce the thermal energy and keep it as potential energy. Stainless steel wires for spring applications have a broad range of usage such as automotive, construction, space, house appliances, food and pharmacy industries. Cold rolled steel spring wires that can be obtained: compression spring, extension spring, torsion spring, special form springs which require high surface tensile. For battery manufacturing purposes Ni coated (Ni-Br) wires are provided. Stainless steel wires for springs are provided on standard up to 0.80 mm with shiny surface and in different type of spools, all sizes above 0.20 mm and thicker are provided as coils with soap coating and nickel coating. Approximately more than 150 different sizes from 0.10 mm to 12 mm can be found in Kromtel stocks.

Kromtel Norm	AISI	Werkstoff Nr.	Application
K302	302	1,4310	K302 quality wires are the most common used ones. They have almost no magnetic characteristics and are general purpose wires.
K302 (Ni-Br)	302 (Ni-Br)	–	Those wires are used for battery springs due to their excellent soldering characteristics and have a shiny surface that is coated with nickel.
K302 (Ni-Br)	302 (Ni-Br)	–
KOSNIC	–	–	Those wires are used for battery springs due to their excellent soldering characteristics and have a shiny surface that is coated with nickel.
K304	304	1,4301	K304 quality wires are used for general purposes and do not have magnetic features.
K316	316	1,4401	Due to its high level of Nickel and Molybdenum it shows high resistance against corrosion. K316 quality wires which show high resistance against rusting can be used for springs that are utilized in acidic environments.
K316Ti	316Ti	1,4571	K316Ti shows higher resistance to corrosion than 316 quality due to the titanium included. These can be used for springs utilized in acidic environments.
K631	631	1,4568	The K631 has the highest property for heat, corrosion and spring compatibility. Heat annealing allows the higher surface tensile strength. It has the highest resistance against metal deformation and fatigue.

♦ Physical Properties ♦

Wire Diameter mm	Tensile Strength (N/mm2)
	Tensile Strength (N/mm2)
	K302 – K304	K316	K631
0.08-0.20	2150-2400	1650-1900	1950-2000
0.23-0.40	2050-2300	1600-1850	1930-2180
0.45-0.60	1950-2200	1600-1850	1850-2100
0.65-1.00	1850-2100	1530-1780	1800-2050
1.20-1.40	1750-2000	1450-1700	1700-1950
1.60-2.00	1650-1900	1400-1650	1600-1850
2.30-2.60	1550-1800	1320-1570	1500-1750
2.90-4.00	1450-1700	1230-1480	1400-1650
4.50-6.00	1350-1600	1100-1350	1300-1550
7.00-8.50	1300-1500	1080-1240	1200-1380
9.00-12.00	1250-1440	1050-1210	–

DIAMETER: 0.10 mm – 12 mm

♦ STANDARDS ♦
ABD: ASTM A.313	Germany : DIN 17224
England : BS 2056	Japan : JIS G 4314

♦ SURFACE PROPERTIES ♦
Coated Surfaces:
S. Coated (S-CO) :	Powder Coated	0.20 – 10.00 mm
Ni Coated (Ni-CO):	Nickel Coated + Powder Coated	0.23 – 1.20 mm
Cu Coated(Cu-CO):	Copper Coated + Powder Coated	0.80 – 1.20 mm

Shiny Surfaces:
Oil Drawn: 0.10 – 0.80 mm
Ni Coated:	Nickel coated, shiny, oil drawn	0.20 – 0.80 mm
Cu Coated:	Nickel coated, shiny, oil drawn	0.15 – 0.80 mm
Mechanically polished:		0.80 – 6.00 mm

Stainless Steel Wire for Weaving and Braiding

March 13, 2023 March 24, 2023

Wire

Stainless steel wires can be used for various weaving methods and applications due to their mechanical properties, their aesthetic surface and the fact that it can conserve its shiny view for a long time, and does not deform at high temperatures.

You can find bright annealed soft finished stainless steel wires for braiding at Kromtel. Being soft, helps the braiding process, it’s shiny and clean surface gives it more endurance against corrosion.

K304 and K316 quality wires are the most commonly used wires for braiding. Especially K314 quality wires are resistant to repeating heating and cooling conditions. So we suggest them to be used for conveyor belts.

