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GRADE-SECTION PRODUCTS ASSORTMENT EXPORT

Contents

1. STEEL GRADES AND STANDARDS FOR THE DELIVERY
2. SHAPES, DIMENSIONS, CROSS-SECTIONS, SHAPES AND DIMENSIONS DEVIATIONS
3. SURFACE QUALITY REQUIREMENTS

1. STEEL GRADES AND STANDARDS FOR THE DELIVERY

1.1.Constructional steel grades:

• -general use;
• -carbon steels;
• -heat treatable steels;
• -carburizing steels;

  APPENDIXES:

•  -hardness in the delivery condition.

  1.2. Corrosion-resistant steel grades:

•   -martensitic-ferritic and martensitic steel grades;
• -austenitic steel grades.

  1.3.Tool steel grades

     (including high-speed)

1. STEEL GRADES AN В DELIVERY STANDARDS

 1.1. CONSRUCTIONAL STEEL GRADES

of ordinary quality, general use

CARBON CONSRUCTIONAL STEEL

STEEL GRADES AND STANDARDS FOR THE DELIVERY

ALLOY HEAT TREATABLE CONSRUCTIONAL STEEL

GRADES AND STANDARDS FOR THE DELIVERY

CONSTRUCTIONAL CASE-HARDENED STEEL GRADES AND STANDARDS FOR DELIVERY

 KIND OF PRODUCTS

Bloom with cross-section of 160-250mm and square steel billet of 50-160mm (with /without heat treatment);

The bars of  a diameter:

• - 14-200mm with surface peeling (with/without heat treatment);
• -14-75mm without surface peeling (with/without heat treatment);
• -bars with special surface finishing, dia. 2-120mm (ground, polished, with/without heat treatment);
• -square steel billet, cross section of  50-120mm, suitable for the following heat treatment , including upsetting, forging, hot forming with/without heat treatment.

  CHARACTERISTICS TO BE CONTROLLED (to be agreed when order is received):

• -macrostructure
• -ultrasonic test as per SEP 1921, class C/c
• -mechanical properties on the heat treated samples or in the delivery condition
• -non-metallic inclusions as per DIN 50602 (K4) or ASTM E45, (method A)
• -grain size as per ASTM E112 or DIN 50601
• -hardenability (+H); (HH) – according to the agreement
• -non-mixed test
• -hardness

 NOTES:

• the bars 14-200mm rd are to be produced with Ca, N, or S micro-alloying to improve the mechanical treatment;
• the limited quantity of the bars can be delivered in the heat-treated condition (normalization, annealing,  high-temperature tempering) of the length up to 8,5 m

 APPENDIXES

CONSTRUCTIONAL STEEL GRADES   (STEELMAKING)

 -  in the open electro-arc furnace

-  with/or without LHF

-  with/or without VOD

-  vacuum-arc re-melting

-  electro-slag re-melting

STEEL HARDNESS IN THE DELIVERY CONDITION, WITHOUT HEAT TREATMENT

provided with working technology.

Note: for hardness guaranteeing bars may be subject to annealing

1.2. CORROSION-RESISTANT STEEL GRADES

 MARTENSITIC-FERRITIC AND MARTENSITIC STEEL GRADES

STEEL GRADES AND STANDARDS FOR THE DELIVERY

KIND OF PRODUCTS:

•  -Bloom of cross-section of 160-250mm and square steel billet of 50-160mm (with heat treatment);
• -hot rolled peeled bars 14-200mm rd (annealed)
• -hot rolled bars with special surface finishing of a dia.2-120mm as ground and polished (annealed).

CHARACTERISTICS TO BE CONTROLLED (to be agreed when order is received):

• -macrostructure
• -ultrasonic test as per SEP 1921, class C/c
• -mechanical properties in the delivery condition
• -hardness, strength in the annealed condition
• -hardness on the samples after upsetting (as required)
• -impact test (as required)

AUSTENITIC STEEL GRADES

  STEEL GRADES AND STANDARDS FOR THE DELIVERY

  KIND OF PRODUCTS:

  Bloom of cross-section of 160-250mm and square steel billet of 50-160mm (without heat treatment);

Bars in a diameter:

• -bars of 14-200mm with surface peeling;
• -bars with special surface finishing of a dia.2-120mm as ground and polished.

  CHARACTERISTICS TO BE CONTROLLED (to be agreed when order is received):

• -  macrostructure
• -  ultrasonic test as per SEP 1921, class C/c
• -  mechanical properties in the delivery condition
• -  non-metallic inclusions as per DIN 50602 (K4) or ASTM E45 method A (A, B, C, D)
• -  intergranular corrosion resistance
• -  the roughness of the surface Rz max 20mkm as per the customer’s request

  1.3. TOOL AND HIGH-SPEED STEEL GRADES

 STEEL GRADES AND STANDARDS FOR THE DELIVERY   

Note:

steel grades X37CrMoV5-1EFS (1.2343EFS); 32CrMoV12-28EFS (1.2365EFS); X38CrMoV5-3 EFS (1.2376EFS), X40CrMoV5-1 EFS (1.2344EFS) to be Ca-treated

KIND OF PRODUCTS:

• -  round peeled bars of dia.14-200mm (annealed)
• -  bars with special surface finishing of a dia.2-120mm with special surface finishing as ground and  polished (annealed)
• -  bars of a dia.14-60mm, hot rolled, peeled, ground:  1.2436, 1.2080, 1.2379 (annealed);
• -  bars of a dia. 14-60mm, hot rolled, ground, polished: 1.3343, 1.3243 (annealed);

  CHARACTERISTICS TO BE CONTROLLED (to be agreed when order is received):

• -macrostructure
• -ultra sonic test as per SEP 1921
• -hardness
• -decarburizing layer
• -carbide inhomogeneity as per DIN 17350 (sep 1615 or ASTM A-651)
• -non-metallic inclusions (except of high-speed steels) as per DIN 50602 (K4) or ASTM E45 method A (A, B, C, D)

  2.SHAPES, DIMENSIONS, CROSS-SECTIONS, DEVIATIONS  FOR SHAPES AND DIMENSIONS

Note: according to agreement the bars with special surface finishing, dia. 2-50mm  can be delivered with max tolerances j (tolerances +/-) and K (tolerance +).

 Other delivery terms:

  The steel products can be delivered according to special Customer’s requirements with preparing of the necessary technical documentation;

3. SURFACE QUALITY OF STEEL PRODUCTS

 Note:

the surface quality of the bars shall comply with the requirements of EN 10221 class B or class C (class of the surface quality shall be specified while ordering)