As in industrial furnaces, the conveyor belts that will be used in high temperatures must be produced from K310 and K314 quality wires. K314 quality wires have the ability to work in high temperatures up to 1200°C.

Stainless steel wires are used in chemical industry, oil industry, synthetic fiber production, paper production and the food sector. Also we can see that due to their resistance for high temperature they are used in conveyor belts.

♦ APPROXIMATE CHEMICAL COMPOSITIONS ♦
Kromtel Normu	C	Mn	P	S	Si	Cr	Ni	Mo	Ti	AISI	Werkstoff
K304	Max. 0.07	2	0.045	0.030	1	17,5-19,5	8-10,50	–	–	304	1,4301
K309	Max. 0.20	2	0.045	0.015	1,5-2,5	19-21	11-13	–	–	309	1,4828
K310	Max. 0.10	2	0.045	0.015	1,5	24-26	19-22	–	–	310	1,4845
K314	Max. 0.20	2	0.045	0.015	1.50-2.50	24-26	19-22	–	–	314	1,4841
K316	Max. 0.07	2	0.045	0.030	1	16,5-18,5	10-13	2.00-2.50	–	316	1,4401
K321	Max. 0.08	2	0.045	0.030	1	17-19	9-12	–	Max. 0,70	321	1,4541
K304L	Max. 0.03	2	0.045	0.030	1	17,5-19,5	8,0-10,5	–	–	304L	1,4307
K316L	Max. 0.03	2	0.045	0.030	1	16,5-18,5	10-13	2,0-2,5	–	316L	1,4404
K316Ti	Max. 0.08	2	0.045	0.030	1	16,5-18,5	10,5-13,5	2,0-2,5	5x%C-0,70	316Ti	1,4571
K430	Max. 0.08	1	0.040	0.030	Max. 1	16-18	–	–	–	430	1,4016

♦ MECHANICAL PROPERTIES ♦
Diameter (mm)	K304-316		K304L- 316L		K310S – 314
Diameter (mm)	TensileStrength N/mm2	Elongation %	TensileStrength N/mm2	Elongation %	Tensile Strength N/mm2	Elongation %
0,040-0,056	880 Max	20Min	880 Max	20Min	880 Max	20Min
0,057-0,09	880 Max	25Min	880 Max	25Min	880 Max	25Min
0,091-0,22	830 Max	30Min	830 Max	30Min	830 Max	30Min
0,221-0,37	830 Max	35Min	780 Max	35Min	780 Max	35Min
0,371-0,50	810 Max	40Min	760 Max	40Min	760 Max	40Min
0,501-0,60	780 Max	40Min	740 Max	40Min	740 Max	40Min
0,61-1,60	740 Max	40Min	690 Max	40Min	740 Max	40Min
1,61-7,00	690 Max	45Min	640 Max	45Min	690 Max	45Min

♦ TOLERANCE AND OVALITY ♦
DIAMETER	TOLERANCE	OVALITY
0,040-0,056	0,002	0,002 max
0,057-0,090	0,003	0,003 max
0,091-0,370	0,005-0,004	0,004 max
0,371-0,600	0,006-0,005	0,005 max
0,61-1,40	0,01	0,010 max
1,41-1,60	0,02	0,020 max
1,61-2,60	0,03	0,030 max
2,61-5,00	0,04	0,040 max
5,10-7,00	0,05	0,050 max

Monthly Archives: March 2023

High Carbon Steel Spring Wires

♦ STEEL WIRES ♦

♦ DIN 17223/84 NORM CARBON STEEL SPRING WIRE ♦

♦ STANDARDS ♦

Stainless Steel Cold Heading Wire

♦ Stainless Steel Wires for Nuts, Bolt Screws and Rivets ♦

♦ Standards ♦

Stainless Steel Spring Wires

♦ Physical Properties ♦

♦ STANDARDS ♦

♦ SURFACE PROPERTIES ♦

Stainless Steel Wire for Weaving and Braiding

♦ APPROXIMATE CHEMICAL COMPOSITIONS ♦

♦ MECHANICAL PROPERTIES ♦

♦ TOLERANCE AND OVALITY ♦

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